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Multifunctional Motor Protector (1)

2016-09-04 20:10  
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Multifunctional Motor Protector (1)
When the motor works well, N1-N3's in-phase input terminals have higher voltage than reference voltage. N4's opposite phase has a lower voltage than the reference voltage. N1-N4 output high level. VD8-VD11 are disconnected. V,VD13,VD14 are connected. When the motor doesn't work well, V is disconnected and K is released.KM is released. M's working power will be cut off. When the motor is overload, W's opposite phase will have a higher voltage than the reference voltage. N4 outputs low level and VD11 is connected, V is disconnected. K and KM are released. The motor's working power will be cut off.