Novar 1003 инструкция по эксплуатации - Самые разные инструкции по применению

Для чего нужна установка компенсации реактивной мощности?

Как известно из курса электротехники, электрическая энергия бывает двух видов: активная и реактивная. Активная — это та энергия, которая потребляется (преобразуется) из одного вида в другой и выполняет какую-либо полезную работу. Например, крутит вал электродвигателя, нагревает нагревательный элемент, преобразуется в световой поток и освещает что-нибудь. Реактивная энергия — это энергия, которая циркулирует от источника к потребителю и назад. Она не потребляется, а возвращается назад в источник, чем оказывает паразитное воздействие на электрическую сеть.

Казалось бы, что плохого в реактивной энергии? Ну, носится она туда-сюда, что с неё взять? Однако, нужно понимать, что чем её больше, тем меньше активной энергии передается от источника к потребителю, потому что провод в зависимости от сечения имеет ограничения на передачу тока. Следовательно, выполняется меньше полезной работы, то есть коэффициент полезного действия питающей линии уменьшается. Пропускать по питающей линии больше энергии — нужно увеличивать сечение провода, а это дорого. Поэтому самый лучший вариант — избавиться от реактивной энергии совсем.

Есть несколько способов это сделать. Один из них — установка устройства компенсации реактивной мощности (УКРМ). Это самый простой и дешевый способ поднятия КПД питающей линии. Суть его заключается в том, что у потребителя устанавливаются батареи конденсаторов, которые являются накопителями электроэнергии. Как известно, потребители электроэнергии имеют активно-индуктивный характер, т. е. состоят из активных потребителей (например, нагреватели) и активно-индуктивных (обмотки трансформаторов, катушки реле, электродвигатели — провода в них тоже нагреваются). Так же известно, что при таком характере нагрузке ток отстает он напряжения на угол от 0 до 90 градусов. Проще говоря, когда напряжение на нагрузке уже достигло максимума (амплитудного значения), ток еще не успел этого сделать и достигнет максимума чуть позже, когда величина напряжения будет уменьшаться. Идеальным вариантом является ситуация, когда ток без опоздания от напряжения появляется на нагрузке и точь-в-точь повторяет форму напряжения. Это характерно для чисто активной нагрузки.

Если к индуктивности ток бежит неохотно, то к ёмкости он бежит вперед напряжения. Ток обожает ёмкость. Поэтом, чтобы «приманить» ток к нагрузке, и устанавливают конденсаторные батареи. К ним ток бежит охотнее, работает — не ленится, поэтому КПД линии повышается.

Это свойство и используют для того, чтобы скомпенсировать реактивную энергию. Сама конденсаторная установка — простейшее устройство, состоящее из конденсаторов, которые подключаются параллельно друг другу. Подключаются они могут все сразу — тогда конденсаторная установка является не регулируемой — или в определенной последовательности, в зависимости от набора емкостей. Каждый набор называют ступенью. Ступени предназначены для дробления общей емкости УКРМ и чем их больше, тем точнее УКРМ позволяет регулировать коэффициент мощности.

Если УКРМ регулируемая, то в её составе есть специальный контроллер, которому для поддержания нужного коэффициента мощности требуется информация о напряжении и токе нагрузки. Зная напряжение и ток, контроллер вычисляет рассогласование между ними (отставание или опережение тока от напряжения), а это и есть коэффициент мощности или COS φ. По величине рассогласование контроллер определяет сколько ступеней подключить или отключить, чтобы добиться заданной величины COS φ. Вот так вот всё просто и не затейливо.

Правильная настройка регулятора

Чтобы регулятор правильно работал, он должен получать достоверные данные тока и напряжения. Поэтому его нужно правильно подключить. Нет ничего лучше для понимания теории, как применение её на практике. На практике оказался регулятор NOVAR 1214 — один из самых распространенных, поэтому на его примере и практике рассмотрим основные параметры настройки регулирования COS φ.

Требуемый COS φ: Это задание для поддержания нужного значения COS φ в сети.

Было задано значение: 0,9

Время регулирования при недокомпенсации: Когда COS φ меньше, чем требуемый ровно на такую величину, что его может скомпенсировать самая маленькая ступень конденсаторов, то выжидается это время, прежде чем ступень будет включена. Если рассогласование больше, чем смогла бы скомпенсировать самая маленькая ступень конденсаторов, то время сокращается по одному из двух законов — квадратично или линейно (параметр с буквой L). Это можно задать при настройке.

Если же рассогласование меньше, чем могла бы скомпенсировать самая маленькая ступень, то время увеличивается в два раза. Регулирование прекращается, когда рассогласование меньше, чем могла бы скомпенсировать 1/2 емкости самой маленькой ступени конденсаторов.

Оставлено заводское значение 3 мин.

Время регулирования при перекомпенсации: Когда COS φ больше, чем требуемый, это считается «перекомпенсацией» и алгоритм работы такой же, как и при «недокомпенсации», только здесь ступени не подключаются, а отключаются по истечении указанного времени.

Оставлено заводское значение 30 сек.

Ширина полосы регулирования при большой нагрузке: Если в системе электроснабжения периодически возникают большие переменные нагрузки, вызывающие некоторое отклонение COS φ на какое-то время, чтобы зря не включать/отключать дополнительные ступени, предусмотрен данный параметр. Он несколько расширяет полосу регулирования в зоне большой нагрузки на заданный диапазон:

Как видно из рисунка, в зонах «А» и «B» ширина зоны нечувствительности определяется емкостью наименьшей ступени. Зона «С» начинается там, где полоса нечувствительности начинает расходиться. Таким образом, чем больше нагрузка, тем больше отклонение от уставки и тем больше зона нечувствительности.

Установлено заводское значение 0,010

Номинальный первичный ток: Первичный ток измерительного трансформатора тока. Этот параметр нужен для правильной индикации мощностей, на что-то существенное он не влияет.

Для трансформатора тока 800/5 установлено значение 800

Номинальный вторичный ток: Выбирается из диапазона 5А или 1А. Этот параметр должен быть указан правильно, иначе расчет COS φ будет неверным.

Установлено значение 5 А

Время блокировки повторного включения: Время достаточное для разряда конденсаторов в одной ступени перед тем как она снова будет включена. Пока это время не истекло, данная ступень не включится даже в ручном режиме, поэтому при необходимости будут включаться другие ступени, у которых время повторного включения уже вышло.

Установлено 10 мин по указанию инструкции на установку

Тип измерительного напряжения: Для правильного расчета регулятора нужно знать, какое измерительное напряжение подведено — линейное (LL) или фазное (LN).

Установлено LL (линейное), так как измерительный трансформатор напряжения подключен между фазами «A» и «B» (L1-L2).

Способ присоединения тока и напряжения: Параметр сообщает регулятору, как подключены измерительные цепи тока и напряжения относительно друг друга. Для регулятора жестко принято, что трансформатор тока находится в фазе «А» и Л1 направлено к источнику, а Л2 — к потребителям. Выбирается только способ подключения напряжений. Для линейного подключения: L1-N; L2-N; L3-N; N-L1; N-L2; N-L3. Для линейного подключения: L1-L2; L2-L3; L3-L1; L2-L1; L3-L2; L1-L3. Вот здесь придется поколдовать, если подключение отличается от стандартного.

Схема подключения предложенная производителем установки подразумевает, что трансформатор тока будет находится в фазе «С», а как уже упоминалось, измерение напряжения производится в фазах «A» и «B»:

С такой схемой подключения нельзя выбрать значение параметра L1-L2, потому что это будет неверно. Давайте разберемся. Рассмотрим векторную диаграмму, которая должна образоваться при нашем способе подключения и диаграмму, которую будет ожидать регулятор при выборе параметра L2-L3:

Как видно из рисунков, выставление параметров так, как это по факту даст неверную работу регулятора. Что же делать? Будем исходить из того, что для регулятора жестко принят тот факт, что ток меряется в фазе «А» (L1). Тогда развернем нашу векторную диаграмму так, чтобы ток фазы «С» совпал с током в фазе «А»:

Теперь более чем очевидно, что напряжения нужно выбирать не L1-L2, а L2-L3.

Коэффициент измерительного трансформатора напряжения:

В нашем случае сеть имеет номинальное напряжение 10 кВ, а вторичка трансформатора — 100 В, следовательно, коэффициент равен 100

Номинальное напряжение компенсирующей системы:

Установлено 10, что соответствует напряжению 10 кВ

Программа коммутаций: Это комбинация ступеней, где для каждой ступени указано число, кратное мощности наименьшего конденсатора. Например, 1123 означает, что к первой и второй ступени присоединены конденсаторы с наименьшей емкостью; ко второй ступени — емкость батареи в два раза больше; третья ступень имеет емкость конденсаторов в три раза больше. Условия такие: к первой ступень должна быть подключена наименьшая емкость; емкости для ступеней больше, чем пятая считаются равным как у пятой.

Для нашей установки подойдет 1111, так как все конденсаторы имеют одинаковый номинал

Номинальная мощность наименьшего конденсатора: Задается в КВар дискретно

Установленные конденсаторы имеют мощность 450 кВар. Регулятор предложил 433 или 466. Был выбран 466 как ближайший.

Количество конденсаторов:

Установлено 2, выбираем 2.

Номинальная мощность отдельных ступеней: Указывается, какие конденсаторы в каких ступенях установлены

Так как ступени одинаковые, то указал для всех значение 466

Регулируемые/постоянные ступени: Указывается, какие ступени будут регулироваться (C или L), какие будут включены постоянно (1), какие будут отключены вовсе (0). Замечу, что регулируемые ступени могут быть как емкостные (С), так и дроссельные (L). Поэтому нужно указать соответствующую букву при выборе регулируемой ступени.

Так как в нашем случае используются только емкостные ступени, для них был установлен индекс «C».

Эти параметры основные и как правило их достаточно для того, чтобы настроить работу регулятора мощности.

Проверка работы регулятора

Теперь нужно проверить правильность настроек и алгоритма работы. Для этого нужен источник тока и напряжения с регулируемым углом между ними. Для таких целей вполне подойдет Ретом-21 или что-то аналогичное. Начнем с подключений:

Задаем 100 В в измерительный канал напряжения и около 2 А в измерительный канал тока. Угол между напряжением и током должен быть +90°, так как для нашей схемы подключения ток опережает напряжение на 90°. Это состояние будет соответствовать COS φ = 1.

Проверка правильности подключения

Вращая фазорегулятор и наблюдая за показаниями на дисплее регулятора NOVAR 1214 убедиться:

Максимальное значение активная мощность принимает при углах +90° и -90° (270°), а реактивная мощность стремиться к нулю;
В этих же точках COS φ = 1;
При +90° активная мощность имеет положительный знак, а при -90°(270°) — отрицательный, и загорается светодиод «Экспорт»;
В точках 0° и 180° активная мощность — минимальна, реактивная мощность — максимальна;
COS φ = 0;
При 0° реактивная мощность — положительна (или с индексом «L»), а при 180° — отрицательна (или с индексом «С»). Такое обозначение знака, не характерное для электротехники, принято в регуляторе.

Если всё так, то проверяем работу алгоритма.

Проверка работы регулятора с действием на ступени

Проделаем следующие шаги:

Устанавливаем значение напряжения 100 В, тока — 2 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Фиксируем значение этого угла. Моргание светодиода говорит о том, что мы вышли из зоны, когда половина наименьшей ступени конденсатора могла бы скомпенсировать COS φ;
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Засекаем угол и время. Через время, равное времени регулирования при недокомпенсации, должна сработать одна из ступеней, как правило — первая.
Дожидаемся, когда включатся последовательно все ступени, каждая по истечении времени регулирования при недокомпенсации;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Светодиод «ИНДУКТИВНОСТЬ» погаснет во время увеличения угла. Фиксируем угол и засекаем время. Ступени должны начать отключаться последовательно по истечении удвоенного времени регулирования при перекомпенсации.
Увеличивает ток до 4 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Значение этого угла должно быть меньше, чем в пункте 3.
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Угол и время срабатывания должны быть меньше, чем в пункте 4.
Дожидаемся, когда включатся последовательно все ступени;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Угол должен быть меньше, а время — такое же как и в п. 6.

Ниже приведена диаграмма срабатывания регулятора в зависимости от угла между током и напряжением.

Предложенная далее проверка не является догмой. Вы можете сами определить достаточность мер для проверки, уменьшить их или увеличить. В любом случае, если Вы поделитесь своими мыслями и аргументами — это только улучшит нашу методику.

Источник

Для чего нужна установка компенсации реактивной мощности?

Правильная настройка регулятора

Требуемый COS φ: Это задание для поддержания нужного значения COS φ в сети.

Было задано значение: 0,9

Оставлено заводское значение 3 мин.

Оставлено заводское значение 30 сек.

Установлено заводское значение 0,010

Для трансформатора тока 800/5 установлено значение 800

Установлено значение 5 А

Установлено 10 мин по указанию инструкции на установку

Теперь более чем очевидно, что напряжения нужно выбирать не L1-L2, а L2-L3.

Коэффициент измерительного трансформатора напряжения:

Номинальное напряжение компенсирующей системы:

Установлено 10, что соответствует напряжению 10 кВ

Для нашей установки подойдет 1111, так как все конденсаторы имеют одинаковый номинал

Номинальная мощность наименьшего конденсатора: Задается в КВар дискретно

Установленные конденсаторы имеют мощность 450 кВар. Регулятор предложил 433 или 466. Был выбран 466 как ближайший.

Количество конденсаторов:

Установлено 2, выбираем 2.

Номинальная мощность отдельных ступеней: Указывается, какие конденсаторы в каких ступенях установлены

Так как ступени одинаковые, то указал для всех значение 466

Так как в нашем случае используются только емкостные ступени, для них был установлен индекс «C».

Эти параметры основные и как правило их достаточно для того, чтобы настроить работу регулятора мощности.

Проверка работы регулятора

Проверка правильности подключения

Вращая фазорегулятор и наблюдая за показаниями на дисплее регулятора NOVAR 1214 убедиться:

Максимальное значение активная мощность принимает при углах +90° и -90° (270°), а реактивная мощность стремиться к нулю;
В этих же точках COS φ = 1;
При +90° активная мощность имеет положительный знак, а при -90°(270°) — отрицательный, и загорается светодиод «Экспорт»;
В точках 0° и 180° активная мощность — минимальна, реактивная мощность — максимальна;
COS φ = 0;
При 0° реактивная мощность — положительна (или с индексом «L»), а при 180° — отрицательна (или с индексом «С»). Такое обозначение знака, не характерное для электротехники, принято в регуляторе.

Если всё так, то проверяем работу алгоритма.

Проверка работы регулятора с действием на ступени

Проделаем следующие шаги:

Устанавливаем значение напряжения 100 В, тока — 2 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Фиксируем значение этого угла. Моргание светодиода говорит о том, что мы вышли из зоны, когда половина наименьшей ступени конденсатора могла бы скомпенсировать COS φ;
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Засекаем угол и время. Через время, равное времени регулирования при недокомпенсации, должна сработать одна из ступеней, как правило — первая.
Дожидаемся, когда включатся последовательно все ступени, каждая по истечении времени регулирования при недокомпенсации;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Светодиод «ИНДУКТИВНОСТЬ» погаснет во время увеличения угла. Фиксируем угол и засекаем время. Ступени должны начать отключаться последовательно по истечении удвоенного времени регулирования при перекомпенсации.
Увеличивает ток до 4 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Значение этого угла должно быть меньше, чем в пункте 3.
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Угол и время срабатывания должны быть меньше, чем в пункте 4.
Дожидаемся, когда включатся последовательно все ступени;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Угол должен быть меньше, а время — такое же как и в п. 6.

Ниже приведена диаграмма срабатывания регулятора в зависимости от угла между током и напряжением.

Источник

Правильная настройка регулятора

Требуемый COS φ: Это задание для поддержания нужного значения COS φ в сети.

Было задано значение: 0,9

Оставлено заводское значение 3 мин.

Оставлено заводское значение 30 сек.

Установлено заводское значение 0,010

Для трансформатора тока 800/5 установлено значение 800

Установлено значение 5 А

Установлено 10 мин по указанию инструкции на установку

Теперь более чем очевидно, что напряжения нужно выбирать не L1-L2, а L2-L3.

Коэффициент измерительного трансформатора напряжения:

Номинальное напряжение компенсирующей системы:

Установлено 10, что соответствует напряжению 10 кВ

Для нашей установки подойдет 1111, так как все конденсаторы имеют одинаковый номинал

Номинальная мощность наименьшего конденсатора: Задается в КВар дискретно

Установленные конденсаторы имеют мощность 450 кВар. Регулятор предложил 433 или 466. Был выбран 466 как ближайший.

Количество конденсаторов:

Установлено 2, выбираем 2.

Номинальная мощность отдельных ступеней: Указывается, какие конденсаторы в каких ступенях установлены

Так как ступени одинаковые, то указал для всех значение 466

Так как в нашем случае используются только емкостные ступени, для них был установлен индекс «C».

Эти параметры основные и как правило их достаточно для того, чтобы настроить работу регулятора мощности.

Проверка работы регулятора

Проверка правильности подключения

Вращая фазорегулятор и наблюдая за показаниями на дисплее регулятора NOVAR 1214 убедиться:

Максимальное значение активная мощность принимает при углах +90° и -90° (270°), а реактивная мощность стремиться к нулю;
В этих же точках COS φ = 1;
При +90° активная мощность имеет положительный знак, а при -90°(270°) — отрицательный, и загорается светодиод «Экспорт»;
В точках 0° и 180° активная мощность — минимальна, реактивная мощность — максимальна;
COS φ = 0;
При 0° реактивная мощность — положительна (или с индексом «L»), а при 180° — отрицательна (или с индексом «С»). Такое обозначение знака, не характерное для электротехники, принято в регуляторе.

Если всё так, то проверяем работу алгоритма.

Проверка работы регулятора с действием на ступени

Проделаем следующие шаги:

Устанавливаем значение напряжения 100 В, тока — 2 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Фиксируем значение этого угла. Моргание светодиода говорит о том, что мы вышли из зоны, когда половина наименьшей ступени конденсатора могла бы скомпенсировать COS φ;
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Засекаем угол и время. Через время, равное времени регулирования при недокомпенсации, должна сработать одна из ступеней, как правило — первая.
Дожидаемся, когда включатся последовательно все ступени, каждая по истечении времени регулирования при недокомпенсации;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Светодиод «ИНДУКТИВНОСТЬ» погаснет во время увеличения угла. Фиксируем угол и засекаем время. Ступени должны начать отключаться последовательно по истечении удвоенного времени регулирования при перекомпенсации.
Увеличивает ток до 4 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Значение этого угла должно быть меньше, чем в пункте 3.
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Угол и время срабатывания должны быть меньше, чем в пункте 4.
Дожидаемся, когда включатся последовательно все ступени;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Угол должен быть меньше, а время — такое же как и в п. 6.

Ниже приведена диаграмма срабатывания регулятора в зависимости от угла между током и напряжением.

Источник

Для чего нужна установка компенсации реактивной мощности?

Правильная настройка регулятора

Требуемый COS φ: Это задание для поддержания нужного значения COS φ в сети.

Было задано значение: 0,9

Оставлено заводское значение 3 мин.

Оставлено заводское значение 30 сек.

Установлено заводское значение 0,010

Для трансформатора тока 800/5 установлено значение 800

Установлено значение 5 А

Установлено 10 мин по указанию инструкции на установку

Теперь более чем очевидно, что напряжения нужно выбирать не L1-L2, а L2-L3.

Коэффициент измерительного трансформатора напряжения:

Номинальное напряжение компенсирующей системы:

Установлено 10, что соответствует напряжению 10 кВ

Для нашей установки подойдет 1111, так как все конденсаторы имеют одинаковый номинал

Номинальная мощность наименьшего конденсатора: Задается в КВар дискретно

Установленные конденсаторы имеют мощность 450 кВар. Регулятор предложил 433 или 466. Был выбран 466 как ближайший.

Количество конденсаторов:

Установлено 2, выбираем 2.

Номинальная мощность отдельных ступеней: Указывается, какие конденсаторы в каких ступенях установлены

Так как ступени одинаковые, то указал для всех значение 466

Так как в нашем случае используются только емкостные ступени, для них был установлен индекс «C».

Эти параметры основные и как правило их достаточно для того, чтобы настроить работу регулятора мощности.

Проверка работы регулятора

Проверка правильности подключения

Вращая фазорегулятор и наблюдая за показаниями на дисплее регулятора NOVAR 1214 убедиться:

Максимальное значение активная мощность принимает при углах +90° и -90° (270°), а реактивная мощность стремиться к нулю;
В этих же точках COS φ = 1;
При +90° активная мощность имеет положительный знак, а при -90°(270°) — отрицательный, и загорается светодиод «Экспорт»;
В точках 0° и 180° активная мощность — минимальна, реактивная мощность — максимальна;
COS φ = 0;
При 0° реактивная мощность — положительна (или с индексом «L»), а при 180° — отрицательна (или с индексом «С»). Такое обозначение знака, не характерное для электротехники, принято в регуляторе.

Если всё так, то проверяем работу алгоритма.

Проверка работы регулятора с действием на ступени

Проделаем следующие шаги:

Устанавливаем значение напряжения 100 В, тока — 2 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Фиксируем значение этого угла. Моргание светодиода говорит о том, что мы вышли из зоны, когда половина наименьшей ступени конденсатора могла бы скомпенсировать COS φ;
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Засекаем угол и время. Через время, равное времени регулирования при недокомпенсации, должна сработать одна из ступеней, как правило — первая.
Дожидаемся, когда включатся последовательно все ступени, каждая по истечении времени регулирования при недокомпенсации;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Светодиод «ИНДУКТИВНОСТЬ» погаснет во время увеличения угла. Фиксируем угол и засекаем время. Ступени должны начать отключаться последовательно по истечении удвоенного времени регулирования при перекомпенсации.
Увеличивает ток до 4 А;
Выставляем по дисплею регулятора требуемый COS φ = 0.9;
Медленно вращая фазорегулятор в сторону уменьшения косинуса (угол стремится к 0°) находим момент, когда начинает моргать светодиод «ИНДУКТИВНОСТЬ«. Значение этого угла должно быть меньше, чем в пункте 3.
Вращаем регулятор далее к уменьшению косинуса (угол стремится к 0°), находим момент, когда светодиод «ИНДУКТИВНОСТЬ» начинает светиться ровным светом. Угол и время срабатывания должны быть меньше, чем в пункте 4.
Дожидаемся, когда включатся последовательно все ступени;
Вращая фазорегулятор в сторону увеличения COS φ (угол стремится к 90°), достигаем момента, когда начинаем моргать светодиод «ЕМКОСТЬ«. Угол должен быть меньше, а время — такое же как и в п. 6.

Ниже приведена диаграмма срабатывания регулятора в зависимости от угла между током и напряжением.

Источник

KMB systems, s.r.o.
Dr. M. Horákové 559, 460 06 Liberec 7, Czech Republic
tel. +420 485 130 314, fax +420 482 736 896
email : [email protected], internet : www.kmbsystems.eu
Power Factor Controllers
NOVAR-1106 / 1114 / 1206 / 1214 / 1414
NOVAR-1xxx / S400
NOVAR-1005 / 1007 / 1005D / 1007D
NOVAR-1312, NOVAR-1312-3, NOVAR-1005T
Firmware v. 1.8 / 1.3 ( N-1312, N-1005T )
Operating Manual
9/2016
Novar 1xxx
KMB systems
LIST OF CONTENTS
1. DESCRIPTION.................................................................. 6
1.1
Manual Structure...................................................................................................................................6
1.2
Novar1106/1114/1206/1214 Basic Functions .....................................................................................6
1.3
Novar Controller Version “/S400”........................................................................................................7
1.4
Novar-1005 / 1007 / 1005D / 1007D.......................................................................................................7
1.5
Novar1312, Novar1312-3, Novar1005T ................................................................................................7
1.6
Novar1414..............................................................................................................................................8
1.7
History of Firmware Versions ..............................................................................................................8
1.8
Front Panel ............................................................................................................................................9
1.9
Numeric Display....................................................................................................................................9
1.9.1
Novar 11xx / 12xx / 13xx Controllers..............................................................................................9
1.9.1.1 Instantaneous Measurement Values .........................................................................................9
1.9.1.2 Main Branch...............................................................................................................................9
1.9.1.2.1 COS Branch.......................................................................................................................11
1.9.1.2.2 A Branch ............................................................................................................................12
1.9.1.2.3 V Branch ............................................................................................................................13
1.9.1.3 Controller Parameters..............................................................................................................14
1.9.2
Novar 10xx Controllers.................................................................................................................15
1.9.3
Test and Error Messages.............................................................................................................15
1.10 Indication LEDs...................................................................................................................................15
1.10.1
Output State Indications ...............................................................................................................16
1.10.2
Trend Indication............................................................................................................................16
1.10.3
Indication of Manual Mode ...........................................................................................................16
1.10.4
Indication of Backfeed (Power Export) .........................................................................................16
1.10.5
Alarm Indication............................................................................................................................16
2. INSTALLATION.............................................................. 17
2.1
Physical................................................................................................................................................17
2.2
Connection ..........................................................................................................................................17
2.2.1
Power Supply ...............................................................................................................................17
2.2.1.1 Standard Version Controllers...................................................................................................17
2.2.1.2 “/S400” Version Controllers......................................................................................................18
2.2.1.3 Novar 1005 / 1007 Controllers .................................................................................................18
2.2.1.4 Novar 1005D / 1007D Controllers............................................................................................19
2.2.1.5 Protection.................................................................................................................................19
2.2.2
Measurement Voltage ..................................................................................................................19
2.2.2.1 11xx and 10xx Line Controllers................................................................................................19
2.2.2.2 12xx Line Controllers ...............................................................................................................19
2.2.3
Measurement Current ..................................................................................................................20
2.2.3.1 Novar 11xx / 12xx / 13xx Controllers .......................................................................................20
2.2.3.2 Novar 10xx Controllers ............................................................................................................20
2.2.4
Error Indication.............................................................................................................................20
2.2.4.1 Novar 11xx / 12xx / 13xx Controllers .......................................................................................20
2.2.4.2 Novar 10xx Controllers ............................................................................................................20
2.2.5
Output Relays...............................................................................................................................20
2.2.5.1 Standard Version Controllers...................................................................................................20
2.2.5.2 “/S400” Version Controllers......................................................................................................20
2.2.5.3 Novar 10xx Controllers ............................................................................................................21
2
Novar 1xxx
KMB systems
2.2.6
Second Metering Rate, External Alarm ........................................................................................21
2.2.7
Communication Interface .............................................................................................................21
2.2.7.1 RS-485 Communication Interface............................................................................................21
2.2.7.2 Ethernet (IEEE802.3) Interface................................................................................................22
3. PUTTING IN OPERATION..............................................23
3.1
First Use...............................................................................................................................................23
3.2
Automatic Connection Configuration Detection Process...............................................................23
3.3
Automatic Section Power Recognition Process..............................................................................24
4. OPERATION ...................................................................27
4.1
Setup ....................................................................................................................................................27
4.1.1
Editing Parameters and Clearing Recorded Measurement Values..............................................27
4.1.1.1 Parameter Editing ....................................................................................................................27
4.1.1.2 Clearing Recorded Measurement Values ................................................................................27
4.1.1.3 Enable / Disable Parameter Edit..............................................................................................27
4.1.2
Parameter 01/07 – Target Power Factor......................................................................................28
4.1.3
Parameter 02/08 – Undercompensation Control Time.................................................................28
4.1.4
Parameter 03/09 – Overcompensation Control Time...................................................................29
4.1.5
Parameter 04/10 – Control Bandwidth on High Loads .................................................................29
4.1.6
Parameter 05/11 – Offset Power..................................................................................................31
4.1.7
Parameter 06 – Metering Rate 2 Operation .................................................................................32
4.1.8
Parameters 12,13 – Metering Current Transformer (CT) Ratio ...................................................32
4.1.9
Parameter 14 – Reconnection Delay Time ..................................................................................32
4.1.10
Parameters 15, 16 – Type of Measurement Voltage and Connection Configuration ...................33
4.1.10.1
Setting Type of Connection Configuration if Measuring at Power Supply Transformer’s
Opposite Sides ..........................................................................................................................................34
4.1.11
Parameter 17 – Metering Voltage Transformer (VT) Turns Ratio ................................................35
4.1.12
Parameter 18 – Compensation System Nominal Voltage (UNOM)................................................35
4.1.13
Parameter 20 – Automatic Section Power Recognition Process..................................................35
4.1.14
Parameter 21, 22 – Switching Program, Selection of Linear Switching Mode and Smallest
Capacitor (C/ kMIN) Nominal Power ................................................................................................................36
4.1.15
Parameter 23 – Number of Capacitors.........................................................................................37
4.1.16
Parameter 25 – Compensation Section Nominal Power ..............................................................37
4.1.17
Parameter 26 – Fixed Sections, Switching Cooling and Heating, Alarm......................................38
4.1.17.1
Fixed Sections.....................................................................................................................38
4.1.17.2
Switching Cooling and Heating............................................................................................39
4.1.17.3
Alarm Signalling ( Novar 10xx only ) ...................................................................................39
4.1.18
Parameter 27 – Limit Power Factor for Compensation by Choke ................................................39
4.1.19
Parameter 30 – Alarm Setting......................................................................................................39
4.1.19.1
Alarm Indication...................................................................................................................41
4.1.19.2
Alarm Actuation ...................................................................................................................41
4.1.20
Parameters 31 through 37 – Alarm Indication/Actuation Limits ...................................................42
4.1.21
Parameter 40 – Alarm Status.......................................................................................................43
4.1.22
Parameters 43, 44 – Total Section Connection Time and Number of Section Switching
Operations .....................................................................................................................................................43
4.1.23
Parameter 45 – Type of Controller Error......................................................................................43
4.1.24
Parameter 46 – Control Time.......................................................................................................43
4.1.25
Parameters 50, 51, 52 – Instrument Address, Communication Rate and Communication Protocol43
4.1.26
Parameter 55 – Power System Frequency ..................................................................................44
4.1.27
Parameters 56, 57 – average, maximum, minimum value evaluation window size .....................44
4.1.28
Parameter 58 – Temperature Display °C / °F..............................................................................45
4.1.29
Parameters 59, 60 – Cooling and Heating Switching Thresholds ................................................45
4.1.30
Parameter 63 – Offset Control .....................................................................................................45
3
Novar 1xxx
KMB systems
4.2
Section Value Accurization ................................................................................................................46
4.3
Faulty Section Indication and Disablement......................................................................................47
4.4
Compensation by Choke....................................................................................................................47
4.4.1
Basic Choke Compensation .........................................................................................................48
4.4.2
Symmetric Choke Compensation.................................................................................................48
4.5
Control Interruption ............................................................................................................................49
4.6
Manual Mode .......................................................................................................................................49
4.7
Manual Intervention in Control Process ...........................................................................................49
4.8
Controller Initialization .......................................................................................................................50
4.9
Capacitor Harmonic Load factor (CHL).............................................................................................50
4.10
Text Messages ....................................................................................................................................53
5. NOVAR1312, NOVAR1312-3, NOVAR1005T
DESCRIPTION....................................................................... 54
5.1
Basic Operation...................................................................................................................................54
5.2
Novar1312............................................................................................................................................54
5.3
Novar1312-3.........................................................................................................................................54
5.4
Novar1005T..........................................................................................................................................54
5.5
History of Firmware Versions ............................................................................................................55
5.6
Installation ...........................................................................................................................................55
5.6.1
Measurement Currents.................................................................................................................55
5.6.1.1 Novar1312 ...............................................................................................................................55
5.6.1.2 Novar1312-3 ............................................................................................................................55
5.6.1.3 Novar1005T .............................................................................................................................55
5.6.2
Transistor Outputs........................................................................................................................55
5.6.2.1 Novar-1312, Novar-1312-3 ......................................................................................................55
5.6.2.2 Novar-1005T ............................................................................................................................56
5.6.3
Relay Outputs...............................................................................................................................57
5.6.4
Communication ............................................................................................................................57
5.7
Operation .............................................................................................................................................57
5.7.1
Thyristor and Contactor Group.....................................................................................................57
5.7.2
Control Principles .........................................................................................................................57
5.8
Setup ....................................................................................................................................................58
5.8.1
Parameter 28 – Number of Capacitors in Thyristor Group...........................................................58
5.8.2
Parameter 29 – Thyristor Group Control Rate and Reconnection Delay Time ............................58
5.8.2.1 Control Operation at the Highest Control Rate ........................................................................59
6. NOVAR-1414 DESCRIPTION ........................................ 62
6.1
Basic Operation...................................................................................................................................62
6.2
Measurement Values ..........................................................................................................................62
6.2.1
Main Branch .................................................................................................................................62
6.2.2
COS Branch .................................................................................................................................62
6.2.3
A Branch.......................................................................................................................................63
6.2.4
V Branch.......................................................................................................................................63
6.3
Installation ...........................................................................................................................................63
6.3.1
Measurement Currents.................................................................................................................63
6.3.2
Communication ............................................................................................................................64
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Novar 1xxx
KMB systems
6.4
Setup ....................................................................................................................................................64
6.4.1
Parameter 16 – Method of Connection of U and I........................................................................64
7. WIRING EXAMPLES.......................................................66
8. TECHNICAL SPECIFICATIONS.....................................78
9. MAINTENANCE, TROUBLESHOOTING .......................80
5
Novar 1xxx
KMB systems
1. Description
1.1 Manual Structure
The manual has three principal divisions. The first one describes Novar1106, Novar1114, Novar1206,
and Novar1214 power factor controllers, including “/S400”-version, and simple Novar1005,
Novar1007, Novar1005D and Novar1007D models.
Novar1312, N ovar1312-3 and Novar-1005T power factor controllers, designed for rapid power factor
compensation, uses the concepts of Novar1214, or Novar-1005 respectivelly, and most their features
and operations are identical. That is why their description is in a separate chapter at the end of this
manual, and it is only about this controller’s specific features.
Similarly, it is with a three-phase Novar-1414 power factor controller. His description is therefore also
included in a separate chapter and shows only its specific characteristics.
1.2 Novar1106/1114/1206/1214 Basic Functions
Novar1xxx reactive power controllers are fully automatic instruments that allow optimum control of
reactive power compensation. They take their design concepts from the Novar 1xx/2xx line of
instruments, bringing up a number of improvements and new features while keeping the way of
operation.
The instruments feature precise voltage and current measurement circuits, and the digital processing
of values measured provides high evaluation accuracy of both true root–mean–square values of
voltage, current and power factor values. The inbuilt temperature sensor measures the temperature
inside the distribution board cabinet.
The instruments calculate fundamental harmonic component of active and reactive current with FFT
algorithm. Voltage fundamental harmonic component is calculated in an analogous manner thus
providing accurate measurement and control even in conditions of distortion by higher harmonic
components.
The voltage measurement circuit in Novar1106/1114 is internally connected to power supply terminals;
it is isolated in Novar1206/1214 allowing connection of voltage in the range from 45 to 760 V AC. The
power system frequency can vary in the range from 43 to 67 Hz. The current measurement input is a
general–purpose one for nominal value of a 1 A or 5 A metering current transformer’s secondary side.
The measurement inputs can be connected to the controller in any combination, that is any phase or
line voltage and any phase’s current.
The instrument’s installation is fully automatic. The controller automatically detects both the
connection configuration and the value of each compensation section connected. Entering these
parameters manually is also possible.
Control is provided in all four quadrants and its speed depends on both control deviation value and its
polarization (overcompensation / undercompensation). Connecting and disconnecting power factor
capacitors is carried out in such a way that achieving the optimum compensation condition is by a
single control intervention at minimum number of sections connected. At the same time, the
instrument chooses relay sections with regard to their even load and preferably connects those that
have been disconnected for the longest time and the remanent charge of which is thus minimum.
Within the control process the instrument continually checks the relay compensation sections. If
a section’s outage or change in value is detected, the section is temporarily disabled from control
under relevant setting. The section temporarily disabled is periodically tested and enabled for control
again when possible.
In measurement, harmonic component levels of both voltage and current are evaluated up to the 19th
order. The current ’s Total Harmonic Distortion, THD, and the Capacitor Harmonic Load, CHL that can
6
Novar 1xxx
KMB systems
be viewed on a display, are calculated from these measurements’ results while it is possible to preset
the THD and the CHL threshold levels at which the controller disconnects all compensation sections
thus preventing their damage. Besides that, the most adverse values are recorded into the
instrument’s memory for subsequent analysis.
Besides the power factor capacitors, it is possible to connect power factor chokes (power system
decompensation). Any output can be set as fixed, the two highest outputs can also be used to connect
the cooling or heating circuits.
The controllers come in two basic designs with different numbers of outputs: Novar1106/1206 with six
output relays and Novar1114/1214 with fourteen output relays. The Novar12xx controllers have, as
opposed to the 11xx line, an additional voltage measurement input and a second metering rate input.
Both types of controller have an Alarm relay output that can be set to indicate non-standard
conditions, such as undercurrent, overcurrent, measurement voltage failure, overvoltage, harmonic
distortion preset threshold exceeded, overcompensation or undercompensation, section limit
connection rate exceeded, section outage, backfeed condition (power export) or overheating.
The 11xx and 12xx types of the controller can be ordered in a version featuring an optional galvanicisolated RS-485 or Ethernet communication interface. All values measured can be then monitored and
the controller’s parameters set using a remote computer.
1.3 Novar Controller Version “/S400”
Controllers of version “/S400” ( model marking example : Novar-1114/S400) diifer from standard
version of the Novar-1106 / Novar-1114 / Novar-1206 / Novar-1214 models in following aspects :
•
increased maximum power supply voltage up to 500 V, both AC and DC
•
relays’ common contacts isolated, connected to additional terminals
The “/S400”-version instruments can be used at isolated networks (without neutral wire). The other
features are identical to those of standard version.
1.4 Novar-1005 / 1007 / 1005D / 1007D
These models are simplified versions of the Novar1106 / 1114 models. They are built in smaller box
and designed for less demanding applications. Novar1005 features 6 output relays, Novar1007
features 8 output relays.
The “D”-types are designed for mounting on DIN-35 bar.
1.5 Novar1312, Novar1312-3, Novar1005T
Novar1312 is designed to provide rapid compensation using thyristor switches. It differs from
Novar1214 in the two following principal aspects:
•
outputs 1 through 12 are transistor-driven
•
control speed for these outputs can be set up to 25 interventions a second
Functionally identical Novar1312-3 farther differs in that it has three current inputs and process sum of
all three phase current signals. Therefore, it allows fast compensation according three-phase power
factor.
The other features are identical to those of Novar1214.
Novar1005T differs from Novar1005 in the following principal aspects:
•
outputs 1 through 6 are transistor-driven
•
control speed for these outputs can be set up to 25 interventions a second
7
Novar 1xxx
KMB systems
The other features are identical to those of Novar1005.
Novar1312, Novar1312-3 and Novar1005T specific features are described in a separate chapter.
1.6 Novar1414
Novar1414 measures current in all 3 phases and it is designed for applications with variable load
unbalance. From Novar1214 type it differs only in additional current inputs. Description of specific
Novar-1414 properties is given in a separate chapter.
1005T
1106
6T
6R
20
2
1114
14 R
2
1206
6R
2
1214
14 R
2
1106/S400
6R
2
1114/S400
14 R
2
1206/S400
6R
2
1214/S400
14 R
2
1312
12T+ 2R
2
1312-3
12T+ 2R
2
1414
14 R
2
3-phase
controller
20
DIN-bar
20
7+1 R
panel
96x96
5+1 R
1007D
design [mm]
panel
144x144
1005D
optional
remote
communicatio
20
fast
compensation
7+1 R
temp. meas.
& fan control
1007
relay common
pole separat.
20
supply volt.
up to 500 V
5+1 R
2nd tariff
input
sensitivity
[mA]
1005
meas. volt.
separated
from supply
model
outputs
R = relay,
T=transistor
Tab. 1.1 : Novar1000-line PFC Model Overview
1.7 History of Firmware Versions
version
1.0
1.1
date of release
3/2006
4/2007
1.2
1.3
9/2007
12/2010
1.4
11/2011
1.5
1.6
1.7
1.8
5/2012
4/2014
6/2014
8/2016
note
- basic version
- 2nd metering rate functionality bug fix
- linear switching mode added to parameter 21
- external alarm (No. 14) function added
- offset function and Ethernet comm. interface option added, RS232 option cancelled, choke control improved
- choke control limitation change ( par. 27 ) at offset ( par. 63 );
- communication optimization
- choke control basic mode optimization; C/kMIN evaluation change
- THD & CHL alarm behaviour correction at voltage fail
- MaxTHD & MaxCHL values correction
- minimum decompensation choke size decreased
8
Novar 1xxx
KMB systems
1.8 Front Panel
The front panel consists of a numeric display, indication LEDs and control keys.
Figure 1.1: Front Panel
1.9 Numeric Display
Information shown on the numeric display can be divided into 3 main data groups:
• instantaneous power system values measured, such as power factor, current, voltage,
power, etc.
• controller parameters
• test and error messages
1.9.1 Novar 11xx / 12xx / 13xx Controllers
1.9.1.1 Instantaneous Measurement Values
The mode of displaying instantaneous values is the basic display mode which the controller enters on
power-up. If you switch to parameter display mode, you can get back to instantaneous value display
mode by pressing the M (Measurement) button.
The controller enters the instantaneous display mode automatically in about 30 seconds from the
moment you stop pressing control keys (or in five minutes if control time is displayed – see description
of parameter 46 further below).
1.9.1.2 Main Branch
One LED, COS or A or V, is always lit in the instantaneous display mode. These LEDs identify the
value group displayed. Instantaneous values displayed are organized in branches – see Figure 1.2.
The main branch contains the following main instantaneous values: cos, Ieff and Ueff. You can
switch between the values displayed using the ▲, ▼ buttons.
9
Novar 1xxx
KMB systems
Figure 1.2: Instantaneous value display – structure
main branch
voltage
branch
M
Pac
current
branch
M
Ieff
Ueff
cos branch
M
cos
Pre
Iact
F
Irea
CHL
dIrea
THDU
THDI
3rdharU
3rdharI
…
5thharI
19thharU
…
dPre
Temp
Acos
mincos
maxCHL
17thharI
maxTHDU
19thharI
s
APac
maxPac
APre
maxPre
19
maxdPre
maxhar3U
maxTHDI
maxTemp
…
mxhar19U
Table 1.1: List of Measurement Quantities – Main Branch
abbreviation
cos
symbol
quantity
unit
Instantaneous power factor. The value corresponds to the ratio of
instantaneous active component to instantaneous total power
fundamental harmonic value in the power system. A positive value
means inductive power factor, negative means capacitive power
factor.
Ieff
Instantaneous current effective value in the power systems
A / kA *
(including higher harmonic components).
Ueff
Instantaneous voltage effective value in the power system
V (kV)
(including higher harmonic components). By default shown in
volts. If the measurement voltage is connected via a metering
transformer, in kilovolts (see description of parameter 17).
* … in A as default; flashing decimal point indicates value in kA
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Novar 1xxx
KMB systems
Pressing the M button switches to the relevant subbranch: to the branch of power factors, power, and
temperature while displaying COS (further as COS Branch), to the current branch while displaying Ieff
(further as A Branch) or to the voltage branch while displaying Ueff (further as V Branch). Again, you
can move up and down the branch using the ▲, ▼ buttons. Displaying values of the subbranches’
quantities is indicated with periodic flashes of the quantity symbol. To get back to the main branch of
instantaneous values press button M.
Tables 1.1 through 1.4 show descriptions of the measurement quantities.
1.9.1.2.1 COS Branch
Instantaneous power values as well as recorded average, maximum and minimum values of selected
quantities are shown in the COS Branch. Power is displayed as three-phase values (single-phase
power values multiplied by three). Reactive power values are prefixed with L for positive values and C
for negative values.
The values recorded can be divided by their nature into three groups:
1. Average values Acos, APac, APre
These are average values of power factor, active and reactive power. The depth of average
can be set in parameter 56 from 1 minute to 7 days.
Note: The average values of active and reactive power are rendered with the sign. If then, for
example, the reactive power value is changing its polarity (it has alternately inductive and
capacitive character), its average value, APre, may become zero even though the
instantaneous reactive power value was not zero at any point in time under evaluation. Also
the power factor average value, which is evaluated from the average active and reactive
power using the formula
Acos =
APac
APac + A Pr e
2
2
may, in such an event, become 1 even though the instantaneous power factor was never 1
within the time evaluated.
2. Maximum and minimum values mincos, maxPac, maxPre, maxdPre
•
mincos – evaluated as a ratio of fundamental harmonic active and reactive power
moving averages. The moving average window size can be specified in parameter
57 from 1 minute to 7 days. The minimum value is recorded and displayed.
Evaluation is conditioned by the corresponding average current being at least 5% of
the nominal load as determined from the metering current transformer turns ratio
primary value (parameter12) else the value is ignored (the value is not recorder for
minimum loads).
•
maxPac, maxPre – the maximum values of fundamental harmonic active and
reactive power moving averages. The moving average window size can be specified
in parameter 57 from 1 minute to 7 days.
•
maxdPre – the maximum value of fundamental harmonic absent reactive power
moving average. As opposed to the absent reactive power instantaneous value,
dPre, which is the difference between the actual and required reactive power,
irrespective of the instantaneous condition of the controller’s closed outputs,
maxdPre is only evaluated if the required reactive power exceeds the system’s
control capacity (that is the total power of all compensation banks, or sections), and
its value is determined as a difference between this control capacity and required
power (if the control capacity is sufficient, the maxdPre value is zero). The moving
average window size can be specified in parameter 57 from 1 minute to 7 days.
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Novar 1xxx
KMB systems
3. Maximum temperature maxTemp
The temperature moving average maximum value. The moving window depth is fixed at
1 minute.
The above described recorded values can be cleared, each group separately – when clearing a value,
all other values in the same groups are cleared too. Clearing values is explained in the Editing chapter
further down the manual.
Table 1.2: List of Measurement Quantities – COS Branch
abbreviation
symbol
quantity
Pac
PAC Instantaneous fundamental harmonic active power (Power
active).
Pre
Pre Instantaneous fundamental harmonic reactive power (Power
reactive).
dPre
Instantaneous
fundamental harmonic reactive power difference
dPre
to achieve target power factor (Delta Power reactive).
O
O
Temp
Cor F Instantaneous temperature (in the distribution board cabinet, at
the controller). Displayed in degrees Celsius or Fahrenheit, as
specified in parameter 58.
Acos
ACOS Average power factor in the power system over the time
specified in parameter 56 (Average cos).
mincos nCOS Minimum power factor in the power system achieved since last
clear. The evaluation window is specified in parameter 57.
APac
Average
fundamental harmonic active power in the power
APAC
system over the time specified in parameter 56 (Average
Power active).
maxPac mPAC Maximum fundamental harmonic active power in the power
system achieved since last clear. The evaluation window is
specified in parameter 57 (Maximum Power active).
APre
Average
fundamental harmonic reactive power in the power
APre
system over the time specified in parameter 56 (Average
Power active).
maxPre mPre Maximum fundamental harmonic reactive power in the power
system achieved since last clear. The evaluation window is
specified in parameter 57 (Maximum Power reactive).
maxdPre mdPr Maximum fundamental harmonic reactive power difference to
achieve target power factor in the power system achieved
since last clear. The evaluation window is specified in
parameter 57 (Maximum Delta Power reactive).
maxTemp mOC or Maximum temperature recorded since last clear. The
evaluation is based on temperature one-minute moving
MOF averages (Maximum Temperature).
* … in kW-, kvar- units as default; flashing decimal point indicates value in MW, Mvar
unit
kW / MW *
kvar / Mvar *
kvar / Mvar *
°C or °F
—
—
kW / MW *
kW / MW *
kvar / Mvar *
kvar / Mvar *
kvar / Mvar *
°C or °F
1.9.1.2.2 A Branch
All quantities related to current are shown in this branch. The maxTHDI value can be cleared
manually.
12
Novar 1xxx
KMB systems
Table 1.3: List of Measurement Quantities – A Branch
abbreviation
symbol
Iact
ACt
Irea
reA
dIrea
dreA
THDI
tHd
3. ÷ 19.har
H-3
÷19
maxTHDI
MtHd
quantity
unit
Instantaneous active current fundamental harmonic component
A / kA *
(active).
Instantaneous reactive current fundamental harmonic component
A / kA *
(reactive); L indicates inductive, C indicates capacitive polarity.
Instantaneous reactive current fundamental harmonic component
A / kA *
difference to achieve the target power factor in the power system
(Delta reactive).
Instantaneous level of power system current’s total harmonic
%
distortion (Total Harmonic Distortion) – shows the ratio of current
higher harmonic components content, up to the 19th harmonic, to the
level of fundamental harmonic. It is only evaluated if the total power
system load is at least 5% of the nominal load in terms of current
determined by the metering current transformer conversion primary
side value (parameter 12).
Instantaneous current harmonic component level in the power
%
system.
Maximum THDI value achieved since last clear. The evaluation is
based on THDI one-minute moving averages.
* … in A as default; flashing decimal point indicates value in kA
%
1.9.1.2.3 V Branch
This branch shows all the quantities related to voltage. They are commonly used quantities. Only the
Capacitor Harmonic Load, CHL, factor needs further explanation – details to be found in chapter 4.9
further below.
The maximum values can be cleared manually. Clearing any of these values clears all the other
maximum values within this branch.
Table 1.4: List of Measurement Quantities – V Branch
abbreviation
symbol
F
F
CHL
CHL
THDU
tHd
3. ÷
19.har
H-3
÷19
maxCHL
MCHL
maxTHDU
MtHd
3. ÷ 19.
maxharI
MH-3
÷19
quantity
Instantaneous voltage fundamental harmonic component
frequency.
Instantaneous value of Capacitor Harmonic Load factor (Capacitor
Harmonic Load).
Instantaneous level of power system voltage’s total harmonic
distortion (Total Harmonic Distortion) – shows the ratio of current
higher harmonic components content, up to the 19th harmonic, to
the level of fundamental harmonic.
Instantaneous level of harmonic component voltage in the power
system.
unit
Hz
Maximum CHL value achieved since last clear. The evaluation is
based on CHL one-minute moving averages.
Maximum THDU value achieved since last clear. The evaluation is
based on THDU one-minute moving averages.
Maximum value of voltage harmonic component achieved since
last clear. The evaluation is based on harmonic component oneminute moving averages.
%
13
%
%
%
%
%
Novar 1xxx
KMB systems
1.9.1.3 Controller Parameters
You can view controller parameters by pressing the P button (parameters). First the parameter
number shows momentarily and then its value does. The parameter number flashes momentarily
every five seconds for better orientation.
The parameters can be divided into three main groups:
• Parameters determining controller functions. These parameters can be set to direct the
control process. There are target power factor, control period, reconnection delay time,
etc.
• Parameters indicating controller’s current condition. This is the alarm (parameter 40),
error condition (parameter 45), and control time (parameter 46). These parameters’
values are set by the controller and they identify nonstandard or error conditions and
monitor progress of the control process in detail.
• Total connected times recorded and numbers of connections of each compensation
banks, or sections (parameters 43 and 44, respectively). These values are set by the
controller and the operator can only clear them.
The parameters are organized by ordinal number in the main branch – see Figure 1.3. Some of the
parameters (parameter 25 – sectional power, 26 – fixed sections, 30 – alarm setting, 40 – state of
alarm, 43 – total connected times, 44 – number of sections connected) are located on side branches
for easier navigation. You can switch to a side branch with selected parameters by pressing button P
(parameters) and switch back to the main branch in the same way. Side branch parameter displayed
are identified by a dash between the parameter number and value. For example: in the main branch,
while showing parameter 26 (fixed sections), you will see 01 C (section 1 is a capacitive
compensation one); if you want to display conditions of the other sections, you need to switch display
to the side branch by pressing button P; the display will change to 01–
01–C and now you can move up
and down the branch, through all sections’ values. Pressing button P again returns display to the main
branch (the dash disappears).
Figure 1.3: Parameter Display – Structure
P-01
P-02
side branch
P-03
01-C
P
main branch
P-25
14-C
P-xx
Pressing button M (measurement) returns to the instantaneous value display mode. The controller
gets back to this mode automatically in about 30 seconds from the last press of button.
14
Novar 1xxx
KMB systems
Exception: In the Manual mode the parameter values cannot be viewed. Instantaneous output values
are displayed on pressing button P (parameters) — see description further below.
1.9.2 Novar 10xx Controllers
Novar1005, 1007, 1005D and 1007D controllers are equipped with 3 buttons only – instead M- and Pbuttons, they features one ►- button.
Listing through windows is analogic; the only difference is that both instantaneous measured values
and controller parameters are situated in one common main branch, one below another ( see Fig.1.4 ).
Fig. 1.4 : Instantaneous values and parameters (Novar 1005 / 1007)
main branch
cos
current
branch
►
Ieff
Ueff
cos branch
►
Irea
F
P-01
CHL
P-02
…
Pre
Iact
voltage
branch
►
Pac
…
…
…
…
…
P-03
…
P-25
side branch
►
01-C
P-26
02-C
…
…
P-xx
08-C
1.9.3 Test and Error Messages
In the instantaneous value display mode a test or error message pops up in place of an instantaneous
power factor value in some situations. Each message is described further below in more detail. In
these situations, if the value shown does not represent instantaneous power factor, the COS LED
flashes.
1.10 Indication LEDs
Besides the numeric display and adjacent LEDs, COS , A , V, the front panel has some more
indication LEDs.
15
Novar 1xxx
KMB systems
1.10.1 Output State Indications
The array of LEDs at the top right of the front panel show the current state of output relays. Each LED
is assigned a number from 1 to 14, and if lit, they indicate closed contacts of the corresponding output
relay.
If a LED is flashing, it means the controller wants to connect the output, but it has to wait for the delay
time to elapse. The corresponding output relay contacts are open and they will be closed as soon as
the reconnection delay time has elapsed.
An exception is the power-up display test to check correct operation of all display elements. In this test
the display shows TEST and all indication LEDs come on and go out one by one. All output relays stay
open while the test is running.
1.10.2 Trend Indication
These LEDs show the magnitude of deviation of the true instantaneous reactive power in the power
system from optimum reactive power value which would correspond to the specified value of required
power factor.
If the deviation is smaller than a half of the reactive power value of the smallest capacitor, both LEDs
are dark. If the deviation is greater than a half of, but smaller than, the reactive power value of the
smallest capacitor, the corresponding LED flashes — if lagging (undercompensation), the IND LED
flashes; if leading (overcompensation), the CAP LED flashes. If the deviation exceeds the value of the
smallest capacitor, the corresponding LED is permanently lit.
Exceptions to these LEDs’ meanings are the following situations:
• measurement U and I method of connection is not defined (parameter 16)
• automatic connection configuration detection process is in progress
• automatic section power recognition process is in progress
If the method of connection is not defined, both LEDs flash; they are dark in the other two situations.
1.10.3 Indication of Manual Mode
Flashing Manual LED indicates that the controller is in the manual mode. The controller’s automatic
control function is disabled.
If this LED is dark and display is in the Measurement mode, the controller is in its standard control
mode or it is carrying out automatic connection configuration detection process or automatic section
power recognition process.
1.10.4 Indication of Backfeed (Power Export)
If the controller knows of the method of connection (measurement voltage and current), that is if the
automatic connection configuration detection process has been completed successfully or the method
of connection has been entered manually, the Export LED indicates the power transmission direction.
If it is dark, the power is flowing from the assumed power supply to the appliance. If the LED is lit, the
power is flowing in the opposite direction.
1.10.5 Alarm Indication
An Alarm relay can be used for non-standard events signalling. This relay’s operation can be set up
as described further below ( parameter 30 ). At Novar 10xx controllers that haven’t dedicated alarm
relay it is necessary to select and set alarm relay function first ( parameter 26 ).
The Alarm LED indicates this relay’s condition, that is if the Alarm relay’s output contact is closed, the
LED flashes.
16
Novar 1xxx
KMB systems
2. Installation
2.1 Physical
Instruments designed for a distribution board panel are mounted into a cutout of required size. The
instrument’s position must be fixed with locks.
The Novar1005D and theNovar1007D are designed for mounting on a DIN-35 bar.
Natural air circulation should be provided inside the distribution board cabinet, and in the instrument’s
neighbourhood, especially underneath the instrument, no other instrumentation that is source of heat
should be installed or the temperature value measured may be false.
2.2 Connection
To connect the controller there are connectors with screw-on terminals in the back wall. Signal pinout
on these connectors can be seen from the pictures below.
Examples of controller wiring are shown in a separate chapter.
Fig. 2.1 : Novar1114 controller – connectors
NOVAR 1106 1114 / 232 485
/
/
Serial / vers.:
Product. date :
100 ÷ 275 VAC, 7VA, 43 ÷ 67 Hz
U
IP 4X Made in Czech Republic
1
2
3
4
5
6
7
8
9
10
11 12 13 14
ALARM
k
L1
L2
L3
N
SUPPLY
l
5A
(1A)
L
max.
10A
N
100÷275 VAC
Rx Tx GND
RS 232/485
TR A B GND
LOAD
Maximum cross section area of connection wires is 2.5 square millimetres.
2.2.1 Power Supply
2.2.1.1 Standard Version Controllers
The controller requires supply voltage in the range as declared in technical specifications table for its
operation.
The supply voltage connects to terminals 3 (L) and 4 (N). In case of DC supply voltage the polarity of
connection is free. Power supply voltage needs to be externally protected ( see chapter Protection
below ).
The 12xx line controllers have power supply terminals 3 (L) and 4 (N) internally connected to terminals
5 (L) and 6 (N) which can be used to connect the power supply voltage to measurement voltage input
(terminals 7 – L and 9 – N/L).
Power supply terminal 3 (L) is internally connected to the common pole of output relays. It is
necessary to dimension the power supply protection in consideration of output contactors’ power as
well.
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Novar 1xxx
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Fig. 2.2 : Novar1214 Controller – Connectors
Serial / vers.:
/
/
Product. date :
100 ÷ 275 VAC, 7VA, 43 ÷ 67 Hz
U
IP 4X Made in Czech Republic
1
2
3
4
5
6
7
8
9
10
11 12 13 14
ALARM
k
l
L
N
L
L1
L2
L3
N
SUPPLY
N
VAC
L
L/N
58÷690 VAC
max. 100÷275
10A
5A
(1A)
max. 6A
2. TARIF
Rx Tx GND
RS 232/485
TR A B GND
max. 6A
LOAD
2.2.1.2 “/S400” Version Controllers
Controllers of the “/S400” version can be supplied with higher voltage – up to 500 V, either AC or DC.
The power demand is the same as those of standard version.
The supply voltage connects to terminals 3 (L1) and 5 (L2/N). In case of DC supply voltage the
polarity of connection is generally free, but for maximum electromagnetic compatibility grounded pole
should be connected to the terminal 5 (L2/N); see connection examples below.
Power supply voltage needs to be externally protected ( see following chapter).
Despite of standard version, power supply terminal 3 (L) is not internally connected to the common
pole of output relays. Terminals 4 and 6 are not used.
Fig. 2.3 : Novar1114/S400 Controller – Connectors
NOVAR 1106 1114 / S400 / 232 485
/
/
Serial No / Fw. vers.:
Production date :
75 ÷ 500 V AC, 7 VA, 43 ÷ 67 Hz
U
IP 4X
1
2
3
4
5
6
7
Made in Czech Republic
8
9
10
11 12 13 14
ALARM
k
L1
L2
L3
N
SUPPLY
l
5A
(1A)
L1
L2/N
max.
500
VAC
Rx Tx GND
RS 232/485
TR A B GND
1A
LOAD
2.2.1.3 Novar 1005 / 1007 Controllers
The supply voltage connects to terminals 4 (L1) and 3 (N). Power supply voltage needs to be
externally protected ( see chapter Protection below ).
Power supply terminal 4 ( L1 ) is internally connected to the common pole of output relays. It is
necessary to dimension the power supply protection in consideration of output contactors’ power as
well.
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Novar 1xxx
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Fig. 2.4 : Novar 1007 Controller – Connector
NOVAR 1005 1007
U~ 80÷275VAC,43÷67Hz
Příkon 5 VA
(7) (8)
(1007)
2.2.1.4 Novar 1005D / 1007D Controllers
The power supply is connected to terminals 16 (L1) and 18 (N). Power supply voltage needs to be
externally protected ( see chapter Protection below ).
Despite of 1005 / 1007 models, power supply terminal is not internally connected to the common pole
of output relays.
Fig. 2.5 : Novar 1007D Controller
Power Factor Controller
0.98
1
2
3
4
5
1: Target cos ϕ
16: Aut.conn.detect.
2: Contr. ti me ind. 20: Aut.step recogn.
3: Contr. ti me cap. 25: Steps values
12,13: CT-ratio
30: Alarm setting
14: Reconn. time
40: Alarm state
6
7
8
Al arm States: 9: Comp. error
1: I <
10: Export
2: I >
11: Switch No.
3: U <<
12: Step error
8: CHL >
13: Temp. >
2.2.1.5 Protection
Article 6.12.2.1 in the EN 61010-1 standard requires that instrument must have a disconnecting device
in the power supply circuit (a switch — see installation diagram). It must be located at the instrument’s
immediate proximity and easily accessible by the operator. The disconnecting device must be marked
as such. A circuit breaker for nominal current of 10 amp makes a suitable disconnecting device, its
function and working positions, however, must be clearly marked (symbols “0” for power off and “I” for
power on in accordance with EN 61010–1).
Since the controller’s inbuilt power supply is of pulse design, it draws momentary peak current on
powerup which is in order of magnitude of amperes. This fact needs to be kept in mind when selecting
the primary protection devices.
2.2.2 Measurement Voltage
2.2.2.1 11xx and 10xx Line Controllers
The power supply voltage is used as measurement voltage in 11xx line controllers and it is not thus
necessary (or possible) to connect measurement voltage independently.
2.2.2.2 12xx Line Controllers
The 12xx Line Controllers feature a general-purpose, galvanic-isolated voltage measurement input. It
allows to connect measurement voltage in the range from 45 to 760 V AC at the frequency range 43
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Novar 1xxx
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to 67 Hz of either phase or line voltage. In basic connection phase L1 goes to terminal L (7) and
neutral wire to terminal N/L (9).
The measurement voltage must be protected externally. If the measurement voltage is identical with
power supply voltage, they can share a circuit breaker. Otherwise each voltage branch must be
protected with fuses or circuit breakers of nominal value 1 to 6 A.
If the measurement voltage is connected via a metering voltage transformer, you have to enter the
transformer turns ratio in instrument setup (parameter 17 – see further below) for correct expression of
measurement values displayed.
2.2.3 Measurement Current
A metering current transformer of nominal output current 5 or 1 A can be used – the metering current
transformer’s ratio must be entered when setting up the instrument for proper measured values
display (parameters 12, 13 – see further below).
2.2.3.1 Novar 11xx / 12xx / 13xx Controllers
Metering current transformer (CT) outputs connect to terminals 1 (k) and 2 (l). At 10xx line controllers,
connection polarity is opposite : terminal 1 is l and terminal 2 is k.
The connector features a screw lock to prevent accidental pull-out.
2.2.3.2 Novar 10xx Controllers
At 1005/1007 controllers, connect a metering current transformer (CT) outputs to terminals 1 (k) and 2
(l).
At 1005D/1007D controllers, terminal numbers are 6 (k) and 7 (l).
2.2.4 Error Indication
2.2.4.1 Novar 11xx / 12xx / 13xx Controllers
The instrument has an auxiliary Alarm relay to indicate nonstandard conditions. This relay’s contact
goes to terminals 17 and 18.
2.2.4.2 Novar 10xx Controllers
Non-standard events can be signalled by one of last two output relays (if they are not used for control).
It is necessary to set such relay function properly, see parameter 26.
2.2.5 Output Relays
The instrument has 6, 8 or 14 output relays (depending on controller model). The relays’ output
contacts are internally wired with varistors.
2.2.5.1 Standard Version Controllers
The relays’ contacts go to terminals 19 through 32.
The relays’ common contacts are internally connected to power supply terminal L ( No. 3 ). When an
output relay contact closes, power supply voltage appears at the corresponding output terminal.
2.2.5.2 “/S400” Version Controllers
The relays’ contacts go to terminals 19 through 32.
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Despite of standard version, the relays’ common contacts are connected to additional terminals 33,
34.
In case of DC voltage for supplying of contactors, installation of suppression 2A/600V diodes directly
at contactors´s coils is strongly recommended. Furthermore, note lower maximum current load of the
controller outputs at such case ( see technical parameters table).
2.2.5.3 Novar 10xx Controllers
The Novar1005 and Novar1007 relays’ contacts go to terminals 5 through 12. The relays’ common
contacts are internally connected to power supply terminal L ( No. 4 )
At the Novar1005D and Novar1007D models, the relays’ contacts go to terminals 20 through 27. The
relays’ common contacts are connected to additional terminal RC ( No. 19 ), that is isolated from
power supply terminals.
In installation there may be a need to test function of each compensation section by manual
connection and disconnection — this can be done in the Manual mode or using manual intervention in
control process (see further below).
2.2.6 Second Metering Rate, External Alarm
In some situations it may be suitable to operate the controller with two different settings, for example
depending on load characteristics in different daily or weekly zones. To select the setting desired,
there is the second metering rate input.
WARNING !!! This input is not galvanically isolated from the controller’s internal circuitry and
its terminals constitute exposure to hazardous voltage against the ground potential! It is
therefore necessary for the relay, switch or optocoupler, driving the input, to be isolated (no external
voltage) and to be located as close to the controller as possible (optimally in the same cabinet) to
minimize the lead length (maximum about 2 to 3 metres). The input is connected to terminals 11 and
12. The input’s internal power supply voltage is about 30 V DC, switching current about 5 mA.
If the second metering rate active device is a transistor (NPN) or optocoupler, it is necessary to
observe the connection polarity – transistor or optocoupler collector to go to terminal + (11) and
emitter to terminal – (12).
When the input is open, the controller operates with the basic metering rate setting, when it is closed
(if the second metering rate function is enabled – see further below), it operates with the second
metering rate setting.
If second metering rate function is switched off, the second metering rate input can be used for
external alarm signal – see description of parameters 30, 40.
Only 12xx and 13xx line controllers feature the second metering rate selection input.
2.2.7 Communication Interface
The 11xx / 12xx / 13xx / 14xx controller models can be equipped with galvanically isolated
communication interface in compliance with RS-485 or Ethernet specification for remote setup and
control process monitoring.
The 10xx controller models has not this option.
2.2.7.1 RS-485 Communication Interface
Signal-to-pin configuration for RS-485 type line is shown in Tab. 2.2.
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Novar 1xxx
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Table 2.2: communication line signal configuration
signal
TR
DATA A
DATA B
GND/C
terminal
13
14
15
16
The interface allows connecting up to 32 instruments at a distance up to about 1 kilometre.
Recommended cable is shielded twisted metallic double pair. Use one pair for DATA A and DATA B
signals and the second pair for GND/C signal interconnection.
RS-485 line requires impedance termination of the final nodes by installing terminating resistors for
communication distances of a few tens of metres and longer. Terminating resistors matching the
cable’s wave impedance are connected between terminals 14 and 15 (DATA A and DATA B). The
instrument has a built-in terminating resistor of 330 ohms. It is connected between DATA B-signal
(terminal 15) and TR-terminal (13) inside the instrument. To install the resistor, simply interconnect
terminals DATA A (14) and TR (13).
If the communication cable is hundreds of meters long and in environments with electromagnetic
noise it is suitable to use shielded cable. The shielding connects to the PE (protection earth) wire at
one end of the cable.
2.2.7.2 Ethernet (IEEE802.3) Interface
Using this interface the instruments can be connected directly to the local computer network (LAN).
Instruments with this interface are equipped with a corresponding connector RJ- 45 with eight signals
(in accordance with ISO 8877), a physical layer corresponds to 10/100 BASE- T.
Type and maximum length of the required cable must respond to IEEE 802.3. Each instrument must
have a different IP- address, preset during the installation.
Physically, the interface is created with embedded Ethernet-to-serial converter ES01. Setup of the
module can be found in application handbook ES01 Embedded Ethernet to Serial Link Converter that
is available on www.kmbsystems.eu .
Fig. 2.6 : Controller with Ethernet Interface Rear Panel
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Novar 1xxx
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3. Putting in Operation
3.1 First Use
The controller comes preset to default values as shown in Table 4.1.
On powerup, display test runs first. The display momentarily shows
• type of controller (e.g. N214)
• firmware version (e.g. 1.2)
• type of measurement voltage set (U=LN or U=LL)
• metering current transformer secondary side nominal value set (I=5A or
I=1A)
If the measurement voltage connection is correct, the automatic connection configuration detection
process starts.
If no measurement voltage is detected, U=0 will flash on the display.
3.2 Automatic Connection Configuration Detection Process
The controller’s default measurement voltage and current connection parameters are set as follows:
• type of measurement voltage set to phase voltage (“LN”, parameter 15)
• method of connection of U and I not defined (parameter 16)
• compensation system nominal voltage UNOM set to 230 V (parameter 18)
If the method of connection is not defined, the controller cannot evaluate instantaneous power factor
and this condition is indicated by both trend LEDs flashing simultaneously. In such an event, the
controller carries out automatic connection configuration detection process.
For the controller to be able to carry out this automatic connection configuration detection process, the
following conditions must be met:
• controller operation is not disabled (i.e. the Manual LED is dark)
• controller is in the control mode, i.e. the numeric display mode is Measurement
• measurement voltage of the minimum value required is connected
If meeting the three above conditions, the controller starts the automatic connection configuration
detection process.
The process may have up to seven steps. The controller makes four measuring attempts in each step
in which it consecutively connects and disconnects sections 1 through 4. It, at the same time,
assumes that power factor capacitors are connected to at least two of the sections (if any choke
connected to sections 1 through 4, detection process fails). The two following messages are shown,
one after another, in each measurement attempt on the numerical display:
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Novar 1xxx
KMB systems
1. step number in format
2. attempt result, e.g.
APnn (Automatic Phase detection, nn... attempt number)
L1-0 (see Table 4.4 for connection methods)
If the controller measures identical values repeatedly in each attempt, it considers the connection
detected and quits carrying out further steps. If the measurement results are different from each other
in a particular step, the controller carries out another measurement step.
The following conditions must be met for successful automatic connection configuration detection
process:
• type of measurement voltage is set correctly (phase, “LN” or line, “LL” – parameter 15)
• at least two power factor capacitors are connected to sections 1 through 4 and no power
factor choke is connected to these sections
The controller measures the measurement voltage value for the whole of the automatic connection
configuration detection process. It evaluates this voltage’s average value at the end of the process
and selects the compensation system nominal voltage UNOM (parameter 18) as the nearest value of
the following choice of nominal voltages.
Table 3.1: choice of nominal voltages
58 V
100 V
230 V
400 V
500 V
690 V
Type of connection detected is shown on the numeric display for a moment after successful
completion of the automatic connection configuration detection process, the selected UNOM nominal
voltage, the true power factor value in the power system, and thereafter the instrument starts the
control process or it starts the automatic section power recognition process (see further below).
If the automatic connection configuration detection process is not completed successfully, the numeric
display shows flashing P=0. It is, in such a case, necessary to enter the type of connection manually
or to re-enter ---- (= not defined) in editing parameter 16 and thus restart the automatic connection
configuration detection process. Otherwise the controller changes over to a waiting mode and it
repeats the automatic connection configuration detection process in 15 minutes automatically.
If the actual nominal voltage in the compensation system differs from the value selected and entered
in parameter 18 in the automatic connection configuration detection process, the parameter can be
corrected to its actual value when the process has finished.
The automatic connection configuration detection process can be interrupted at any time by switching
the numeric display mode to Parameters. The automatic connection configuration detection process
will start again from scratch on return to instantaneous value display mode.
3.3 Automatic Section Power Recognition Process
The controllers come with enabled function of automatic section power recognition process (parameter
20 set to A) as default setting. The controller starts the automatic section recognition power process
on powerup (connection of power supply voltage) with this setting, provided none of the outputs (in
parameter 25) has a valid power value; this happens if a new controller is installed for the first time or
after its initialization). The process can also be started without interrupting the power supply voltage
connection, by editing parameter 20 to value 1 or by controller initialization (see further below).
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Novar 1xxx
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For the controller to be able to start the automatic section power recognition process, the following
conditions must be met:
• controller automatic operation is not disabled (i.e. the Manual LED is dark)
• controller is in control mode, i.e. the numeric display mode is Measurement
• measurement voltage, at minimum value required, is connected
• connection mode of measurement U and I is defined (parameter 16)
If these conditions are met, the controller starts the automatic section power recognition process.
The process may have three or six steps. The controller consecutively connects and disconnects each
output in each step. While doing that, it measures the effect of connection and disconnection on total
reactive power in the power system. From the values measured the power of each section is
determined.
The following messages are shown one after another in each measurement attempt on the numeric
display:
1. Step number in format AC-n (n... step number).
2. Sectional power measured in kvars; the nominal power value of the section under
measurement is displayed, that is the value that corresponds to nominal voltage UNOM of
the compensation system as specified in parameter 18. If the metering current
transformer turns ratio has been entered (parameters 12 and 13), or, if measuring voltage
via a metering voltage transformer, the voltage transformer’s turns ratio as well (in
parameter 17), sectional power in the power system is shown (that is at the metering
current transformer primary side, or metering voltage transformer primary side). If the
metering current transformer primary side (parameter 12), or metering voltage transformer
primary side (parameter 17) is not defined, sectional power in the metering current
transformer’s, or the metering voltage transformer’s, secondary side is shown.
If the controller does not succeed in determining a section’s value, it does not show it. This condition
occurs if reactive power value in the power system fluctuates considerably due to changes in load.
After carrying out three steps, evaluation is carried out. If each measurement in the steps carried out
provides sufficiently stable results, the automatic section power recognition process is completed.
Otherwise the controller carries out three more steps.
A requirement for successful automatic section power recognition process is sufficiently stable
condition of the power system – while connecting or disconnecting a section, the reactive load power
must not change by a value which is comparable with, or even greater than, the reactive power value
of the section under test. Otherwise the measurement result is unsuccessful. As a rule of thumb, the
section values are recognized the more precisely, the lower the load is in the power system.
On successful completion of automatic section power recognition process, the controller checks
whether at least one capacitive section has been detected and, if so, it starts control. Otherwise the
controller goes to the waiting mode and after 15 minutes it starts the automatic section power
recognition process again.
Each section value recognized can be checked in the side branch of parameter 25. A positive power
value means a capacitive section, negative value means inductive section. If the value could not be
recognized, “----” is shown. Each value recognized can be edited manually.
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Novar 1xxx
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If the automatic section power recognition process can not be completed successfully or none of the
sections recognized is capacitive, flashing C=0 is shown on the numeric display and the Alarm
signal is activated at the same time. In such an event, it is necessary to enter each section’s value
manually (see description further below) or by editing parameter 20 enter value 1 (= carry out the
automatic section recognition power process) and thus force another start of the automatic section
power recognition process. Then do not forget to set the value back to
A
!!!
The automatic section power recognition process can be stopped any time by switching the display
mode to Parameters. On return to the instantaneous value display mode the automatic section power
recognition process will be started over again.
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Novar 1xxx
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4. Operation
4.1 Setup
To achieve optimum compensation in accordance with character of the load controlled, the controller
has a number of parameters that govern its operation. Table 4.1 shows a list of the parameters. The
following chapters describe each parameter, its meaning and how it can be edited.
4.1.1 Editing Parameters and Clearing Recorded Measurement Values
4.1.1.1 Parameter Editing
The controller’s parameters are set to default values, which are shown in Table 4.1, when shipped.
To achieve optimum compensation results, it is sometime necessary to change some of the values in
correspondence with particular requirements; in the other situations it is at least necessary to enter the
measurement voltage type (phase or line) and current transformer turns ratio, within installation of the
instrument.
If parameter edit is enabled (see next chapter), you should proceed as follows:
1. Switch controller to parameter display mode by pressing button P ( for Novar-11xx models
only ).
2. Find parameter you want to edit by pressing the ▲, ▼ buttons repeatedly.
3. Press button P ( ►) and hold it down until the display starts flashing.
4. Release button P ( ►) and set the value desired with the ▲, ▼ buttons. Some values
can be incremented or decremented continuously by holding down the ▲or ▼ button.
5. When the value desired is displayed, press button P ( ►). The value will be saved in the
controller’s memory, the display stops flashing and editing is thus complete.
4.1.1.2 Clearing Recorded Measurement Values
Recorded measurement values specified in Chapter 1 can be cleared in an analogous way:
1. Switch the controller to the measurement value display mode ( for Novar-11xx models
only ) and scroll to the value you want to clear using the ▲, ▼ and M ( or ▲, ▼ and
► for Novar-10xx models ) buttons.
2. Press the M ( ► ) button and hold it pressed until the displayed value starts flashing.
3. Release the M ( ► ) button and by pressing the ▲or ▼ button change display to show
CLr
(= clear). The following press of the M ( ► ) button will clear the value.
Clearing a value clears all the other values in its group and starts over their evaluation.
4.1.1.3 Enable / Disable Parameter Edit
When shipped, the controller has the Parameter Edit feature enabled, that means the parameters can
be edited freely on power supply voltage connection as desired. After being put in operation,
Parameter Edit can be disabled to protect the controller against unauthorized changes to its mode of
operation.
To see if Parameter Edit is disabled or enabled, check parameter 00. It can contain the following:
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Novar 1xxx
KMB systems
Ed=0 ......… edit disabled
Ed=1 ......… edit enabled – parameters can be edited, recorded measurement values can
be cleared
If Parameter Edit is locked, you can unlock it using the following procedure, which is similar to editing
the controller’s parameters:
1. Switch controller to parameter display mode by pressing button P to display parameter 00 ( or
list with buttons ▼, ▲to parameter 00 for Novar-10xx models ) - Ed=0 is displayed
(controller must not be in the Manual mode).
2. Press button P ( ► ) and hold it down until the last character on the display starts flashing. A
digit between 0 and 9 will be shown on the last digit position. As an example you can imagine
5 is displayed so the display shows Ed=5 with the 5 flashing.
3. Press the following sequence: ▼, ▲, ▲, ▼. If 5 was shown as the last display digit, it
would change to
4 - 5 - 6 - 5, so the same value is shown at the end as at he beginning.
4. Press button P ( ► ). The display will show Ed=1, indicating correct password and
enabled Parameter Edit while clearing recorded measurement values.
The digit shown while entering the unlocking keypress sequence is random generated by the
controller and it is not important for its correctness (it is there only to confuse). Only the sequence of
buttons pressed is important.
Parameter Edit mode is enabled until it gets disabled by the operator. Parameter Edit enabled or
disabled conditioned is retained in the instrument even on power off.
Parameter Edit can be disabled in a way analogous to enabling it but you press buttons different from
the correct unlocking keypress sequence.
4.1.2 Parameter 01/07 – Target Power Factor
The value of target power factor for metering rate 1 (parameter 01) or metering rate 2 (parameter 07)
can be specified in the range from 0.80 lag to 0.80 lead.
If a more precise setting is required around power factor equal to 1.00, you can specify the phase shift
angle from +10 to –10 degrees instead of the power factor value. The phase shift angle setting mode
is scrolled to by pressing the ▲ key while editing the parameter until the phase shift angle value
o
required is displayed, which is marked with a degree symbol, for example 10 means +10°.
If the parameter is specified as a phase shift angle in degrees, the bandwidth on high loads is
displayed in degrees too (see parameter 04/10 further below).
If the decimal point in the power factor value is blinking, it means that offset control is activated (see
parameter 63).
4.1.3 Parameter 02/08 – Undercompensation Control Time
The value for metering rate 1 (parameter 02) or metering rate 2 (parameter 08) can be specified in the
range from 5 seconds to 20 minutes: 0.05 - 0.10 - 0.15 - 0.20 - 0.30 - 0.45 -1.0 - 1.30 - 2.0 - 3.0 - 4.0 5.0 - 7.0 - 10.0 - 15.0 - 20.0 (the number before decimal point specifies minutes, that after decimal
point specifies seconds). The value specifed determines the frequency of control interventions under
the following conditions:
• instantaneous power factor is more inductive than the value required –
undercompensated
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Novar 1xxx
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• the difference between reactive power instantaneous value in the power system and
optimum value, which corresponds to the target power factor setting (= control deviation),
is just equal to the smallest section power (C/kMIN)
If the parameter value is set to say 3.0 and the above mentioned conditions are met in the power
system, the controller calculates optimum compensation and carries out control intervention every 3
minutes.
The time mentioned gets shorter in proportion to the instantaneous control deviation. If control time
without preceding character “L” is set, it gets shorter as square of control deviation over the smallest
section value (C/kMIN). If the control time with preceding character “L” is specified, it gets shorter in
proportion to this ratio (“L” = Linear, causes slower response to large deviations). Rising control
deviation can decrease this value to the minimum control time of 5 seconds.
On the contrary, if the control deviation is smaller than the smallest section power (C/kMIN), control time
gets twice as long. If the control deviation falls further under half of the smallest section power value
(C/kMIN), no control interventions take place.
4.1.4 Parameter 03/09 – Overcompensation Control Time
The value for metering rate 1 (parameter 03) or for metering rate 2 (parameter 9) determines the
frequency of control interventions, very much like in parameter 02/08 described above. There is
a difference though: it only applies if the instantaneous power factor is more capacitive than that
required, that is it is overcompensated.
The control time operation in proportion to control deviation magnitude is the same as with parameter
02/08 described above.
4.1.5 Parameter 04/10 – Control Bandwidth on High Loads
Using this parameter you can specify the control bandwidth on high loads (see Figure 4.1). The value
entered specifies the range of reactive power in the C zone which constitutes condition considered as
compensated, making the controller stop control interventions.
Figure 4.1: Standard Control Bandwidth
power factor specified
active
power
(+)
+0,005
instantaneous
power
vector
-0,005
C
control bandwidth
B
A
reactive
power
(L)
On low loads (zone A) and on medium loads (zone B), the control bandwidth is constant and
corresponds to the C/kmin value – the band follows the power factor slope specified at width
± (C/kMIN)/2. On high loads (zone C) the bandwidth increases so its limits correspond to adjustable
deviation from the target power factor. The standard bandwidth value in this zone is 0.010 or ± 0.005
– this condition is shown in Figure 4.1. If thus, for example, the target power factor is specified as
0.98, reactive power corresponding to power factor from 0.975 to 0.985 will be considered
compensated condition in zone C.
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Novar 1xxx
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Table 4.1: Novar10xx/11xx/12xx Controller Parameters
#
name
0
1
parameter edit enable/disable
target power factor (metering rate
1)
control time when
undercompensated (metering
rate 1)
control time when
overcompensated (metering
rate 1)
control bandwidth
offset power
0/1
0.80 L ÷ 0.80 C
—
0.01
1
0.98 L
see Enable / Disable Parameter Editing
5 sec ÷ 20 min
—
3 min
No “L”: control time reduction by squared
proportion
“L”: linear control time reduction.
5 sec ÷ 20 min
—
30 sec
No “L”: control time reduction by squared
proportion
“L”: linear control time reduction
0.000 ÷ 0.040
(0.001 ÷ 5.5 kvar)
x CT ratio x VT
ratio
0.005
0.001
0.010
0
metering rate 2 enable/disable
like parameters 1 ÷ 5, but for
metering rate 2
0–1–E
the same as
parameters 1 ÷ 4
—
—
0
—
5 ÷ 9950 A
5
none
1A÷5A
—
5
5 sec ÷ 20 min
LN (phase) – LL
(line)
—
—
20 sec
LN
—
—
none
--- (no VT)
18 compensation system nominal
voltage UNOM
6 combinations
no VT or 10 ÷
5000
50 ÷ 750 V x VT
turns ratio
—
230 / 400 V
20 automatic section power
recognition process
21 switching program,
linear switching mode
A (auto) – 0 (no) – —
1 (yes)
12 typical
—
combinations or “L“
2
3
4
5
6
7
÷
11
12
metering current transformer
primary side nominal value
13 metering current transformer
secondary side nominal value
14 reconnection delay time
15 measurement voltage type –
phase-neutral or phase-phase
16 method of connection of U and I
17 VT turns ratio
range
step
default
none
0.001
none
23 number of capacitors
1 ÷ 14
—
6 / 8 / 14
25 sectional nominal power
(0.001 ÷ 5.5 kvar)
x CT ratio x VT
ratio
0.001
none
26 fixed sections
regulated or
—
0/1/F/H/A
0.80 lag to 0.80
0.01
lead / S
0 / indication only / —
actuation only /
indication and
actuation
30
Value corresponds to UNOM specified
(parameter 18) ; positive for capacitive,
negative for inductive values. Displayed
when parameter 63 is active only.
not shown unless metering rate 2 is
enabled
This parameter’s correct setting is
essential for automatic connection
configuration detection process.
see parameter description
VT nominal primary to secondary voltage
ratio
controller establishes this value within
automatic connection configuration
detection process; připojení; in [V] as
default; in [kV] when VT-ratio (par.17) is
defined
A
22 smallest capacitor nominal power (0.007 ÷ 1.3 kvar)
(C/k value calculated for metering x CT ratio x VT
current transformer primary side) ratio
27 power factor limit for
compensation by choke
30 alarm setting
comment
all regulated
0 means individual section setting. Not
shown if automatic section power
recognition process is enabled.
Value corresponds to UNOM specified
(parameter 18)
Not shown if automatic section
recognition is enabled.
Not shown if automatic section power
recognition process is enabled.
Value corresponds to UNOM specified
(parameter 18)
positive for capacitive sections (lead),
negative for chokes (lag)
„F“,/ „H“ / „A“ for 2 highest sections only
„A“ for Novar 1005 / 1007 only
none
No compensation by chokes takes place
unless this parameter is specified.
indication and
actuation from
undercurrent,
voltage signal
absence or
section error
1... undercurrent
2... overcurrent
3... loss of voltage
4... undervoltage
5... overvoltage
6... THDI >
7... THDU >
8… CHL >
9… compensation
error
10… export
11… no. of
connections >
12… section error
13… overheated
14… external alarm
Novar 1xxx
31 alarm thresholds: undervoltage,
÷ overvoltage, THDI, THDU, CHL,
37 number of connections and
temperature
40 alarm instantaneous condition
43 section connection time (in
thousands of hours)
44 number of section connections
(in thousands)
45 instrument failure condition
46 instantaneous condition of
control time
50 instrument address
KMB systems
—
—
—
Ranges and units as in Table 4.7
not displayed if the alarm not set up
Indicates current state of alarm.
display range 0.001 to 130
display range 0.001 to 9999
time until next control intervention in
seconds
irrelevant for Ethernet interface
instruments
1
1
51 communication rate
—
9600
52
—
KMB(P0)
—
A (auto)
—
7 days
applies to average values of Acos, APac,
APre
—
15 minutes
applies to these minimum and maximum
values: mincos, maxPac, maxPre,
maxdPre
55
56
57
1 ÷ 255
4800 – 9600 –
19200 Bd
communication protocol
KMB(P0) /
Modbus-RTU(P1)
power system frequency
A (auto) – 50 Hz –
60 Hz
average value evaluation moving 1 minute ÷ 7 days
window size
minimum and maximum value
1 minutes ÷ 7
evaluation moving window size
days
58 Celsius/Fahrenheit temperature
display mode
59 cooling enable threshold
°C – °F
—
°C
+10 ÷ +60 °C
1 °C
+40 °C
60 heating enable threshold
-30 ÷ +10 °C
1 °C
-5 °C
63 offset control
0 (no) - 1 (yes)
-
0
not displayed if cooling output not
specified
not displayed if heating output not
specified
The control bandwidth can be increased to 0.040 or decreased to 0.000. Control bandwidth increase
may especially be useful in systems with large control range – avoiding uselessly precise control on
high loads reduces the number of control interventions which results in longer contactor service life. If
the parameter values is decreased to 0, the control bandwidth corresponds to value C/kmin (constant,
not widening).
Note: On low loads, the control bandwidth is “bent” (zone A) to prevent undesired overcompensation
(the illustration is a simplification).
If the target power factor (parameter 01/07) is specified in degrees as phase shift angle, the bandwidth
on high loads is also displayed in degrees.
4.1.6 Parameter 05/11 – Offset Power
These parameters are meaningful when offset control is activated only (see parameter 63). Unless
this control mode is active, they do not appear.
The parameters specify nominal value of the offset (three-phase) reactive power for metering rate 1
(parameter 05), respectively for metering rate 2 (parameter 11). Like the section powers in parameter
25, their values in kvars correspond to nominal three-phase power (i.e. at voltage corresponding to the
preset compensation system nominal voltage UNOM in parameter 18 ). The actual value of the offset
power is, as well as for capacitor and choke powers, dependent on the actual network voltage.
The value is entered in the same manner as compensation section powers – capacitive offset power
as positive and inductive offset power as negative.
31
Novar 1xxx
KMB systems
So if, for example, an offset control is required due to a front-end capacitor, you must specify positive
offset power value. The controller will then intentionally undercompensate at its connection node just
by the size of the specified offset power value.
4.1.7 Parameter 06 – Metering Rate 2 Operation
The Novar controllers feature two sets of the above described control parameters.
Parameter 6 decides if the control process uses the first set of basic control parameters, 1 through 4,
only or if, under certain circumstances, the second set of parameters, 7 through 10 (metering rate 2) is
used as well.
By default parameter 6 is set to 0 and only parameters 1 through 4 of the parameters described
above are applied; parameters 7 through 10 are not significant in such an event, so they are not
shown.
Novar1206/1214 controllers allow changing the above described basic control parameters while
compensation is in progress, triggered by external signal (relay contact). They have a metering rate 2
request input for this operation, to which an insulated contact or optocoupler can be connected. If you
set the parameter to1, the controller will start evaluating metering rate 2 requests and, depending on
the input’s instantaneous condition, use parameters 1 through 4 or 7 through 10.
The decimal point after the last character then indicates whether metering rate 2 request is active. If it
is dark, metering rate 2 request is not active and only parameters for metering rate 1 apply. On the
contrary, lit decimal point indicates active metering rate 2 request and the controller uses parameters
specified for metering rate 2.
The metering rate 2 function can further be set to value E. In this event the second set of control
parameters is used for active power export, that is if active power flows from appliance to source.
4.1.8 Parameters 12,13 – Metering Current Transformer (CT) Ratio
You can specify metering current transformer nominal primary value in amperes using parameter 12.
The value range is from 5 to 9950.
This parameter (12) is not specified (---- shown) by default. With this setting, all values that are
current- or power- related , that is measured values of instantaneous effective, active and reactive
currents and power, and further the C/kMIN value (parameter 22) and power in each section (parameter
25), are shown in the magnitude to which they are transformed at the metering current transformer
secondary side. The parameter’s value specified does not affect the controller’s control operation, it
only affects displayed values that are related to current or power. Therefore the value may be
specified later, after the automatic section power recognition process, without having to start this
process again.
Parameter 13 selects metering current transformer nominal secondary current. You can choose from
5A and 1A. Warning!!! Unlike parameter 12, this parameter must be set correctly for controller’s
proper operation! The controller determines whether the current input is overloaded evaluating this
parameter and instantaneous current value. The controller may stop operation undesirably or,
contrariwise, this operation disablement will not work when it should (see description of parameter 30,
alarm from overcurrent).
Parameter 13 setting will be kept even on controller initialization (see description further below).
4.1.9 Parameter 14 – Reconnection Delay Time
It is used to ensure sufficient discharge of a capacitive section prior to reconnection. It can be set in
range 5 seconds to 20 minutes to one of the values 0.05 - 0.10 - 0.15 - 0.20 - 0.30 - 0.45 -1.0 - 1.30 2.0 - 3.0 - 4.0 - 5.0 - 7.0 - 10.0 - 15.0 - 20.0 . The format is the same as in parameters 2 and 8.
32
Novar 1xxx
KMB systems
4.1.10 Parameters 15, 16 – Type of Measurement Voltage and Connection
Configuration
Parameter 15 determines if the measurement voltage connected is phase (phase-neutral,
U=LN,
default value) or line (phase-phase, U=LL). If the measurement voltage is connected to the power
supply transformer’s side which is opposite to measurement current connection, the connection
configuration value must be set in accordance with transformer type – see description in a separate
chapter further below.
Connection configuration parameter must definitely be set correctly in installation, even if
automatic connection configuration detection process is assumed to take place. Otherwise the power
factor measured will be evaluated with errors!
If the parameter value is specified as phase voltage (U=LN), the controller also presets the
compensation system’s nominal voltage value UNOM (parameter 18) to 230 V. If the parameter value is
specified as line voltage (U=LL), the UNOM (parameter 18) is preset to 400 V.
The connection configuration parameter (15) value set will be kept even on controller initialization (see
description further below).
Parameter 16 determines the method of measurement voltage connection with respect to
measurement current, that is between which phases or phase and neutral wire the measurement
voltage is connected. It is assumed that the metering current transformer is in phase 1 and its
orientation (terminals k, l) corresponds to real orientation supply –> appliance. The method of
connection is specified as one of six combinations shown in Table 4.2.
Table 4.2: Measurement voltage connection
phase measurement voltage -U=LN
#
1
2
3
4
5
6
connection
line measurement voltage - U=LL
#
1
L1-0
L2-0
L3-0
0-L1
0-L2
0-L3
2
3
4
5
6
connection
L1-L2
L2-L3
L3-L1
L2-L1
L3-L2
L1-L3
Notes:
•
It is assumed that the metering current transformer is in phase 1 and its orientation (terminals
k, l) corresponds to real orientation supply –> appliance.
•
The method of connection is shown as x–y where x represents the phase connected to
controller’s terminal L and y represents the phase connected to controller’s terminal N/L (0
represents the neutral wire).
If the method of connection value is entered as not specified (---- value), the automatic connection
configuration detection process is started, with exception of case when linear switching mode ( see
parameter 21) is set. In such case the process is not started and it is necessary to set the method of
connection manually.
If the type of connection (phase or line, parameter 15) is changed, the method of connection
(parameter 16) is automatically set to the unspecified value.
33
Novar 1xxx
KMB systems
4.1.10.1 Setting Type of Connection Configuration if Measuring at Power Supply
Transformer’s Opposite Sides
If the measurement current signal is from the power supply transformer’s side which is opposite to
measurement voltage signal side, the transformer phase angle is conclusive for correct parameter 15
setting. This value specifies the angle between voltage vectors of corresponding phases at primary
and secondary sides. The transformer phase angle can be in the range from 0 to 11, corresponding to
phase angles from 0 to 330 degrees (in steps of thirty degrees).
Provided the measurement voltage signal is connected in accordance with the type of transformer
(that is phase measurement voltage is connected to controller with wye, or star, connection or line
measurement voltage with delta connection), it is necessary to set phase type of connection with
even transformer phase angle value and line type of connection with odd transformer phase angle
value.
If the measurement voltage signal is connected in disaccordance with the type of transformer, the
opposite rule applies: line connection with even transformer phase angle or phase connection with
odd transformer phase angle.
Determining parameter 15 explained in practical examples:
Example 1:
Compensation is to be provided for consumption supplied via a Dy1 transformer while line
measurement voltage will be taken from its primary side (D stands for delta connection) and
measurement current signal from a metering current transformer at the power supply transformer’s
secondary side (y stands for wye, or star, connection).
determining type of connection (parameter 15):
1. The transformer’s primary side is delta-connected and line primary voltage will be connected
to the controller (usually via a metering voltage transformer with nominal output voltage 100 V
AC) — this means the measurement voltage will be connected in accordance with the type
of transformer.
2. Since the measurement voltage is connected in accordance with the type of transformer and
the transformer phase angle (1) is odd, you set the type of measurement voltage connection
configuration to line. (If the transformer phase angle was even or if the measurement voltage
was not connected in accordance with the type of transformer, you would specify phase
connection configuration).
Example 2:
Compensation is to be provided for consumption supplied via a Yy6 transformer while the line
measurement voltage will be taken from its secondary side (y stands for wye, or star, connection) and
measurement current signal from a metering current transformer at the power supply transformer’s
primary side (Y stands for wye, or star, connection again).
determining type of connection configuration (parameter 15):
1. The transformer’s secondary side is wye-connected, but the line secondary voltage will be
connected to the controller — this means the measurement voltage will be connected in
disaccordance with the type of transformer.
2. The measurement voltage is connected in disaccordance with the type of transformer and
the transformer phase angle (6) is even, so you set parameter 15 to line. (If the
measurement voltage was connected in accordance with the type of transformer, you would
set phase connection).
34
Novar 1xxx
KMB systems
If in doubt about correctness of determining the type of connection, experimental validation is
convenient: after automatic connection configuration detection process you can usually compare the
power factor value shown by the controller with information on the billing electricity meter (ratio of
revolutions of active and reactive electricity meters). If in discrepancy, you have to set the type of
connection configuration to the other value and repeat the validation test.
4.1.11 Parameter 17 – Metering Voltage Transformer (VT) Turns Ratio
This parameter allows specifying the voltage transformer turns ratio from 10 to 5000 or it can be set as
unspecified.
Parameter is unspecified by default: “--- “ is displayed. In this event it is assumed that the
measurement voltage is connected directly. Measurement voltage values are then displayed in volts.
If the measurement voltage is connected via a voltage transformer, its turns ratio can be specified in
this parameter (example: if a voltage transformer with conversion 35kV/100V is used, 350 is entered).
If no voltage transformer turns ratio is specified, all voltage and power measurement values as well as
UNOM (parameter 18), C/kMIN (parameter 22), and each section’s power (parameter 25) displayed as
transformed to the voltage transformer’s secondary side. If the voltage transformer turns ration is
specified correctly, the aforementioned values are displayed as values corresponding to the voltage
transformer’s primary side and voltages are shown in kilovolts.
The value specified in parameter 17 does not affect the controller’s control operation in any way; it
only affects displayed values that are voltage or power. Therefore the value may be specified later,
after the automatic section power recognition process, without having to start this process again.
4.1.12 Parameter 18 – Compensation System Nominal Voltage (UNOM)
Parameter UNOM determines the compensation system nominal voltage in volts or, if the voltage
transformer turns ration value is entered in parameter 17, in kilovolts. It is phase voltage or line
voltage, depending on the type of measurement voltage (parameter 15).
If the type of connection is specified manually (parameter 15), parameter UNOM is preset to its default
value – for phase voltage (U=LN) UNOM is preset to 230 V, for line voltage (U=LL) to 400 V. The
actual UNOM value is further entered by the controller within each automatic connection
configuration detection process to one of the values in Table 3.1 depending on the measurement
voltage value.
Unless the compensation system nominal voltage value is untypical, it is usually not necessary to
change the UNOM value recognized. If otherwise, the parameter value can be edited from 50 to 750 V
(if voltage transformer conversion is used, the value is displayed in kV after conversion).
Undervoltage and overvoltage alarm threshold values (parameter 31,32) are related to the UNOM value.
The UNOM parameter value can by at any time later edited without affecting each section’s actual
power value (parameter 25). Sections’ actual power values (for example as they were detected in the
latest automatic section power recognition process) are kept in the controller, only their displayed
nominal values, which are related to the UNOM value, are affected.
4.1.13 Parameter 20 – Automatic Section Power Recognition Process
The controllers are shipped with default setting of enabled automatic section recognition power
process (parameter 20 set to A, AC=A). With this setting, the controller carries out the automatic
section power recognition process on controller powerup (introduction of power supply voltage) if none
of the compensation sections is specified at a valid power value (see parameter 25). This condition
always takes place with the first installation or initialization of the controller or after unsuccessful
previous automatic section power recognition process. If at least one of the compensation sections is
at valid power value, the automatic section power recognition process is not carried out.
35
Novar 1xxx
KMB systems
If the parameter is set to 1, the controller carries out the automatic section recognition power process
every time the controller is powered up, irrespective of the section values having been recognized
before or not.
The process can also be started without interrupting power supply voltage, by editing parameter 20 to
value1 or by controller initialization (see further below).
If the automatic section power recognition process is enabled, it makes no sense to set parameters 21
through 24, therefore these parameters are not shown.
The automatic section power recognition process can be disabled by setting parameter 20 to 0. In
such an event, sections’ values must be entered using parameters 21 through 24.
Comment : If linear switching mode ( see parameter 21) is set, the automatic section power
recognition process cannot be enabled.
4.1.14 Parameter 21, 22 – Switching Program, Selection of Linear Switching Mode and
Smallest Capacitor (C/ kMIN) Nominal Power
If the Automatic Section Power Recognition Process is disabled, these parameters allow entering the
value of each section or setting the “Linear Switching Mode”.
If you select one of the preset combinations for parameter 21 as shown in Table 4.3, you select
a “switching program” that specifies the ratios of all capacitor sections’ values.
When selecting a switching program, the capacitors have to be connected to the controller’s outputs in
sequence where the lowest weight capacitor is connected to output 1. The number of capacitors
connected needs entering in parameter 23. If this number is more than 5, the controller assumes the
weights of sections 6 and higher are the same as the weight of section 5.
Table 4.3: Switching Program
#
1
combination
1:1:1:1:1
2
1:1:2:2:2
3
1:1:2:2:4
4
1:1:2:3:3
5
1:1:2:4:4
6
1:1:2:4:8
displayed
1111
1122
11224
1123
1124
11248
#
7
combination
1:2:2:2:2
8
1:2:3:3:3
9
1:2:3:4:4
10
1:2:3:6:6
11
1:2:4:4:4
12
1:2:4:8:8
displayed
1222
1233
1234
1236
1244
1248
If none of the preset combinations corresponds to the the combination required, you can enter each
section’s value as you desire by editing parameter 25. In such an event, parameter 21 value
automatically becomes undefined, ---, which means “individual switching program”. Parameter 22
thus loses its meaning and it is therefore not displayed.
Having selected the switching program as shown in Table 4.3, you still need to specify the nominal
power value of the smallest (corresponding to weight 1) capacitor C/kMIN (parameter 22) in kvar
(although the controller measures in single phase, the value corresponds to the three-phase capacitor
total value). CT ratio (parameters 12, 13) and UNOM nominal voltage (parameter 18), possibly also VT
ratio (parameter 17), values have to be already correctly specified in the instrument prior to entering
the aforementioned smallest capacitor power value – only then the smallest capacitor’s nominal value
specified is actual.
36
Novar 1xxx
KMB systems
The smallest capacitor nominal value is to be taken from its identification plate or checked by
measuring its phase current with a clamp-on ammeter. Table 4.4 shows phase current values for the
most usual three-phase compensation capacitors.
Table 4.4: Capacitor’s Phase Current Value (for Us=400V)
Q [kvar]
I [A]
Q [kvar]
I [A]
2
2.9
15
21.7
3.15
4.6
20
28.9
4
5.8
25
36.1
5
7.2
30
43.4
6.25
9.0
40
57.8
8
11.6
50
72.3
10
14.5
60
86.7
12.5
18.1
100
144.5
If parameter 21 is set to L, no switching program is selected (section values have to be entered in
parameter 25) and the linear switching mode is enabled to switch harmonic filters. In this mode the
controller connects or disconnects compensation sections in the linear fashion, which means:
•
always the lowest in order not yet connected compensation section(s) is/are connected
•
always the highest in order connected compensation section(s) is/are disconnected
Each section that is not permanently connected or permanently disconnected is considered
a compensation section involved in the control process.
On setting the Automatic Section Power Recognition Process (parameter 20) to either A or 1, the
linear switching mode is disabled.
Warning ! It is strongly recommended not to activate linear switching mode at standard power factor
compensation applications, otherwise quality of control process will be decreased.
4.1.15 Parameter 23 – Number of Capacitors
If entering capacitors’ currents manually using the switching program and smallest capacitor power
(parameters 21, 22), it is also necessary to enter the number of capacitors connected – parameter 23.
The value can be set within the range from 1 to the controller’s number of outputs.
If using a smaller number of capacitors than the type of controller allows, it is necessary to connect the
capacitors to outputs starting with output 1 (that is the unconnected outputs will be those with the
highest ordinal numbers).
If the controller outputs are not all used for capacitor connections, the unused outputs can be used to
connect compensation chokes. The controller assumes that the chokes are connected from the lowest
free output up (that is starting with the section following the last capacitor output connected).
These chokes’ currents can be entered in parameter 25, for each choke separately (careful, a choke’s
current must be entered as a negative value – positive polarity currents are considered capacitive
sections by the controller!)
4.1.16 Parameter 25 – Compensation Section Nominal Power
Nominal power of each compensation output can be edited in the side branch of this parameter if
necessary.
The values are displayed in kilovolt-ampere reactive, kVAr, and they correspond to the nominal
three-phase power of the relevant section under voltage corresponding to the compensation system
nominal voltage UNOM (parameter 18) value specified. To have the values correspond to the actual
section (capacitor or inductance) compensation power, the current transformer turns ration must be
specified correctly as well (parameters 12, 13) or voltage transformer turns ratio (parameter 17) must.
If these turns ratios are not specified, the section power values are displayed as if the turns ratio is 1.
37
Novar 1xxx
KMB systems
Capacitive sections are shown as positive, inductive sections as negative values. If a section’s current
is not known (for example because of successful completion of the automatic section power
recognition process), the ---- value is shown. In such an event, as well as in the event of section
current zero value, the controller does not use the corresponding control output.
The controller is shipped with default setting of the automatic section power recognition process
enabled (parameter 20 set to A). The automatic section power recognition process is started on
introducing the power supply voltage, and after the process is complete, you can check or edit the
recognized currents in the side branch of parameter 25.
Each section’s nominal power can be changed even if it has been entered manually using the
switching program and smallest capacitor current (parameters 21, 22).
If a section’s value is shown with a flashing decimal point, it means:
• decimal point flashing slowly (about once a second), the section has not been accurized yet –
see description of the mechanism to accurize sections in the relevant chapter further below
• decimal point flashing fast (about three times a second), the section has been disabled and the
controller is not using it – see description of the mechanism to section disablement in the
relevant chapter further below
If you change the UNOM value (parameter 18), the controller will keep the actual section power value
(for example from the latest automatic section power recognition process), only their displayed
nominal value, reflecting the changes to UNOM, will change.
4.1.17 Parameter 26 – Fixed Sections, Switching Cooling and Heating, Alarm
Any controller output can be set as fixed. In such a situation the output is permanently connected or
disconnected. The two highest outputs can further be used to switch cooling and heating, and in case
of Novar 10xx models for alarm signalling too. The controller does not use sections set up this way for
power factor control.
4.1.17.1 Fixed Sections
A fixed output maintains its preset condition (that is connected or disconnected) with the following
exceptions:
• the controller is switched to the Manual mode
• a selected nonstandard condition occurs while the alarm’s corresponding actuation
function has been set (for details see alarm description further below)
A fixed section (one set as permanently connected) is only disconnected if the alarm has been
activated because of crossing over the threshold level of the quantity selected for a specified time (for
details see description of alarm functions further below).
By default all controller’s outputs are set as controlled, not fixed. In such an event they are shown for
example as follows:
01-C.... output 1 is controlled and it is a capacitive section (capacitor)
12-L.... output 12 is controlled and it is an inductive section (choke)
Each section’s value can be set to 0 or 1, that is 01-0 or 01-1, respectively, is displayed
and the corresponding output becomes a fixed one – it stays permanently disconnected or
permanently connected.
38
Novar 1xxx
KMB systems
4.1.17.2 Switching Cooling and Heating
The two highest outputs can be set to switch cooling (fan) and heating, for example as follows:
14-F....output 14 set to switch cooling (fan)
13-H....output 13 set to switch heating
With the above setting, these outputs are controlled in function of the measured instantaneous
temperature. You can specify the threshold temperature to switch the cooling in parameter 59. If the
temperature drops below the threshold value, the relevant output closes and vice versa. Analogously,
parameter 60 is for specifying the heating threshold temperature to make the relevant output open if it
is exceeded.
Switching thresholds’ hysteresis is about 5°C.
4.1.17.3 Alarm Signalling ( Novar 10xx only )
The two highest outputs can be used for Alarm state signalling at Novar 10xx controllers. For one of
the outputs to be used as Alarm relay, it is necessary to set the output to one of following :
•
8-A
•
8-A.
.… output 8 set to Alarm signalling; if Alarm state active, the output is opened
…. ( = „A“ with decimal point ) output 8 set to Alarm signalling; if Alarm state
active, the output is closed
When Alarm function set, Alarm state is indicated not only by Alarm LED, but by opening/closing of
appropriate relay too.
4.1.18 Parameter 27 – Limit Power Factor for Compensation by Choke
In basic choke compensation mode this parameter specifies power factor value at which the controller
starts using, besides capacitive sections, inductive compensation sections for compensation as well –
chokes (if available).
If the power factor measured is more inductive (current more lagging) than the value specified in this
parameter, the controller uses only capacitive sections (capacitors) to control compensation.
If the power factor in the power system changes so that it is more capacitive (current more leading)
than the limit value for compensation by choke, the controller starts using combination of capacitive
and inductive compensation sections for compensation.
Exception: This rule does not apply when offset control ( par. 63 ) is activated ! In this case,
the value of measured power factor is not essential and the controller uses both capacitive
and inductive sections, regardless of its value. This is true even if the offset value ( par. 5/11 )
is set to zero.
When set to value S, so called symmetric choke compensation mode is activated.
By default this parameter’s value is set as undefined (-.-- displayed) in a shipped controller or after
its initialization. With this setting the controller does not use chokes that are available (such sections
are permanently disconnected) and it does not even detect available chokes in the automatic section
power recognition process.
Compensation by chokes is described in more detail in an appropriate chapter further below.
4.1.19 Parameter 30 – Alarm Setting
Novar line controllers feature two alarm type functions that are independent of each other:
• alarm indication
39
Novar 1xxx
KMB systems
• alarm actuation
#
condition
1 undercurrent
2 overcurrent
3 voltage failure
4 undervoltage
5 overvoltage
6 THDI >
7 THDU >
8 CHL >
9 compensation
error
10 export
11 number of
switching
operations
exceeded
12 section error
13 overheated
Table 4.5: Alarm – Indication
description
minimum delay of
activation /
deactivation
current at metering current transformer’s secondary 5 / 5 seconds
side under minimum measurement current
current at metering current transformer’s secondary immediately
side over 120% of nominal value setting (6 A / 1.2
A)
measurement voltage not detected ( < 30 Veff )
5 / 5 seconds
voltage one-minute moving average value lower
maximum 1 minute
than the undervoltage threshold specified
(depends on the
(parameter 31)
extent of
undervoltage)
voltage one-minute moving average value higher
maximum 1 minute
than the overvoltage threshold specified
(depends on the
(parameter 32)
extent of
overvoltage)
THDI one-minute moving average value higher
maximum 1 minute
than the THDI threshold specified (parameter 33); (depends on the
works on loads 5% and higher
level of THDI)
THDU one-minute moving average value higher
maximum 1 minute
than the THDU threshold specified (parameter 34) (depends on the
level of THDU)
CHL one-minute moving average value higher than maximum 1 minute
the CHL threshold specified (parameter 35)
(depends on the
level of CHL)
power factor fifteen-minute moving average value maximum 15
outside range 0.9L to 1.00; works on loads 5% and minutes (depends
higher
on the level of
power factor)
negative active power one-minute moving average maximum 1 minute
value detected (flow of power from appliance to
(depends on the
source)
level of active
power)
number of connects and disconnects od a section immediately
has exceeded the limit setting
permanently wrong section value detected in
compensation (usually section failure)
temperature one-minute moving average value
higher than the temperature threshold specified
(parameter 37)
14 external alarm
second metering rate input switched on
Note: Conditions shown above in bold type are set by default.
40
5 connections +
5 disconnections
maximum 1 minute
(depends on the
level of
temperature)
5 / 5 seconds
Novar 1xxx
KMB systems
4.1.19.1 Alarm Indication
In order to indicate nonstandard compensation conditions, the instruments feature an Alarm LED in
the front panel and an Alarm relay potential-free contact accessible at a connector in the rear panel. At
Novar 10xx models, that are not equipped with the dedicated Alarm relay, it is possible to use any of
highest two outputs for Alarm signalling ( see parameter 26).
Indication of a nonstandard condition occurrence shows as flashing Alarm LED and closed Alarm
relay contact. In standard condition this LED is dark and the relay contact open. At Novar 10xx
models, the relay state polarity is presetable, but it is always opened if voltage outage.
Nonstandard condition, at which alarm should be indicated, can be specified in the side branch of
parameter 30. Any of the eight conditions shown in Table 4.5 can trigger the alarm indication.
Alarm indication from any nonstandard condition can be selected by editing such a condition in the
side branch of parameter 30. The settings can take 4 different values:
1.
01-0... condition 1 (undercurrent) is not indicated (neither does it trigger actuation –
see description further below)
2.
01-S... condition 1 (undercurrent) is indicated (but it does not trigger actuation)
3.
01-A... condition 1 (undercurrent) is not indicated (but it triggers actuation)
4.
01-2... condition 1 (undercurrent) is indicated (and it triggers actuation)
Alarm indication can be set for any other condition in the same manner as shown for condition 1 in the
above example. For some conditions, alarm actuation can be specified besides indication (see
description further below).
Alarm indication can be triggered by one or a combination of some conditions specified. Alarm
indication will be triggered when the condition has been detected continuously for the time specified in
Table 4.5 as the 1st value; the 2nd value (after „/“) defines elapse time to stop alarm indication after the
condition disappears. The condition that has triggered alarm indication can then be checked in the
alarm status (in the side branch of parameter 40).
Unlike alarm actuation described below, alarm indication setting has no effect on the instrument’s
control process.
Besides conditions mentioned above, alarm indication will also be triggered by a condition when at
least one nonzero capacitive section has not been specified (when entering section values manually)
or identified (in the automatic section power recognition process). Under this condition, flashing
C=0
is shown on the numeric display.
4.1.19.2 Alarm Actuation
Independently of the alarm indication function, you can set alarm actuation for some of the
nonstandard conditions. Actuation means intervention in the control process, especially interruption of
controller operation, usually with subsequent disconnection of compensation sections. See list of
actuations in Table 4.6.
If you require that the controller respond to occurrence of an above nonstandard condition with its
corresponding actuation as shown in the table, you have to set the condition of choice in the side
branch of parameter 30 to
A
or
2
(see previous chapter).
Conditions not shown in this table do not trigger any actuations, hence they can not be set this way
either.
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Novar 1xxx
KMB systems
4.1.20 Parameters 31 through 37 – Alarm Indication/Actuation Limits
If indication or actuation from a condition shown in Table 4.7 is set up, you also need to specify the
relevant quantity’s limit value exceeding which triggers the indication or actuation. The table shows
parameter numbers where the limits are stored, limit setup ranges, and limit default values.
Number of switching operations limit (parameter 36) is shown in thousands.
If neither indication nor actuation from either of the two conditions has been set, the corresponding
limit value is not shown.
Table 4.6: Alarm – actuation
#
condition
1 undercurrent
minimum delay of
activation / deactivation
10 / 5 seconds
actuation
disconnection of all sections
except fixed ones
3 voltage failure immediately / 5 seconds
disconnection of all sections
4 undervoltage
maximum 1 minute (depends disconnection of all sections
on the extent of
undervoltage)
5 overvoltage
maximum 1 minute (depends disconnection of all sections
on the extent of overvoltage)
6 THDI >
maximum 1 minute (depends disconnection of all sections
on the level of THDI)
7 THDU >
maximum 1 minute (depends disconnection of all sections
on the level of THDU)
8 CHL >
maximum 1 minute (depends disconnection of all sections
on the level of CHL)
10 power export
maximum 1 minute (depends disconnection of all sections
on the level of active power) except fixed ones
12 section error 5 connections +
section disablement (see
5 disconnections
description in chapter below)
13 overheated
maximum 1 minute (depends disconnection of all sections
on the level of temperature)
14 external alarm immediately / 5 seconds
disconnection of all sections
Note: Conditions shown above in bold type are set by default.
Table 4.7: Alarm Limits
#
condition
limit –
parameter
number
4 undervoltage
31
5 overvoltage
32
6 THDI >
33
7 THDU >
34
8 CHL >
35
11 number of
36
switching
operations
exceeded
13 overheated
37
limit setup range
standard
value
50 ÷ 100 % UNOM (par. 18)
100 ÷ 200 % UNOM (par. 18)
1 ÷ 300 %
1 ÷ 300 %
80 ÷ 300 %
10 ÷ 2000 x thousand of switching
operations
80 %
110 %
20 %
10 %
130 %
1000
20 ÷ 60 °C
45 °C
42
Novar 1xxx
KMB systems
4.1.21 Parameter 40 – Alarm Status
If an indication function from a nonstandard condition is set (see description of parameter 30 – alarm
setting), you can view alarm’s current status in the side branch of parameter 40.
Indication can be triggered by any of the nine conditions shown in Table 4.5. Parameter 40 is used for
detailed identification of condition that has triggered alarm indication. Alarm indication has been
triggered by those conditions whose value is 1.
4.1.22 Parameters 43, 44 – Total Section Connection Time and Number of Section
Switching Operations
In the side branch of these parameters you can check the time that each section has been connected
for (parameter 43) and the number of switching operations for each section (parameter 44) since last
value reset.
The total section connection time is shown in thousands of hours. If the number is low, you can view it
at accuracy in the order of hours. Maximum value is 130 thousand hours.
The number of switching operations is shown in thousands. If the number is low, the value is shown
with a decimal point so that you can view it at accuracy in the order of single events, tens or hundreds
of switching operations. Maximum value is 4 million switching operations.
The numbers are kept in the controller’s non-backedup memory and stored in backed up memory
about every eight hours where it is maintained even on power supply outage. The numbers from the
last eight–hour interval are lost on voltage failure or controller initialization.
If a section’s contactor is replaced, the relevant output’s switching operation counter can be cleared by
editing it.
4.1.23 Parameter 45 – Type of Controller Error
The controller carries out self-diagnostic tests in regular intervals during the compensation process.
You can check the diagnostics’ results in this parameter.
It shows E-00 if no errors have occurred. If the value is other than zero, the controller has
identified an error. Such a condition does not necessarily mean the controller is out of operation — in
such an event the controller supplier must be contacted and told about the identification value of the
type of error shown. Using this value, a specialist will then decide about the method of solving the
problem.
4.1.24 Parameter 46 – Control Time
When optimising controller parameter settings, it is sometimes required to monitor control time in
detail. You can view the control time’s current value in this parameter – it is shown in seconds as
countdown to the next control intervention.
For monitoring the control time to make sense, the control operation must not be halted — therefore
the control operation is enabled while viewing this particular parameter. Another difference while
viewing this parameter is automatic jump back to display of values measured; this automatic jump
takes only place after having viewed the control time for about 5 minutes from the last button press (it
takes place as soon as in about 30 seconds while viewing any other parameters).
4.1.25 Parameters 50, 51, 52 – Instrument Address, Communication Rate and
Communication Protocol
These parameters are only important in instruments featuring remote communication interface.
When setting up a RS-485 remote communication you have to specify the instrument’s address
(parameter 50) to one of the values from 1 to 253 (addresses 0, 254, and 255 are dedicated to special
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Novar 1xxx
KMB systems
functions – do not use them). If a number of instruments are connected to the communication line,
each instrument must have a different address.
For Ethernet interface instruments, the address value is irrelevant (but communication rate and
protocol must be properly set). The instrument is addressed by so-called IP-address preset in built-in
communication converter ES01. Setup of the converter is explained in the ES01 Embedded Ethernet
to Serial Link Converter application handbook available on www.kmbsystems.eu .
The communication rate (parameter 51) can be set to one of the values: 4800, 9600, 19200 Bd.
The standard communication program uses a proprietary communication protocol, “KMB”. The
protocol is set as default in parameter 52, as P0. Data transfer without parity bit and with one stopbit
is used.
To facilitate implementation within user applications, the Modbus-RTU protocol can be used as well.
The protocol can be set as P1N / P1E / P1O ( non parity / even parity / odd parity ). Detailed
description of both protocols can be downloaded at www.kmbsystems.eu or requested from the
manufacturer.
The values specified will be kept even on controller’s initialization (see description further below).
4.1.26 Parameter 55 – Power System Frequency
In order to obtain correct evaluation of measurement values, connected voltage and current sampling
must be derived from the power system frequency. The controller measures the frequency on basis of
voltage signal zero crossover rate. Voltage and current sampling then takes place in accordance with
this parameter setting as follows:
F= A.... continuous sampling derived from frequency value measured (default setting)
F=50.... fixed sampling for power system frequency 50 Hz
F=60.... fixed sampling for power system frequency 60 Hz
Setting to A is optimum in most situations. Sampling of signals under measurement is continuously
governed by measured frequency 10-second moving window average within the range from 43 to
67 Hz.
If the voltage signal is distorted to a degree when frequency can not be measured with sufficient
accuracy, you can set up the parameter to 50 or 60. The measurement signals are then sampled at
the fixed rate specified with no regard to the frequency measured.
4.1.27 Parameters 56, 57 – average, maximum, minimum value evaluation window size
Besides displaying instantaneous measurement quantities, the controller also evaluates and records
average and extreme (maximum/minimum) values. The evaluation window size for maximum of THD,
CHL, harmonic components, and temperatures is fixed (1 minute) while it can be specified in the
range from 1 minute to 7 days for the other quantities, as shown in Table 4.8.
Table 4.8: average and extreme power and power factor value evaluation window sizes
param.
description
56 window size for evaluation of average power factor,
Acos, and average power, APac, APre.
57 window size for evaluation of minimum power factor,
mincos, and maximum power, maxPac, maxPre, and
maxdPre
44
default value
7 days
15 minutes
Novar 1xxx
KMB systems
At the default setting shown above, the quantities Acos, APac, and APre contain the values of average
power factor, average active power, and average reactive power, respectively, for the last 7 days.
Analogously the quantities mincos, maxPac, maxPre, and maxdPre contain the minimum values of 1minute moving averages if power factor, maximum value of 1-minute moving averages of active
power, maximum value of 1-minute moving averages of reactive power, and maximum value of 1minute moving averages of difference between actual and required reactive power, respectively, since
last reset.
Moving window size can be selected of 1 –15 –1H – 8H –1d –7d , that is 1 minute – 15 minutes
– 1 hour – 8 hours – 1 day – 7 days. On changing the evaluation moving window size, the relevant
average and extreme values are automatically cleared and the evaluation restarted.
4.1.28 Parameter 58 – Temperature Display °C / °F
This parameter specifies if the temperatures measured are displayed in degrees Celsius or
Fahrenheit.
The measurement quantities of instantaneous temperature (Temp), maximum temperature
(maxTemp) and parameters overheating alarm limit (parameter 37), heating switching threshold
(parameter 59), and cooling switching threshold (parameter 60) are all displayed using the unit
specified and indicated with symbols
O
C or OF.
4.1.29 Parameters 59, 60 – Cooling and Heating Switching Thresholds
Of an output is set up to switching cooling or heating in parameter 26, you can specify the switching
temperature threshold required in parameter 59 or 60. The switching temperature hysteresis is about
5°C. The ranges and default thresholds are shown in Table 4.1.
If none of the output is set up to switching cooling or heating, the corresponding threshold is not used
or displayed.
4.1.30 Parameter 63 – Offset Control
In some cases it may be necessary to control "shifted" by a certain value of reactive power. A typical
example is an installation of a power transformer compensating capacitor permanently connected to
the transformer before the controller CT, or an installation of long power cable with not-negligible
parasitic capacity. In such cases, so called offset control can be used.
As default, the parameter 63 is set to 0 ( OF=0 ). In this setting, the offset control is turned off and
the controller maintains the target power factor value, set in par. 01 (or 07).
If you set it to 1 ( OF=I) , the offset control is activated with following consequences:
•
flashing decimal point of target power factor value ( par. 01 and 07 ) indicates that the offset
control is active
•
you can scroll to parameters 05 and 11, which can be set to the nominal offset (three phase)
reactive power value for metering rate 1 (parameter 05), respectively for metering rate 2
(parameter 11)
•
after the power factor control deviation ( i.e. reactive power difference to achieve target power
factor) is evaluated, the controller adds to it the offset power value, preset in the parameter
05, respectively 1. Therefore it controls to this “shifted” reactive power.
45
Novar 1xxx
KMB systems
Example:
A compensation capacitor with a nominal value of 5 kvars is permanently connected to a power
transformer, which is before the controller CT. It is required to control the target power factor of 1.00,
which is to be registered by an electricity meter, measuring whole transformer load. The controller can
then be set as follows:
•
set target power factor in parameter 01 to 1.00
•
Turn the offset control on, i.e. set the parameter 63 to 1
•
Set the offset power, i.e. parameter 05 to 5 (kvars)
When, for example, an active load of 15 kW occurs, then balanced state will be reached at power
factor of approximately 0.95 (measured by the controller). This value corresponds to the ratio of 5kvar
/ 15 kW. In other words, the controller will intentionally undercompensate by 5 kvar at the connected
network point in order the target power factor of 1.00 to be reached in the electricity meter connection
point, where the permanent capacitor comes to the effect.
When the offset control is activated, the limit power factor for compensation by choke parameter value
gets irrelevant - see the parameter 27 description.
4.2 Section Value Accurization
If the controller is set up to automatic section power recognition process, that means parameter 20 is
set to AC=A , or AC=1, it carries out the automatic section power recognition process on the first
initialization or reinitialization or on resuming power after a power failure.
After successful completion of the automatic section power recognition process, it records all the
power values measured and starts the control process. All power values measured are tagged as “not
yet precise”. A sections, the value of which is not yet precise, can be identified by slowly flashing
decimal point (as opposed to fast flashing decimal point to identify a disabled section – see description
further below).
The controller measures the sections continually within the control process as they are connected and
disconnected. It evaluates the average value measured for each not-yet-precise section and, when
having received about 100 values, it rewrites the original section value, which was obtained in the
automatic section power recognition process, with it. At the same time it tags the section as “precise”
and stops further accurization of such a section.
This way, possible inaccuracies in the automatic section power recognition process are removed.
If the sections’ values are specified manually (using the switching program and smallest capacitor
power or by editing section value in parameter 25), no subsequent accurization takes place. Neither is
accurization of choke sections, if present, carried out.
If the automatic section power recognition process is enabled, the accurization process can be
automatically started anytime during the control process as well. If the controller detects that
a compensation capacitor has repeatedly been showing a value different from that measured in the
automatic section power recognition process and the difference is not in order of magnitude (that is in
the interval from a half to double value) from the value recorded in the controller, the accurization
process for such a section will start. Thus effects of changes in compensation capacitor values, for
example as a consequence of the forming process after installation or due to aging etc., can be
eliminated.
46
Novar 1xxx
KMB systems
4.3 Faulty Section Indication and Disablement
In the alarm setting (parameter 30) you can choose alarm indication or actuation from detecting a
faulty section (section error).
If at least one of these functions has been set, the controller continually checks reactive power
changes in the power system during the control process as the sections are connected and
disconnected and compares them with each section’s power recorded. If connecting and
disconnecting a section does not repeatedly result in adequate change to reactive power in the power
system (or a change to reactive power measured is very different from the capacitor’s value recorded),
the controller tags such a section as faulty and, if relevant alarm actuation has been set, it will disable
the section and stop using it in further compensation temporarily.
Alarm indication can be used for section disablement indication (see description of parameter 30). If
alarm actuation is not set, the controller will only tag the faulty section, trigger alarm indication, but will
keep using the section in compensation. A particular faulty section can be identified by fast flashing
(about three times a second) decimal point in the section value display in the side branch of parameter
25 (as opposed to slowly flashing decimal point identifying not-yet-precise section – see description in
chapter above).
A section that has been temporarily disabled is periodically, about every five days, checked by
including it in compensation for one switching operation. If the controller detects a relevant response
in the power system (within adequate allowance) to connecting the section, it will include the section in
the control process again and, if the automatic section power recognition process is enabled, it will run
accurization process for it too. This way, for example, a repaired section is automatically included in
compensation (after replacing section fuse, for instance).
If the controller does not put a disabled section back to compensation automatically, such reinclusion
in the control process will take place in the following situations:
• power supply interruption or controller initialization (see description further below)
• editing the section’s value or one of parameters 21 through 23 (switching program,
smallest capacitor value, number of capacitors).
• automatic section power recognition process
Faulty section indication and disablement can only be set for capacitive sections – choke sections, if
present, are not checked.
4.4 Compensation by Choke
The instrument allows connecting chokes for power system decompensation. The decompensation
system can be built as combined, in which case both chokes and capacitors are connected to the
controller, or only chokes are connected. In such cases, power of the minimum capacitor or the
minimum choke, whichever is less, is considered to be the C/kMIN value which determines sensitivity of
the power factor control.
It is recommended that decompensation chokes to be connected to outputs 5 and higher. Outputs 1
through 4 are reserved for capacitive sections, since the controller uses these outputs in the automatic
connection configuration detection process. Nevertheless, even the outputs 1 through 4 can be used
for chokes – but the automatic detection process cannot be used and parameter 16 must be set
manually in such case.
The automatic section power recognition process can also be used to determine values of the chokes
connected, but the compensation by choke limit power factor (parameter 27) must be specified at
a valid value prior to this. If this parameter value has not been specified (-.-- shown), connected
chokes will not be detected.
47
Novar 1xxx
KMB systems
After controller initialization, parameter 27 value is not specified, so compensation by choke is
disabled by default.
4.4.1 Basic Choke Compensation
Usually, one or few chokes only are installed in combined compensation systems. To reach sufficient
precision of power factor control, a suitable set of capacitors are added to the choke(s) and controller
freely combines both the chokes and the capacitors as needed to reach preset target power factor.
We will call this ,,asymmetric“ mode as basic mode.
For the basic mode activation the choke power factor limit value (parameter 27) must be set within a
range from 0.8 lag to 0.8 lead. If this parameter is not defined (-.-- shown), compensation by
choke does not take place (if chokes are available at some of the outputs, these outputs are
permanently disconnected).
If the compensation by choke power factor limit value is specified as a valid setting, a choke is
connected in the following situation:
• controller has disconnected all capacitive sections
• power factor is still more capacitive (leading) than that required and also more capacitive than
the compensation by choke power factor limit value specified ( exception: while offset control
activation, this limit is not checked; see description of parameter 27 )
• this condition has lasted for five times longer than the overcompensation control time
(parameters 3, 9)
• a choke is available at least at one output and it has such a value that after its connection it will
be possible to control the power factor to desired value using a combination of capacitive
sections, that is large undercompensation will not occur after its connection
If a number of chokes are available to the controller, the most suitable one, depending on their values,
is connected, and another one is connected if the above described situation has lasted for another five
times longer than overcompensation control time specified.
If a combination of chokes are connected and undercompensation occurs, such a number of chokes
are disconnected after a normal undercompensation control time has elapsed (parameters 2, 8), which
prevent overcompensation.
4.4.2 Symmetric Choke Compensation
There exist some applications (such as renewable resources power plants) where continuous power
factor control in some range, usually symmetric to both sides from neutral value of 1, is required. In
such cases the same or similar sets of both capacitors and chokes are installed.
The basic choke compensation mode is often unsuitable for such installations. Therefore, so called
symmetric mode is implemented, that differs from the basic one in following :
• control period corresponds (similarly as for capacitors) to the overcompensation control time
(parameters 3, 9)
• during one control step, the controller switches combination of chokes to reach optimal power
factor
• the controller never combines capacitors with chokes (firstly, it switches all of capacitors off,
then switches chokes on and vice versa)
For the symmetric mode activation, set the parameter 27 to value S.
48
Novar 1xxx
KMB systems
4.5 Control Interruption
If the controller is in the automatic control mode (not in the Manual mode), one of the values
measured is shown on the numeric display (Measurement display mode) and the controller carries
out control process based on the values measured and parameter settings.
If you switch to parameter display, the control process will be interrupted. Output relays will stay in the
state they were at the moment of switching over the display mode. The controller assumes the
operator wants to check or change some of the parameters and it does not change the state of
outputs until this has been finished (provided no nonstandard conditions, such as measurement
voltage failure, have occurred, of course). At the moment of switching back to display mode, the
instrument continues the control process.
If the operator did not switch back to the Measurement display mode, the controller would switch to
the mode automatically in about thirty seconds from the last button press.
An exception is showing the control time (parameter 46) – in this event the control interrupted will
resume for operator to be able to check control process operation. The display will switch to showing
instantaneous values after about 5 minutes automatically.
Analogously to control interruption, the automatic connection configuration detection process or
automatic section power recognition process will be interrupted by the above mentioned procedure if
in progress. It, however, starts over from the beginning again once resumed.
4.6 Manual Mode
When installing or testing the controller it may sometimes be required to check the function of each
compensation section or it is necessary to put the automatic control process out of operation for
a rather long time.
In such situations, you can switch the controller to a mode in which it only carries out measurements
and displays the values. You can switch to this mode by pressing buttons M and P ( or buttons ▲
and ▼ for Novar 10xx models ) and holding them down simultaneously for about 6 seconds (until the
Manual LED starts flashing). You can switch back to the automatic control mode analogously.
You can not view or edit the controller’s parameters in the Manual mode – you can only close or open
each of the controller’s outputs.
On switching the regulator to the Manual mode, the outputs stay in the state they were in during the
control process before switching over the modes. You can then change the states of the outputs
manually – after pressing button P ( ►) the state of a corresponding output is shown (for example
01-0, which means output 1 is off – contacts open) and you can scroll through them all using
buttons ▲, ▼ and edit them very much like the instruments’ parameters. The outputs’ states change
while being edited, respecting the reconnection delay time specified.
If the controller is in the Manual mode and there is a supply voltage failure, the Manual mode is
resumed on power recovery. At this, all outputs that were on before the failure get switched on one by
one again (the states of outputs are remembered).
Warning ! Alarm actuation ( parameter 30 ) is disabled in Manual mode !
4.7 Manual Intervention in Control Process
In order to be able to check the controller’s response to a control deviation change, it is possible to
connect or disconnect a section by operator’s manual intervention, not only in the Manual mode but
also within the automatic control process.
49
Novar 1xxx
KMB systems
While holding button M pressed down you can connect or disconnect a section using buttons ▲and
▼ and watch the controller’s response to the change of condition. Each button press connects or
disconnects one compensation section, always the one with the smallest value (exception: in the
linear switching mode the order of connecting/disconnecting is specified in description of parameter
21). Reconnection delay time is respected when connecting.
If the controller is left in the automatic control mode, it will carry out evaluation and control intervention
after the control time has elapsed thus putting the unbalanced conditions in the power system back to
a compensated state.
4.8 Controller Initialization
In some situations it may be necessary to put the controller back to its default settings with which it is
shipped. You can do this using controller initialization. After initialization has been run, the initial test
starts too, that means the controller carries out all the operations as if the power supply voltage is
introduced.
The controller’s parameters are set to the values shown as default in Table 4.1 on initialization, except
the following parameters:
• metering current transformer nominal secondary value (13)
• type of measurement voltage (phase or line, 15)
• instrument address, communication rate and protocol in instruments with communication
interface (50, 51, 52)
These parameters remain unchanged, at the values specified before initialization.
The counters of connection time and switching operations (parameters 43, 44) are not affected by
initialization either.
You can start the controller initialization by pressing buttons M, P, and ▼ ( or buttons ▲, ▼and ►
at Novar 10xx models ) simultaneously and holding them down for about 6 seconds. The controller will
first disconnect all sections connected and run the initial test – this is when you can release the
buttons. Then it will carry out the initialization routine proper and since parameter 16 value is not
defined, it will start the automatic connection configuration detection process.
Warning! The Manual mode is terminated on initialization if active! The controller is always set to the
automatic control mode after initialization!
4.9 Capacitor Harmonic Load factor (CHL)
One of the measurement quantities is Capacitor Harmonic Load, CHL, factor. This quantity expresses
the total load of capacitors by current and with alarm actuation enabled, it can be used in protection of
the capacitors against overload. This factor’s definition follows.
Compensation capacitors’ service life depends on not exceeding operation limits. One of the limits is
capacitors’s maximum current. This may be exceeded with voltage harmonic distortion due to
a capacitor’s inductance being a function of the frequency.
If voltage in not distorted (sinus), the capacitor current is
Ic =
U
U
=
= 2πfCU
1
Zc
2πfC
[A]
where :
50
[1]
Novar 1xxx
KMB systems
Ic.... capacitor current
U.... capacitor voltage
Zc... capacitor impedance
f.... frequency
C... capacitor capacity
[A]
[V]
[Ω]
[ Hz ]
[F]
If the voltage is distorted, the current flowing through a capacitor forms as the sum of current harmonic
component vectors
r
Ic =
n
r
∑Ii
[ A]
[2]
i =1
and magnitude of each harmonic component is pursuant to formula [ 1 ]
Ii = 2 π fi C Ui = 2 π (ff x i ) C Ui
[A]
i.... order of harmonic
Ii.... current of ith harmonic component
Ui... voltage of ith harmonic component
fi.... frequency of ith harmonic component
ff.... fundamental harmonic frequency
[-]
[A]
[V]
[ Hz ]
[ Hz ]
[3]
where :
According to formula [ 3 ], the magnitude of current of each harmonic component is proportional to
a multiple of voltage and its order (Ui x i) of harmonic. Consequently, the total harmonic distortion,
which is defined as
U

THDU = ∑  i
i =2  U
 1
N





2
[%]
[4]
where:
THDU… voltage total harmonic distortion
[%]
Ui......... voltage of ith harmonic component
[V]
U1…..... voltage of fundamental harmonic component [ V ]
is not suitable as a criterion of capacitor current overload due to harmonic distortion, because it does
not respect distribution of harmonic components across their spectrum.
Therefore the capacitor harmonic load factor is defined as follows
 iU

i
CHL = ∑ 
i =1  U
 NOM
N
2


 * 100


[%]
[5]
where :
CHL… capacitor harmonic load factor
i........... order of harmonic
Ui........ voltage of ith harmonic component
UNOM… nominal voltage
[%]
[-]
[V]
[V]
This factor value does respect, besides respecting each harmonic component’s voltage value,
distribution of harmonic components of different orders across their spectrum and it addresses the
effect of voltage values. It is thus a more convenient value to determine total load of a capacitor by
current. If the nominal value voltage is undistorted, this factor is at value of 100%. The following table
51
Novar 1xxx
KMB systems
shows CHL factor values for a few selected scenarios of harmonic distribution at fundamental
harmonic component nominal value.
Table 4.9: Examples of CHL factor values for selected distributions of voltage harmonic components
(U1=UNOM)
No.
1
2
3
4
5
3rd
5th
2.5
3.5
5.0
5.5
8.0
3.5
4.5
6.0
6.5
9.0
voltage harmonic component levels [ % ]
7th
9th
11th
13th
15th
2.5
1.0
2.0
1.5
0.8
3.5
1.2
2.5
2.0
1.0
5.0
1.5
3.5
3.0
0.5
5.5
2.0
4.0
4.0
1.8
8.0
6.0
7.0
7.0
2.3
17th
19th
1.0
1.5
2.0
2.3
4.0
0.5
1.0
1.5
1.8
3.5
CHL
[%]
110
118
133
146
208
Example 3 (CHL = 133%) corresponds to voltage harmonic distortion limits as specified in EN 50160.
52
Novar 1xxx
KMB systems
4.10 Text Messages
In the measurement value display mode, a text message may appear in some situations instead of the
instantaneous power factor value. Table 4.10 shows a list of these messages.
Table 4.10: List of text messages
message
AHOy
meaning
comment
initial sequence after power up or initialization
controller carries out selfdiagnostics
TEST
N206
- type of controller
1 .2
- firmware version
U=Ln
- type of measurement voltage specified (phase,
phase-neutral)
parameter 15
I=5A
- metering current transformer nominal secondary
value specified
parameter 13
U=0
measurement voltage not present or its fundamental controller in waiting mode
harmonic component lower than minimum value
I=0
measurement current absent or lower than minimum controller in waiting mode
value
APnn
P=0
AC-n
C=0
automatic connection configuration detection
process in progress
process can have 1 to 7 steps
automatic connection configuration detection
process has failed and method of connection of
measurement voltage and current (parameter 16)
has not been defined
automatic connection
configuration detection process
will run again in about 15 minutes
automatically or parameter 16
value can be entered manually
automatic section power recognition process in
progress
process can have 3 or 6 steps
no capacitors have been successfully detected in
automatic section power recognition process or
if automatic section power
recognition process is set, it will
be automatically repeated in
about 15 minutes or you can
specify values of parameters 21
through 26 manually
in manual section value specification mode
(parameter 20), parameters 21 through 26 have not
been set properly or
all capacitive sections have been automatically
disabled because of error (parameter 25) or they are
set as fixed (parameter 26)
53
Novar 1xxx
KMB systems
5. Novar1312, Novar1312-3, Novar1005T Description
5.1 Basic Operation
These Power Factor Controllers allow optimized control of rapid reactive power compensation at up to
25 control interventions per second. It features transistor outputs to drive thyristor switches and, in
case of the 1312 and the 1312-3 models, relay outputs too to connect conventional contactors or to
switch cooling and heating, respectively.
5.2 Novar1312
The Novar1312 design concepts are shared with those of the Novar1214 and most of the features and
operations are identical. The Novar1312 differs from the Novar1214 mainly in the following:
•
•
outputs 1 through 12 are fitted with transistor
control rate of the above mentioned outputs can be set to up to 25 interventions per second
The following section of the manual therefore only deals with features and operations different from
Novar1214. The other features are the same as those of Novar1214.
5.3 Novar1312-3
This model was created by extending of the Novar1312 model by two current inputs that allow (like
three-phase Novar1414 controller) three-phase power factor compensation.
Unlike the Novar 1414 model, the Novar1312-3 is not a classic three-phase controller - to achieve the
highest possible regulation speed, the controller evaluates vector sum of current signals of all three
phases by hardware. This solution has the following consequences:
•
instrument evaluates only three-phase active and reactive power and three-phase power
factor (single-phase values are not available); values of current harmonics and THDI are
evaluated as average of all three phases
•
when connecting current signals, it is necessary to observe both polarity (k, l) and phase
rotating sequence
•
instrument can be used in 50 Hz nominal frequency networks only ( 60 Hz version is
available on request )
5.4 Novar1005T
The Novar1005T design concepts are shared with those of the Novar1005 and differs from it mainly in
the following:
•
•
all of outputs (6) are fitted with transistor
control rate of the above mentioned outputs can be set to up to 25 interventions per second
The other features are the same as those of Novar1005.
54
Novar 1xxx
KMB systems
5.5 History of Firmware Versions
version
0.1
1.0
1.1
1.2
1.3
date of release
3/2007
10/2008
4/2014
6/2014
8/2016
note
- basic version
- maximum control rate increased
- THD & CHL alarm behaviour correction at voltage fail
- MaxTHD & MaxCHL values correction
- minimum decompensation choke size decreased
5.6 Installation
5.6.1 Measurement Currents
5.6.1.1 Novar1312
In the same way as the Novar1214 model, connect metering current transformer (CT) outputs to
terminals 1 (k) and 2 (l).
5.6.1.2 Novar1312-3
Metering current transformer outputs must be connected as follows :
•
L1- phase current to terminals 41 ( k ) and 42 ( l )
•
L2- phase current to terminals 43 ( k ) and 44 ( l )
•
L3- phase current to terminals 1 ( k ) and 2 ( l )
All of the CTs must have the same conversion ratio and unlike other controller models it is
necessary to observe phase rotating direction and polarity of individual phase signals (k, l) !
Otherwise the controller evaluates wrong current, power and power factor values.
5.6.1.3 Novar1005T
In the same way as the Novar1005 model, connect metering current transformer outputs to terminals 1
(l) and 2 (k).
A metering current transformer of nominal output current 5 or 1 A can be used.
5.6.2 Transistor Outputs
5.6.2.1 Novar-1312, Novar-1312-3
The controller is equipped with 12 MOSFET-type transistors T1 through T12. Their open collectors are
connected to terminals 18 through 29. Emitters are connected together to common terminal 17.
55
Novar 1xxx
KMB systems
Fig 5.1 : Novar-1312 – connectors
Fig. 5.2 : Novar-1312-3 – connectors
NOVAR 1312 / 232 485
NOVAR 1312-3 / 485 E
Výr.č./verze.:
Serial / vers.:
/
/
Datum výroby :
2
3
4
5
6
7
8
9
10
11
12
1
100 ÷ 275 VAC, 7VA, 43 ÷ 67 Hz
U
IP 4X Made in Czech Republic
1
IP 4X Made in Czech Republic
1
2
2
3
4
5
6
7
8
9
10
11
12
k
L1
L2
L3
N
ZDROJ
l
L1 N
max.
10A
L1 N
230 VAC
k
Rx Tx GND
RS 232/485
TR A B GND
L1
L2/N
100÷690 VAC
max. 6A
l
k
l
k
l
L
14
N
L
SPOTŘEBIČ
L1
L2
L3
N
N
VAC
max. 100÷275
10A
CAT III
5A
(1A)
2. TARIF
max. 6A
13
ALARM
ALARM
5A
(1A)
/
/
Product. date :
100 ÷ 275 VAC, 7VA, 43 ÷ 67 Hz
U
L
L/N
58÷690 VAC
CAT III
max. 6A
SUPPLY
2. TARIF
max. 6A
LOAD
5.6.2.2 Novar-1005T
The controller is equipped with 6 MOSFET-type transistors T1 through T6. Their open collectors are
connected to terminals 7 through 12. Emitters are connected together to common terminal 6.
Fig. 5.3 : Novar-1005T – connector
These outputs are designed to connect to thyristor switches’ input otpocouplers via limiting resistors.
This is reflected in limit parameters of the transistor outputs as well: maximum voltage 100 V DC and
maximum current 100 mA.
All of the transistor outputs in the group are galvanically isolated from the other controller circuits. The
transistor outputs must be powered from the switching module’s power supply or from an external
power supply giving 10 to 30 V DC and protected with a fuse 0.3 to 0.5 A (for example ZP-24 that can
be ordered from the controller supplier). The power supply’s negative terminal post must be connected
to the common terminal.
56
Novar 1xxx
KMB systems
5.6.3 Relay Outputs
The Novar-1312 and the Novar-1312-3 models have additional 2 output relays : R13 and R14. The
relays’ contacts go to terminals 33, 34. Relays’ common contacts are internally connected to power
supply terminal 3 (L) — when an output relay contact closes, power supply voltage appears at the
corresponding output terminal.
The relays’ output contacts are bridged with varistors.
5.6.4 Communication
Despite of standard models, the Novar-1312 controller doesn’t support the Modbus-RTU protocol.
5.7 Operation
5.7.1 Thyristor and Contactor Group
The controller features from six to twelve transistor outputs, T1 through T12, and excluding the 1005T
model two relay outputs : R13 and R14. Thyristor switches can be connected directly to the transistor
outputs. Contactors can be connected directly to the relay outputs. Thyristor switches must be
connected successively starting with output T1 while the number of outputs used must be specified in
parameter 28 on controller powerup (the parameter’s default value is 0).
Display test will take place first on powerup. Information as described in Chapter 3.1 will then be
displayed momentarily while the last parameter displayed is the number of transistor outputs used
(such as t=O).
After that you have to set the parameter to the actual number of thyristor switches connected to the
transistor outputs. The automatic connection configuration detection process and automatic section
power recognition process follow in a standard way as described in Chapters 3.2 and 3.3.
Parameter 28 value defines the thyristor group, which is a group of outputs to which thyristor
switches are connected. All the other outputs are the contactor group. Example: parameter 28 is set
to 3 – outputs 1 through 3 are the thyristor group and outputs 4 and 14 are the contactor group.
The thyristor groups outputs are used by the controller for fast control process. The contactor group
outputs are used for slow control process (see further below).
If not all the transistor outputs are used for connection of thyristor switches, the unused ones can be
used for connection of contactors; contactors, however, must be connected to the transistor outputs
via auxiliary relays (such as Schrack RT with 24 V DC coil). A wiring example is shown in an
appendix.
5.7.2 Control Principles
Two simultaneous, into a degree independent, control processes take place in a controller:
•
fast control process with thyristor group outputs driving semiconductor switches
•
slow control process with contactor group outputs switching contactors
Fast control process has a measurement stage, calculation stage and execution of control
intervention. The control intervention rate, as well as the transistor outputs’ reconnection delay time,
can be specified to allow control process adaptation to power of the quick-discharge resistor used.
The sections that only differ by less than a quarter from the transistor group’s smallest section are
considered equal by the controller and they are switched cyclically. When calculating the optimum
control intervention, only each control section’s value is important (number of connections is not
evaluated.
57
Novar 1xxx
KMB systems
Slow control process has to respect limitations from the compensation sections’ contactors’
parameters and service life. Phase measurement takes place once a second and control phase
timing, which can only repeat every five seconds, is determined by the control deviation evaluated and
control period specified. When calculating control intervention, the reconnection delay time has to be
respected too. The optimum control intervention is chosen not only on basis of the sections’ values,
but also from the point of view of the number of switching operations on each section, the time since
the last disconnection and the total number of switching operations within a control intervention.
In an optimum case, the typical control process thus goes on like this: the fast process compensates
small power factor deviations within fractions of seconds, and that appears as a compensated
condition to the slow process, so the contactor group outputs’ states do not change. If there is a larger
deviation in power factor than corresponds to the thyristor group’s control capacity, the thyristor group
outputs’ states reach their limit (all connected or all disconnected). The slow process evaluates the
control deviation and the control time of this slow control process starts counting down. After the
countdown elapses, control intervention using output relays is carried out.
A control intervention from the slow control process is carried out in such a way that compensated
condition is achieved while about one half of the thyristor group’s compensation capacity is connected.
Under such optimum condition, the fast process is then able to respond to a change in power factor of
either polarity in the power system.
An exception is a state, when only low compensation power is necessary. When the compensation
power necessary is lower than total capacity of thyristor group sections, a control intervention by slow
control process is carried out in the way to simply reach compensated state (not considering that one
half of the thyristor group sections’ compensation capacity should be connected).
5.8 Setup
Fast Novar power factor controllers have two more parameters in comparison with Novar1214:
•
•
number of capacitors in thyristor group (parameter 28)
thyristor group control rate and reconnection delay time (parameter 29)
Parameters 2 through 4, 14, 21 through 23, 43, 44, and 46 only relate to the contactor group in
Novar1312. The other parameters are the same as that of the standard controller models.
A complete list of parameters is shown in Table 5.1.
5.8.1 Parameter 28 – Number of Capacitors in Thyristor Group
It is necessary to enter the number of capacitors for fast compensation connected by thyristor
switches when installing the controller.
Up to twelve (or six for the 1005T model) capacitors for fast compensation can be connected. If using
fewer capacitors, it is necessary to connect the capacitors to outputs starting with T1 in the group (that
is, the unconnected outputs will be those with the highest ordinal numbers).
The value specified will be maintained even on controller initialization (see description further below).
5.8.2 Parameter 29 – Thyristor Group Control Rate and Reconnection Delay Time
Although lifetime of thyristor switches is not limited by number of switching operations and due to
switching at zero voltage no current spikes occur, the thyristor group control rate and reconnection
time can be specified in this parameter.
58
Novar 1xxx
KMB systems
It is because in some situations, the switching rate and reconnection delay time must be adopted to
the fast-discharge resistors’ power rating (these resistors are required for proper power thyristor switch
operation if compensation capacitor overcharging takes place).
The value of the parameter is displayed as R-N.N, where
R.........
N .N …
number of control interventions per second
reconnection delay time in seconds
The control rate ( = number of interventions per second ) can be set in range 1 through 20
interventions per second. The reconnection delay time can be specified as shown in Table 5.2.
Note: If 10 control interventions per second are specified, “r” is displayed as 9 (for example 9-0.1).
Table 5.2: Thyristor group control rate and reconnection delay time setting
Control Rate
Reconnection Delay Time
[ control interventions per second ]
[ seconds ]
1
1 - 2 - 5 - 10
2
0.5 - 1 - 2.5 - 5
3
0.3 - 0.7 - 1.7 - 3.3
5
0.2 - 0.4 - 1 - 2
10
0.1 - 0.2 - 0.5 - 1
20 *)
0.0
*) real control rate depends on number of capacitors in thyristor group, see below.
Table 5.3 : Real control rate at setting of 20 control interventions per second
Thyristor Group Capacitors Number
( parameter 28 )
1÷5
6÷7
8 ÷ 12
Real Control Rate
[ control interventions per second ]
>= 25
>= 20
>= 15
When shipped and after controller initialization, the values 1-10 are set, that means one control
intervention per second and ten seconds of reconnection delay time.
5.8.2.1 Control Operation at the Highest Control Rate
At setting of the highest control rate, i.e. 20 control interventions per second, real control rate is not
fixed, but it depends on preset number of the thyristor group capacitors number ( parameter 28).
General rule is the fewer capacitors the higher rate – see Table 5.3.
Furthermore, during frequency measurement that is performed each second, control cycle delay of
approx. 30 milliseconds occurs. This delay can be eliminated by network frequency setting (
parameter 55 ) to fixed value of 50 or 60 Hz, if it is possible. At such setting the controller doesn’t
measure the frequency and therefore no delay occurs. Measured frequency value is undefined.
59
Novar 1xxx
KMB systems
Table 5.1: Novar1312 / Novar1312-3 / Novar1005T Parameters
#
name
0
1
parameter edit enable/disable
target power factor (metering rate
1)
contactor group control time on
undercompensation (met. rate 1)
0/1
0.80 L ÷ 0.80 C
—
0.01
1
0.98 L
see Enable / Disable Parameter Editing
5 sec ÷ 20 min
—
3 min
3
contactor group control time on
overcompensation (met. rate 1)
5 sec ÷ 20 min
—
30 sec
No “L”: control time reduction by squared
proportion
“L”: linear control time reduction.
No “L”: control time reduction by squared
proportion
“L”: linear control time reduction
4
6
7
÷
10
12
contactor group control bandwidth
metering rate 2 enable/disable
like parameters 1 ÷ 4, but for
metering rate 2
0.000 ÷ 0.040
0–1–E
the same as
parameters 1 ÷ 4
0.005
—
—
0.010
0
—
metering current transformer
primary side nominal value
metering current transformer
secondary side nominal value
contactor group reconnection
delay time
type of measurement voltage –
phase or line
5 ÷ 9950 A
5
none
1A÷5A
—
5
5 sec ÷ 20 min
—
20 sec
LN (phase) – LL
(line)
—
LN
16
17
method of connection of U and I
voltage transformer turns ratio
6 combinations
direct or 10 ÷ 5000
—
—
none
--- (direct)
18
compensation system nominal
voltage UNOM
50 ÷ 750 V x VT
turns ratio
—
230 / 400
V
20
automatic section power
recognition process
contactor group switching
program
A (auto) – 0 (no) –
1 (yes)
12 typical
combinations
—
A
—
none
22
contactor group smallest
capacitor nominal power (C/kMIN)
(0.007 ÷ 1.3 kvar)
x CT turns ratio x
VT turns ratio
0.001
none
23
1 ÷ 14
—
14
25
number of capacitors in contactor
group
each section nominal power
(0.001 ÷ 5.5 kvar)
x CT turns ratio x
VT turns ratio
0.001
none
26
fixed sections
—
27
choke compensation power factor
limit
number of capacitors in thyristor
group
regulated or
0/1/F/H
0.80 L ÷ 0.80 C
0.01
all
regulated
none
1 ÷ 12
—
0
1 ÷ 20 control
interventions per
second / 0.1 ÷ 10
seconds
0 / indication only /
actuation only /
indication and
actuation
—
1 per
second /
10
seconds
ind. & act.
from
undercurre
nt, voltage
loss or
section
error
2
13
14
15
21
28
29
thyristor group control rate and
reconnection delay time
30
alarm setting
range
step
60
—
default
comment
Not displayed if metering rate 2 is
disabled (parameter 6 = 0)
This parameter’s correct setting is
essential for automatic connection
configuration detection process
see parameter description
ratio of metering voltage transformer
nominal primary voltage to nominal
secondary voltage
controller establishes this value within the
automatic connection configuration
detection process
0 means individual section setting. Not
shown if automatic section power
recognition process is enabled.
Value corresponds to UNOM specified
(parameter 18). Not shown if automatic
section power recognition process is
enabled.
Not shown if automatic section power
recognition process is enabled.
Value corresponds to UNOM specified
(parameter 18).
Positive for capacitor sections, negative
for choke sections.
„F“,/ „H“ for 2 highest sections only
If not specified, compensation by choke
does not take place.
It must always be specified manually. The
controller keeps the value specified on
initialization.
In effect for thyristor group only.
1... undercurrent
2... overcurrent
3... voltage loss
4... undervoltage
5... overvoltage
6... THDI >
7... THDU >
8… CHL >
9… compensation
error
10… export
11… no. of conn.’s >
12… section error
13… overheated
14… external alarm
Novar 1xxx
31
÷
37
40
43
44
45
46
50
51
52
55
56
57
58
alarm thresholds: undervoltage,
overvoltage, THDI, THDU, CHL,
number of connections and
temperature
alarm instantaneous condition
section connection time (in
thousands of hours)
number of section connections (in
thousands)
instrument failure condition
instantaneous condition of control
time
instrument address
(communication interface)
communication rate
(communication interface)
communication protocol
(communication interface)
power system frequency
average value evaluation moving
window size
minimum and maximum value
evaluation moving window size
KMB systems
—
—
—
Ranges and units as in Table 4.7
not displayed if the alrm not set up
Indicates current state of alarm.
Display range 0.001 to 130
In effect for contactor group outputs only.
Display range 0.001 to 4000.
In effect for contactor group outputs only..
time until next contactor group control
intervention in seconds
1 ÷ 254
1
1
4800 – 9600 –
19200 Bd
KMB(P0)
—
9600 Bd
—
KMB(P0)
A (auto) – 50 Hz –
60 Hz
1 minute ÷ 7 days
—
A (auto)
-
7 days
1 minutes ÷ 7 days -
Modbus-RTU protocol not supported
applies to average values of Acos, APac,
APre
15 minutes applies to these minimum and maximum
values: mincos, maxPac, maxPre,
maxdPre
°C – °F
-
°C
59
Celsius/Fahrenheit temperature
display mode
cooling enable threshold
+10 ÷ +60 °C
1 °C
+40 °C
60
heating enable threshold
-30 ÷ +10 °C
1 °C
-5 °C
61
not displayed if cooling output not
specified
not displayed if heating output not
specified
Novar 1xxx
KMB systems
6. Novar-1414 Description
6.1 Basic Operation
Despite of other models, this controller model has three current measurement inputs ( one voltage
measurement input only stays unchanged ). It is capable to measure load of all three phases and
evaluates three-phase power factor for the control. Therefore, it is suitable especially for applications
with great or variable load unbalance.
The following section of the manual therefore only deals with features and operations different from
Novar1214. The other features are the same as those of Novar1214.
6.2 Measurement Values
The controller measures current in all three phase wires and evaluates appropriate phase power
factors. But one (phase or line) voltage signal is measured only – therefore it supposes that other two
voltages magnitudes are the same.
From individual phase power factors it calculates three-phase power factor, that is essential for power
factor control.
6.2.1 Main Branch
Main network values according the table 6.1 can be listed on the instrument display.
Tab. 6.1 : List of the Novar-1414 Measurement Quantities – Main Branch
abbreviation
cos
quantity
Instantaneous power factor. The value corresponds to the ratio of
instantaneous active component to instantaneous total power
fundamental harmonic value in the power system. A positive value
means inductive power factor, negative means capacitive power factor.
Ieff
Average value of instantaneous current effective values I1, I2, I3
(including higher harmonic components).
Ueff
Instantaneous voltage effective value in the power system (including
higher harmonic components). By default shown in volts. If the
measurement voltage is connected via a metering transformer, in
kilovolts (see description of parameter 17).
* … in A as default; flashing decimal point indicates value in kA
unit
-
A / kA *
V (kV)
Despite of other models, the Ieff value in the main branch contains average value of instantaneous
currents of individual phases L1, L2 and L3 according to formula
Ieff =
I1eff + I2 eff + I3eff
3
[A]
[6]
6.2.2 COS Branch
Additional individual single-phase power factors cos1, cos2 a cos3 can be checked in „the Cos“ side
branch. Other quantities are the same as at standard models.
62
Novar 1xxx
KMB systems
Tab. 6.2 : List of the Novar-1414 Measurement Quantities – Cos Branch
abbreviation
symbol
cos1
cosI
cos2
cos3
PAC
cos2
cos3
Pac
…
…
quantity
Instantaneous power factor of phase L1
unit
-
Instantaneous power factor of phase L2
-
Instantaneous power factor of phase L3
-
Instantaneous fundamental harmonic active power (Power
active).
… etc.
kW / MW *
6.2.3 A Branch
All quantities related to current are shown in this branch. Despite of standard models , quantities Iact,
Irea , dIrea and maxTHDI are removed.
Tab. 6.3 : List of the Novar-1414 Measurement Quantities – A Branch
abbreviation
symbol
I1eff
iI
i2
i3
tHdI
I2eff
I3eff
THDI1
THDI2
tHd2
THDI3
tHd3
3. ÷ 19.har
of
currents
I1, I2, I3
3HI/ 2 / 3
÷
quantity
Instantaneous current effective value of phase L1
unit
A / kA *
Instantaneous current effective value of phase L2
A / kA *
Instantaneous current effective value of phase L3
A / kA *
Instantaneous level of total harmonic distortion of L1-phase
current
Instantaneous level of total harmonic distortion of L2-phase
current
Instantaneous level of total harmonic distortion of L3-phase
current
Instantaneous level of 3÷19-th harmonic component of
L1/L2/L3-phase current
!9HI/ 2 / 3
* … in A as default; flashing decimal point indicates value in kA
6.2.4 V Branch
Displayed quantities are equal to standard controller models ones.
6.3 Installation
6.3.1 Measurement Currents
It is recommended metering current transformer (CT) outputs to be connected as follows :
•
L1- phase current to terminals 41 ( k ) and 42 ( l )
•
L2- phase current to terminals 43 ( k ) and 44 ( l )
•
L3- phase current to terminals 1 ( k ) and 2 ( l )
A metering current transformer of nominal output current 5 or 1 A can be used.
63
%
%
%
%
Novar 1xxx
KMB systems
Fig. 6.1 : Novar 1414 Controller – connectors
Serial / vers.:
/
/
Product. date :
100 ÷ 275 VAC, 7VA, 43 ÷ 67 Hz
U
IP 4X Made in Czech Republic
1
2
3
4
5
6
7
8
9
10 11 12 13 14
ALARM
k
l
k
l
k
l
L
N
L
L1
L2
L3
N
N
VAC
max. 100÷275
10A
CAT III
5A
(1A)
L
L/N
58÷690 VAC
CAT III
max. 6A
2. TARIF
Rx Tx GND
RS 232/485
TR A B GND
max. 6A
LOAD
SUPPLY
6.3.2 Communication
Despite of standard models, the Novar-1414 controller doesn’t support the Modbus-RTU protocol.
6.4 Setup
From the controller setting point of view, the Novar-1414 model differs in one parameter only – in the
method of connection ( parameter 16 ).
6.4.1 Parameter 16 – Method of Connection of U and I
Parameter 16 determines the method of measurement voltage connection with respect to
measurement current. As the Novar-1414 has three current inputs, there are three method of
connection values for each current input. Therefore, the values are located in the parameter 16 side
branch.
Scrolling to the parameter 16 in main branch, the U __ parameter identification string appears.
Then enter to the side branch with the P button and the first subparameter value is displayed – voltage
connection method of the I1 current input ( for example L1-0 ). You can list through individual
subparameters with the ▲, ▼buttons.
For the individual subparameters identification, an identification mark flashes momentarily every five
seconds - U-L1 for connection method of I1 current input, similarly
inputs I2 and I3, respectively.
U-L2 and U-L3 for current
The voltage connection method marking corresponds to real phase marking L1, L2, L3 only if the
current inputs I1, I2 and I3 are connected to appropriate phases L1, L2 and L3 with proper phase
rotating direction and with correct k-l polarity. In such case, if measured voltage is connected, for
example, to phase L2, correct value of all subparameters wil be L2-0 ( because there is one
common measured voltage for all current inputs ).
The controller needs to know values of all three subparameters of parameter 16 for his work. If any of
them is undefined ( ____ ), the controller indicates it with P=0 message and starts the
automatic connection configuration detection process. During this, connection methods of all three
64
Novar 1xxx
KMB systems
current inputs are detected. After the process is finished, you can check their values in the parameter
16.
It is strongly recommended to use the connection detection process for the parameter 16 setup. If it is
not possible, you can use individual single-phase power factor values cos1, cos2 and cos3 for their
proper setting.
65
Power : 5 VA
Serial / Vers.
Product. Date :
U~ 80÷275VAC,43÷67Hz
NOVAR 1007
Novar 1xxx
KMB systems
7. Wiring Examples
Novar1007 – installation
66
67
N
L3
L2
L1
Supply
1
2
3
4
5
16: Aut.conn.detect.
20: Aut.step recogn.
25: Steps values
30: Alarm setting
40: Alarm state
k 5A l
1: Target cos ϕ
2: Contr. time ind.
3: Contr. time cap.
12,13: CT-ratio
14: Reconn. time
7
8
Alarm States: 9: Comp. error
1: I <
10: Export
2: I >
11: Swi tch No.
3: U <<
12: Step error
8: CHL >
13: Temp. >
6
0.98
6A
Power Factor Controller
C1
.....
C2-C6
C7
Load
Novar 1xxx
KMB systems
Novar1007D – installation
Novar 1xxx
KMB systems
Novar1106 – installation
68
Novar 1xxx
KMB systems
Novar1114 – installation
69
Novar 1xxx
KMB systems
Novar1206 – installation, low voltage measurement
70
Novar 1xxx
KMB systems
Novar1214 – installation, high voltage measurement
71
Novar 1xxx
KMB systems
Novar1114/S400 – installation
72
Novar 1xxx
KMB systems
Novar-1214/S400 – installation,
controller and contactors supllied from DC
73
Novar 1xxx
KMB systems
Novar1312 – installation, hybrid system with both thyristor
switches and contactors
74
Novar 1xxx
KMB systems
Novar-1005T – installation
75
Novar 1xxx
KMB systems
Novar1414 – installation, low voltage measurement
76
Novar 1xxx
KMB systems
Novar – RS-485 Communication Link Connection
NOVAR-206 214 / 232 485
Výr.č./verze.:
/
Datum výroby :
/
Nap.: 230 V~50/60 Hz Přík.: 10VA
IP 4X Made in Czech Republic
1
2
3
4
5
6
7
8
9
10 11 12 13 14
ALARM
NOVAR-206
77
NOVAR-214
Novar 1xxx
KMB systems
8. Technical Specifications
Adjustable Parameters
parameter
Novar Model
1106 / 1114
1206 / 1214 /
1414
1005 / 1007
1005D / 1007D
1005T
power factor desired
connection time (maximum value,
depends on control deviation)
reconnection delay time / control rate
smallest capacitor current
compensation section values setting
connection configuration setting
0.80 ind. through 0.80 cap.
5 to 1 200 seconds
1312
1312-3
1 ÷ 25 / sec
5 to 1 200 seconds
0.1 ÷ 10 sec
(0.02 ÷ 2 A) x CT
(0.002 ÷ 2 A) x CT ratio
automatic or manual
automatic or manual
Inputs and Outputs
power supply :
standard version
“/S400” version
measurement voltage
voltage measurement accuracy
voltage meas. input impedance
meas. voltage loss & external alarm
response time (output disconnection)
measurement current (galv. isolated)
peak overload
current input serial impedance / max.
burden power
current measurement accuracy
• range 0.5 ÷ 7A
• range 0.02 ÷ 0.5 A
• range 0.002 ÷ 0.02A
max. phase angle error ( PF &
powers measurement )
current harm. & THDI meas. accuracy
temperature meas. range / accuracy
number of output relays
80 ÷ 275 V AC
43 ÷ 67 Hz, 5VA
—
90 ÷ 275 V AC (43÷67 Hz)
or 100÷300 V DC, 7VA
75÷500 VAC
—
43 ÷ 67 Hz
or 90÷600 V
DC, 7VA
the same as power supply voltage
57.7 ÷ 690 V AC, +10/-20%,
43 ÷ 67 Hz
Novar1312-3 : 48 ÷ 52 Hz
( or 58÷62 Hz on request )
±1% of range ±1 digit
—
> 800 kOhm
<= 20 ms
0.02 ÷ 7 A
0.002 ÷ 7 A
70 A / 1 second; maximum repetition frequency > 5 minutes
< 10 mOhm / 0.5 VA
+/- 0.02A +/- 1 dig.
+/- 0.02A +/- 1 digit
+/- 0.002A +/- 1 dig
+/- 0.002A +/- 1 digit
—
+/- 0.0005A +/- 1 digit
+/-1° at I > 3 % of
+/-1° at I > 3 % of range, otherwise +/-3°
range,otherw. +/-5°
±5 % ± 1 digit (for U, I > 10 % of range)
-30 ÷ 60 °C, ± 5 °C
6/8R
6 / 14 R
12T + 2R
6T (for 1005T)
output relay load rating :
• standard version
•
“/S400” version
output transistor load capacity
90÷275 V AC
43÷67Hz,7VA
75÷500 V AC
43 ÷ 67 Hz
—
max. 100 VDC /
100 mA
(for 1005T)
78
250 V AC / 4 A
110 V DC / 0.3 A
250 V AC / 4 A ;
110 V DC / 0.5 A ;
220 V DC / 0.2 A
(400 V AC for overvoltage
cathegory II )
—
—
—
max. 100 VDC
/ 100 mA
Novar 1xxx
KMB systems
met. rate 2 input (galv. connected,
for insulated contact / optocoupler )
installation overvoltage class / level of
pollution
• for voltage up to 300 V AC
•
for voltage over 300 V AC
—
—
30 Vss / 5 mA
III-2 in compliance with EN 61010-1
—
II-2 in compliance with EN 61010-1
Communication
interface
transmission rate
maximum number of instruments on one communication line
maximum node–to–node distance
data transfer protocol
RS-485 / Ethernet 10/100 BASE-T,
galvanically isolated
4800 ÷ 19200 Baud
1/32
30 metres / 1200 metres
KMB / Modbus RTU
Operating Conditions
working environment
operating temperature
relative humidity
class C1 in compliance with IEC 654-1
-40° ÷ +60°C
5 to 100 %
EMC
noise suppression level
in compliance with EN 50081-2,
EN 55011 , class A,
EN 55022 , class A
in compliance with EN 61000-6-2
immunity
Physical
parameter
1005 / 1007 /
1005T
enclosure
• front panel
• back panel
dimensions
• front panel
• built-in depth
• installation cutout
mass
IP40 (IP54 option)
IP 20
Novar Model
1005D / 1007D
1206 / 1214 / 1312 / 1414
IP20
—
96 x 96 mm
106 x 100 mm
80 mm
58 mm
92+1 x 92+1 mm
—
max. 0.3 kg
79
IP40 (IP54 option)
IP 20
144 x 144 mm
80 mm
138+1 x 138+1 mm
max. 0.7 kg
Novar 1xxx
KMB systems
9. MAINTENANCE, TROUBLESHOOTING
Novar line power factor controllers do not require any maintenance. For reliable operation you only
have to comply with the operating conditions specified and prevent mechanical damage to the
instrument.
The controller’s power supply is one-pole protected with a mains fuse rated as T0.5A . The fuse is only
accessible after back disassembly and only the controller supplier’s qualified personnel may thus
replace it.
In the event of the product’s breakdown, you have to return it to the supplier at their address.
supplier:
manufacturer:
KMB systems, s.r.o.
559 Dr. M. Horákové
460 06, Liberec 7
Czech Republic
website: www.kmbsystems.eu
The product must be packed properly to prevent damage in transit. Description of the problem or its
symptoms must be sent along with the product. If warranty repair is claimed, the warranty certificate
must be sent in too. If after-warranty repair is requested, a written order must be included.
Warranty Certificate
Warranty period of 24 months from the date of purchase, however no later than within 30 months from
the dispatch date from manufacturer’s warehouse, is provided for the instrument. Problems in the
warranty period, evidently caused by poor workmanship, design or inconvenient material, will be
repaired free of charge by the manufacturer or an authorized servicing organization.
The warranty becomes void even within the warranty period if the user makes unauthorized
modifications or changes to the instrument, connects it to out-of-range quantities if the instrument is
damaged in out-of-specs impacts or from improper handling or if it has been operated in conflict with
the technical specifications.
type of product: NOVAR..............................
serial number ..............................................
date of dispatch: ...........................................
final quality inspection: ................................
manufacturer’s seal:
date of purchase: ...............................................
supplier’s seal:
80

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