The working principle of the AC contactor is to use the electromagnetic force and the spring force to cooperate to realize the connection and breaking of the contact. AC contactors have two working states: power-off state (release state) and power-on state (action state). When the attracting coil is energized, the static iron core generates electromagnetic attraction, the armature is attracted, and the connecting rod connected with the armature drives the contact action, so that the normally closed contact breaker is in the energized state; when the attracting coil is powered off, The electromagnetic attraction disappears, the armature is reopening, so that the normally open contact is closed, and released under the action of the position spring, all the contacts are reset and the contactor is in a power-off state.
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