What are the three main components of an AC contactor?

[McIsabelle]

An AC contactor mainly consists of an electromagnetic system, a contact system, and an arc extinguishing system. It is generally used to start equipment, control the forward and reverse rotation, start and stop of motors through different control wiring methods, and achieve remote control by adjusting the length of control cables. Changing the wiring method can also enable multi-point control. The AC contactor is a common low-voltage control device in power drive and automatic control systems. When the electromagnetic coil is energized, the moving iron core is attracted by electromagnetic force, causing the moving contacts to directly or through lever transmission come into contact with the stationary contacts, thus closing the circuit. When the electromagnetic coil is de-energized, the moving iron core automatically returns under the action of the reset spring.