Three-phase motor uses three-contactor commutation circuit
Source: InternetPublisher:拿铁三分糖 Updated: 2014/04/26
In the circuit shown in the figure, three AC contactors KMF, KMR and KM are used. This means that each time the motor is disconnected, the main contacts increase to four disconnecting points - (two more contacts than the second contactor). point), which can effectively extinguish the arc on and off the contactor and prevent arc short-circuit faults.
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