Double interlocking three-phase asynchronous motor control circuit

Shown in forward and reverse dual interlock control circuit, on the basis of the

control circuit in Figure 4-4 on the increase in the composite mechanical buttons mutual lock link. The advantage of this circuit is: If you want to run the motor forward reverse, do not press the stop button SB1, as long as the direct anti-press to turn the start button SB3; of course, from forward to reverse operation, as well. This circuit has a dual electrical and mechanical interlock, not only to improve the reliability of control, and can achieve a reverse forward a stop a stop control, but also to achieve a forward reverse a stop control.

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