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Automatically series reactance start three-phase motor circu

2016-09-03 01:38  
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Automatically series reactance start three-phase motor circuit 2
As shown in figure, pressing the start button ST, then the KM1 coil will pull in, and the main contacts are connected to reactors group L, the motor M gets to the buck start state. At the same time, due to the closure of the the KM1 auxiliary contacts, time relay KT gets electric timing. When the delay time reaches KT's tuning time, KT contacts are closed, KM2 coil gets electric, the normally closed contact cuts KM1 coil loop, then the KT coils have also de-energized, KM2 normally open contact action to protect themselves.