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Motor Phase Failure Protector (3)

2016-09-03 07:32  
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Motor Phase Failure Protector (3)
When S2 is pushed, KM is connected and KM1-KM4 are connected. M begins to work. LEDs in VLC1-VLC3 are illuminated. V is connected and K is connected. When S2 is released, KM keeps connected. When there is phase failure, V is disconnected and K is disconnected. When S2 is released, KM is released and this will protect the circuit.