Function of main contact and auxiliary contact of AC contactor

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The main contact of AC contactor controls the opening and closing of main circuit.

Contact point and auxiliary contact point are set to assist AC contactor to operate main circuit.

Contact, main contact and auxiliary contact are linked. There are two cases of auxiliary contact, one is normally open, the other is normally closed. When the main contact is closed, the normally open of auxiliary contact changes to closed, and the normally closed contact turns on and off.

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