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Motor Phase Failure Protector (5)

2016-09-03 19:51  
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Motor Phase Failure Protector (5)
When S2 is pushed, the voltage between L2 and L3 will be put on KM through S1,S2,K,KR. KM will be connected. M begins to work. The other circuit will provide the drive circuit with 12V working voltage. At the same time, VL is illuminated. When the three phases work well, V1 V2 are disconnected and K is released. When there is phase failure, there will be a voltage between VD1 and N, which will make V1 V2 are connected after filtration and rectification. K is connected and KM is released. M's working power is cut off.