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Three-phase motor button interlocking for switching circuit

2016-09-04 04:08  
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Three-phase motor button interlocking for switching circuit
The three-phase motor button interlocking for switching circuit is shown in the figure. This circuit uses a composite button (this is that a button has a pair of normally opened contacts and a pair of normally closed contacts inside, thus ensuring the simultaneous action while being pressed), in order to achieve the button’s interlocking connection. When the motor is running forward, press the button STR to make the KMF lose electricity immediately. And the motor stops and run into the reverse immediately. And vice versa. This not only ensures the not simultaneous action of the reversing contactor KMF and KMR, but also ensure that it start in reverse by directly pressing reverse button rather than the stop button.