نقد و بررسی تخصصی IS200TTPWH1AAB
Large steam turbines use 24 V dc electrical trip solenoid valves (ETSV) board.
Power for these valves is provided to the TRPL and TREL trip boards by a power
transition board TTPW. Wiring from the rack power supplies, through TTPW, to the
trip board is shown in the following figure.