Реле мощности

30 июля 2015г. - 9:03 4373 просмотров


Реле мощностиРеле мощности в большинстве случаев определяют, где именно случилась аварийная ситуация или какая-то нестыковка. Но если производить более точную оценку того, правильно ли работает реле направления мощности, намного удобнее использовать такую формулу вращающегося момента, которая выражается через напряжение, которое подводится к прибору.

Для того чтобы устройство правильно работало, необходимо, чтобы напряжение, которое к нему подводится, было больше чем Ucvmin.

Оно будет включенным, когда будут несимметричные короткие замыкания. На маленькой среде базируется мертвая зона, но она появляется только в металлических трехфазных замыканиях.

Вторичные потоки измеряют, когда проводят проверку направленных защит, также токи небаланса в нулевых проводах и в рабочих обмотках дифференциальных защит.

Потом смотрят на правильность подсоединения цепей напряжения к прибору с помощью изъятия векторных диаграмм. В тоже время, когда снимаются векторные диаграммы, обязательно проверяют также и зоны, в которых действуют реле направления мощности, а также поддают проверке именно сам выбор направления реле мощности направленных защит.


Внешний дизайн реле мощности
И, наконец, реле направления мощности (РМ) также могут использоваться, например, в самых разных устройствах защиты для того, чтобы определить мощность.

Структура: У этого устройства есть две обмотки. Первая имеет подключение к ТТ, а также она обволакивается вторичным током Iр, тогда как вторая имеет подключение к ТН и обволакивается таким током, который прямо пропорциональный тому напряжению, которое находится на зажимах (Uр).

Эти два тока имеют свои разные потоки. Они пропорциональный разным токам (первый – Ip, второй — Uр), при таком раскладе направление мощности, то есть знак вращающегося момента, напрямую определяет направленность данной мощности.

Схема включения реле мощности

Реле ограничения мощности

Реле ограничения мощности

С помощью данного прибора можно:

  • Во-первых, обезопасить покупателя от некоторых некачественных деталей в электрической сети;
  • Во-вторых, его используют также для отключения загрузки, когда мощность, которую используют, зашкаливает за нормы, на некоторый период времени;
  • В-третьих, его используют при неполном выключении загрузки, когда напряжение зашкаливает за норму на какой-то определенный период времени;
  • Его также используют при напряжении нулевом, обратном, а также в напряженной последовательности;
  • Когда используется загрузка очень высокой мощности;
  • Также используется при предупреждении об возможных аварийных ситуациях;
  • Также их используют, корда загрузка подключается дистанционно к интерфейсу;
  • Данное устройство может поддерживать работу с той нагрузкой, которая превышает 2,5 кВт и они также поддерживают работу с нагрузкой до 30 кВт.
  • Также при не очень качественном напряжении, характерными для этой ситуации есть очень большие скачки напряжения, перекос, нарушение очередности;
  • Если вы пресекаете допустимый предел тока, то есть превышаете максимум, и слишком увеличиваете загрузку.

Реле ограничения мощности ОМ-110

Реле ограничения мощности ОМ-110

Реле ограничения мощности ОМ-110 используется для проведения контроля активной или полной мощности однофазной нагрузки.

Диапазон, который поддается измерению: от 0 до 20 кВт возможно также от 0 до 20 кВА.

Возможности ОМ-110: отключает некоторые загрузки, при чрезмерном увеличении уровня загрузки, после этого автоматически производит включение.

Можно увидеть, что спереди на устройстве находятся специальные потенциометры, а также дип-переключатели, с помощью которых человек может быстро уяснить:

  • Во-первых, это максимальный уровень мощности;
  • Во-вторых, это время срабатывания;
  • В-третьих, это также время задержки автоматического повторного включения (АПВ).

Измерение мощности, которую он потребляет, происходит без роз соединения электрической цепи, при этом используется специальный токовый датчик, который встроенный в сам прибор.

Модель ОМ-110 может применяться, например, как цифровой ваттметр, то есть как прибор, который измеряет мощность как активной, так и погной.

Также она может применяться как устройство ограничения мощности, которая потребляется.

Питание ОМ-110 осуществляется от цепей измерения напряжения.


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