What is the function of an AC contactor?

[LouisLee]

AC contactors are generally used to start equipment. By utilizing different control wiring methods, they can control the forward and reverse rotation, start and stop of motors, and achieve remote control through the length of control cables. Changing the wiring method can also enable multi-point control. AC contactors are a type of low-voltage control device widely used in power drive and automatic control systems. As an actuating element, they are used to connect or disconnect circuits or frequently control the operation of equipment such as motors. They consist of moving and stationary main contacts, an arc extinguishing cover, moving and stationary iron cores, auxiliary contacts, and a bracket housing. When the electromagnetic coil is energized, the moving iron core is attracted by the electromagnetic force, causing the moving contacts to come into contact with the stationary contacts directly or through lever transmission, thereby connecting the circuit. When the electromagnetic coil is de-energized, the moving iron core automatically returns under the action of the reset spring, commonly referred to as release, and the contacts separate, disconnecting the circuit.