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Motor Phase Failure Protector (2)

2016-09-02 18:49  
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Motor Phase Failure Protector (2)
When S2 is pushed, K is connected. When S2 is released, M keeps working. When phase L1,L2 fail, TA will generate signal voltage and makes V1 connected. V3 is disconnected. K is released. KM is released. M's working power is cut off. When phase L3 fails, TA has no voltage and V3 V2 are disconnected. M stops working.