The principle of the contactor

Contactors working principle is: When the contactor coil is energized, the coil current creates a magnetic field, static magnetic field generated by the electromagnetic attraction to attract core plunger, and promote exchanges and contacts point action, normallyAir circuit breaker closed contacts open, normally open contacts are closed, the two are linked. When the coil is de-energized, the electromagnetic suction disappears, the armature is released Electric energy meter under the action of a spring release, the contacts recover, normally open contacts open, normally closed contact is closed. DC contactor temperature switch works with the principle somewhat similar.