Выбор аппаратуры управления, защиты, регулирования, контроля параметров и перемещения для надёжной безаварийной работы электропривода, страница 8

            +                                                         -                                                                                                                                                                                                                                                                                                                                                                                                                КМ1                                                 КМ1                                                                                                  LM            КА1                       КМ2               ОЯ           КМ2                                                                           +                                                               -                                                                                                                                                                                        I<                                                                                                                                                                                                                                                                                                                                                                                                            SA2                                                                                                   SA1                                                               KM1                                                                                                                                                                      +                                                                                                               -                                                                                                                                                                                             KM1.1                                                                                                                                                                                                                                                                     KM1.2        KA1.1                    KM2                                                                                                                                                                  

Рисунок 3.6 – Схема включения реле минимального тока в схему

                                   управления ДПТ пря реализации защиты от обрыва

                                   обмотки возбуждения (минимально-токовая защита)

                                                                                                                                                                                                     ОЯ                                                                                       +            KM1                            КМ1                        -                                                                                                                                                                                                                                                                                                                            КМ2                                                                     КМ2                                                              LM                                  КА1                                                                                                                                                                                                                                                                                                                                                       R                                VD1                I<                                                                                                                                                                                                                                                                                                                                                                                                                                                           Рисунок 3.7 – Схема реализации защиты от перенапряжения

                                  в обмотке возбуждения ДПТ при её отключении

          +                                                -         +           КМ2                       ОЯ

                                                                                                                                                КМ1                             КМ1                                                                                                                                                               RLM              КА1                    U>                                                                                                                                                KV1                                                                                                                                      KM2                                                                           I<        -                                                                                                                                                                                                                                                           SB2                                                                                                    SB1                                                                KM1                                    +                                                                                                      -                                                                                                                                                                                                          KM1.1                                                                                                                                                                                                                                                                                                             KM2                                                                        KM1.2        KA1.1                                                                                                                                     KV1.1