The working principle of AC contactor

The basic principle of the AC contactor is to use the electromagnetic principle to drive the contact through the control circuit and the movable armature to control the on-off of the main circuit. Its working process: When the AC contactor coil is energized, its static iron core generates electromagnetic attraction, which attracts the moving iron core, and then drives the main contact to close. At the same time, the auxiliary contacts of the AC contactor are normally open to normally closed, and normally closed to normally open. When the AC contactor coil loses power, the electromagnetic force generated by the static iron core disappears, and the movable iron core is reset under the action of the spring reaction force, and then each contact is reset, and all return to the initial state.