Буквенные коды наиболее распространенных элементов в электрических схемах

А — устройства, блоки
Комплектные устройства (панели, пульты, шкафы, ящики)  А
Усилители    А
Регуляторы     АА
Регуляторы тока     АА

Регуляторы частоты                                                                                                                                             АF

Регуляторы напряжения, возбуждения                                                                                                    АV

Регуляторы мощности                                                                                                                                       АW

Приводы исполнительных механизмов                                                                                                   АВ

Функциональные модули (в том числе кассетные)                                                                              АЕ

Блок реле, комплект зашиты                                                                                                                           AK

(типа КЗ, ДЗ, от замыканий на землю)

Устройство пуска осциллографа                                                                                                                  АКG

Устройство блокировки типа КРБ                                                                                                              АКВ

Устройство автоматического повторного включения (АПВ)                                                         АКS

Комплект продольной дифференциальной защиты линии                                                        АКW

Комплект реле сопротивления                                                                                                                      АКZ

ВЧ-приемопередатчик                                                                                                                                        АV

В - - преобразователи

Громкоговоритель                                                                                                                                               ВА

Телефон (капсюль)                                                                                                                                               ВF

Датчик температуры                                                                                                                                     ВК

Фотоэлемент                                                                                                                                                             ВL

Микрофон                                                                                                                                                               ВМ

Звукосниматель                                                                                                                                                     ВS

Сельсин, датчик                                                                                                                                                    ВG

Датчик давления                                                                                                                                                  ВР

Датчик скорости (тахометр)                                                                                                                            ВR

Счетчик вольт-ампер-часов реактивных                                                                                                ВVА

Счетчик ватт-часов                                                                                                                                             BW

С — конденсаторы

Конденсаторные силовые батареи                                                                                                             СВ

Блоки конденсаторные зарядные                                                                                                               СG

D — интегральные схемы, микросборки

Интегральная схема аналоговая                                                                                                                 DА

Интегральная схема цифровая, логический элемент                                                                        DD

Е — элементы разные

Реагирующий элемент (нуль-индикатор)                                                                                                ЕА

Нагревательный элемент                                                                                                                                 ЕК

Лампа осветительная                                                                                                                                            L

F — разрядники, предохранители, устройства защитные

Плавкий предохранитель                                                                                                                                  F

Разрядник (зашита от перенапряжений)                                                                                                 FV

Дискретный элемент зашиты по току мгновенного действия                                                        FА

То же инерционного действия                                                                                                                       FР

G — генераторы, источники питания

Генераторы переменного и постоянного тока                                                                                         G

Батареи аккумуляторные                                                                                                                                 GВ

Синхронный компенсатор                                                                                                                              GС

Возбудитель генератора                                                                                                                                    GЕ

Подвозбудитель (вспомогательный возбудитель)                                                                              GЕА

Н — устройства индикации н сигнализации

Приборы индикации и сигнализации                                                                                                      Н

Приборы звуковой сигнализации                                                                                                              НА

Индикатор символьный                                                                                                                                  НG

Лампа сигнализации                                                                                                                                         НL

Лампа сигнализации с красной линзой                                                                                                 НLR

Лампа сигнализации с белой линзой                                                                                                      НLW

Табло сигнальное                                                                                                                                              НLА

Лампа сигнальная с зеленой линзой                                                                                                       НLG

Индикаторы ионные и полупроводниковые                                                                                        НV

К — реле (в скобках приведено старое обозначение)

Реле                                                                                                                                                                           К (Р)

Реле тока                                                                                                                                                             КА (РТ)

Реле электротепловое                                                                                                                                         КК

Реле тока с насыщающимся трансформатором                                                                           КАТ (РТН)

Реле тока с торможением                                                                                                                         КАW (РTT)

Реле тока балансное                                                                                                                                  КАW (РТБ)

Фильтр-реле тока                                                                                                                                          KAZ(РТФ)

Реле блокировки                                                                                                                                            КВ (РБ)

Реле блокировки от многократных включений                                                                          КВS(РБМ)

Реле команды "включить"                                                                                                                      КСС (РКВ)

Реле команды "отключить"                                                                                                                    КСТ (РКО)

Реле положения выключателя "включено"                                                                                    КQC (РПВ)

Реле положения выключателя "отключено"                                                                                 КQТ (РПО)

Реле частоты (разности частот)                                                                                                               КF (РЧ)

Реле указательное                                                                                                                                          КН (РУ)

Реле импульсной сигнализации                                                                КНА (РИС)

Реле промежуточное                                                                                   КL (РП)

Реле ускорения зашиты                                                                              КL (РПУ)

Реле давления повторительное                                                                 КLР (РПД)

Контактор, пускатель                                                                                  КМ (КП)

Реле фиксации положения выключателя                                                     КQ (РФ)

Реле фиксации команды включения                                                          КQQ. (РФ)

Реле положения разъединителя (повторители)                                        КQS (РПР)

Реле контроля                                                                                              КS (РК)

Реле контроля синхронизма                                                                      КSS (РКС)

Реле контроля напряжения                                                                       КSV (РКН)

Реле газовое                                                                                                КSG (РГ)

Реле струи (напора)                                                                                    КSH (РС)

Реле времени                                                                                                КТ (РВ)

Реле напряжения                                                                                         КV (РН)

Фильтр реле напряжения                                                                          КVZ (РНФ)

Реле мощности                                                                                           KW (РМ)

Реле сопротивления                                                                                     KZ (РС)

L — катушки индуктивные

Дроссель, дроссель связи, дугогасящая катушка                                             L

Реактор                                                                                                            LR

Обмотка возбуждения генератора                                                                  LG

Обмотка возбуждения возбудителя                                                                LE

Обмотка возбуждения электродвигателя                                                       LM

М — двигатели (асинхронные и синхронные)                                             M

Р — приборы, измерительное оборудование

Амперметр                                                                                                       РА

Счетчик импульсов электромеханический                                                      РС

Осциллограф                                                                                                   РG

Частотомер                                                                                                       РF

Указатель положения регулирующего органа                                              РНЕ

Указатель положения РПН                                                                              РQ

Синхроноскоп                                                                                                  РS

Секундомер, часы                                                                                            РТ

Вольтметр                                                                                                        РV

Варметр                                                                                                          РVА

Ваттметр                                                                                                          РW

Счетчик активной энергии                                                                               РІ

Счетчик реактивной энергии                                                                           РК

Омметр                                                                                                             РR

Q — выключатели, разъединители в силовых цепях

Выключатель, выключатель-предохранитель                                                    Q

Короткозамыкатель                                                                                          QN

Отделитель                                                                                                       QR

Выключатель нагрузки                                                                                    QW

Разъединитель, рубильник                                                                               QS

Разъединитель—предохранитель                                                                       Q

Разъединитель заземляющий (стационарный)                                              QSG

Выключатель автоматический                                                                          QF

R — резисторы

Резисторы постоянные и переменные                                                                 R

Шунт измерительный                                                                                                    RS

Потенциометр                                                                                                   RP

Реостат                                                                                                                             RR

Терморезистор                                                                                                  RК

Варистор                                                                                                                          RU

S — устройства коммутационные схем управления

Рубильник                                                                                                           S

Переключатели, ключи цепей управления                                                      SА

Переключатели блокировки                                                                          SАВ

Переключатели (ключи) режима                                                                   SАС

Кнопка управления                                                                                           SВ

Коммутатор                                                                                                                     SC

Выключатель автоматический (автомат)                                                          SF

Блок испытательный                                                                                         SG

Переключатель измерений                                                                               SN

Переключатель синхронизации                                                                        SS

Накладка (оперативная контактная перемычка)                                              SХ

Выключатель, срабатывающий при достижении                                             SQ

заданного положения (концевой, путевой)

Т — трансформаторы, автотрансформаторы

Трансформатор тока                                                                                        ТА

Трансформатор напряжения                                                                            ТV

Трансреактор                                                                                                 ТАV

Трансформатор промежуточный                                                                     ТL

Электромагнитный стабилизатор                                                                     ТS

U — преобразователи электровеличин в электрические

Преобразователи тока                                                                                     UА

Преобразователи частоты                                                                                UF

Блоки питания БП                                                                                                          UG

Преобразователь напряжения                                                                                                                    UV

Инвертор                                                                                                                                                                UZ

V — приборы электровакуумные и полупроводниковые

Диоды, тиристоры, стабилитроны                                                                                                            VD

Электронно-вакуумный прибор                                                                                                                 VL

Выпрямительный мост                                                                                                                                   VS

Транзистор, фототранзистор                                                                                                                        VT

X — устройства соединительные

Соединение разъемное (клемма)                                                                                                                 X

Перемычка                                                                                                                                                             ХВ

Испытательный зажим                                                                                                                                   ХG

Соединение неразборное                                                                                                                               XN

Соединение разборное (клеммы)                                                                                                               ХТ

Контакт скользящий, токосъемник                                                                                                          ХА

Штырь                                                                                                                                                                     ХР

Гнездо                                                                                                                                                                      ХS

Y — устройства механические с электромагнитным приводом

Электромагнит                                                                                                                                                    YА

Замок электромагнитной блокировки                                                                                                   YАВ

Электромагнит включения ЭВ                                                                                                                    YАС

Электромагнит отключения ЭО                                                                                                                 YАТ

Тормоз с электромагнитным приводом                                                                                                  YВ

Муфта с электромагнитным приводом                                                                                                   YС

Z — устройства оконечные, фильтры, ограничители

Фильтр тока                                                                                                                                                          ZA

Фильтр частоты                                                                                                                                                  ZF

Фильтр напряжения                                                                                                                                        ZV