AC contactors often use three arc extinguishing methods: double-break electric arc extinguishing, longitudinal slot arc extinguishing and grid arc extinguishing. It is used to eliminate the dynamic and static contacts in the AC contactor. The working principle of the AC contactor is to use the electromagnetic force to cooperate with the spring force to realize the connection and breaking of the contacts. The AC contactor has two working states: de-energized state (release state) and energized state (action state). When the attraction coil is energized, the static iron core generates electromagnetic attraction, the armature is attracted, and the connecting rod connected to the armature drives the contact to move, so that the normally closed contact breaker contactor is in an energized state; when the attraction coil is powered off, The electromagnetic suction disappears, the armature is reopening, the normally open contact is closed, and released under the action of the position spring, all contacts are reset accordingly, and the contactor is in a power-off state. The arc generated during the opening and closing process. Contactors with a capacity above 10A have arc extinguishing devices. AC contactors also have auxiliary components such as reaction springs, buffer springs, contact pressure springs, transmission mechanisms, bases, and terminal posts.
Post time: Jun-28-2023
