BKSF-□2 series control cabinet control protection circuit diagram

The electrical diagram of the BKSF-port 2 series control cabinet is shown in Figure 7+17; the control and protection circuit diagram of the BKSF-port 2 series control cabinet is shown in
Figure 7-18.
    In the figure, 1PA-3PA are U, V, and W phase ammeters, and PV is an AC voltmeter. PF is the frequency meter, PC is the power
factor meter, PW is the active power meter, RRJ is the reactive energy meter, PJ is the active energy meter, 1KS is the over-current signal
relay, 2KS is the over-voltage signal relay, 1HL~3HL is the same period. Indicator lights, 4HL is the closing indicator light, SHL
is the opening indicator light, 6HL is the water resistor input indicator light, 7HL is the water resistor cut off indicator light, BKQ is the quasi-synchronous grid-connector
, and 3SA is the voltage conversion switch. 4SA is the synchronization transfer switch, 1SB is the water resistance input button, 2SB is the water resistance cut-
off button, 3SB is the closing button, 4SB is the opening/energy storage button, os is the isolation switch, QF is the circuit breaker, 1F-3F
is Wide type lightning arrester, FU is a fuse, 1KM is a water resistance switching contactor, 2KM and 3KM are load increasing and load reducing
contactors, SSB and 6SB are load increasing and load reducing contactors, lsQ and 2SQ are travel switches, B For AC bell. There are also
4 spare light-letter signs.
    Water resistance is currently rarely used in small hydropower stations. The lkM contactor can be used to act as a deflector or water guide vane device
to prevent overrunning.