Working principle of AC contactors

The working principle of an AC contactor is to use electromagnetic force in combination with spring force to achieve the connection and disconnection of the contacts. AC contactors have two working states: power-off state (release state) and power-off state (action state). When the attraction coil is energized, the static iron core generates electromagnetic attraction, and the armature is attracted. The connecting rod connected to the armature drives the contact to move, causing the normally closed contact to break and the contactor to be in an energized state; When the attraction coil loses power, the electromagnetic attraction disappears, and the armature reopens, causing the normally open contact to close. Under the action of the position spring, it is released, and all contacts are reset. The contactor is in a state of power loss.