The centralized controller of drainage and irrigation pumping station One

Published:2011/8/8 20:33:00 Author:Felicity | Keyword: drainage and irrigation pumping station , centralized controller, | From:SeekIC

When the control room starts, the switch Q turns on. After S1 is pressed ,the phase voltage of L2 goes through S1,R1,signal line a, normally close contact of KM,KA (to null line N or ground) to make up current circuit. And KA turns on and closes, and the normally open contact KA1 switched on, the normally closed contact M2 switched off. And the phase voltage goes to phase L3 to form a circuit. After fast discharging of K, the inner contact closes to make KM turns on, and the normally open contact closes, the pump motor starting.



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