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Three-phase motor for single-line remote commutation circuit

2016-09-01 14:56  
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Three-phase motor for single-line remote commutation circuit
In some cases, it is needed to control motor’s starting-stopping and switching operation far away from the motor. The circuit designed for meeting this requirement is shown in the figure. Set up a wire (single wire) just as shown in the figure and select the “remote control selector switch SA. When the SA is at the position 1 , the local motor stops working. When the SA is at the position 2 , the local relay K1 creates the loop by passing through VD3, ground, VD1, SA and transformer T. When the K1 takes action, its contact connects to coil circuit of the AC contactor. And the motor transfers to run forward.