AC contactors often use three arc extinguishing methods: double-fault electric arc extinguishing, longitudinal slit arc extinguishing and grid arc extinguishing. It is used to eliminate the arc generated by the moving and static contacts in the opening and closing process. Contactors with a capacity above 10A have arc extinguishing devices. The AC contactor also has auxiliary components such as reaction spring, buffer spring, contact pressure spring, transmission mechanism, base and terminal
Chinese name '交流接触器' foreign name AC contactor
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 attraction 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 break contactor is in the energized state; when the attraction 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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