What are the functions of an AC contactor?

[DeKayden]

The functions of an AC contactor are: as an actuating element, it is used to connect and disconnect circuits, or frequently control the operation of equipment such as electric motors. The following is relevant information: An AC contactor can be considered as an intermediate control element, with the advantage of frequently connecting and disconnecting circuits, generally using small current or voltage to control large current or voltage. When working in conjunction with a thermal relay, it can provide certain overload protection for load equipment. The working principle of an AC contactor: 1. When the coil is energized, the static iron core generates electromagnetic attraction, which pulls in the moving iron core. Since the contact system is linked with the moving iron core, the moving iron core drives three moving contact pieces to operate simultaneously, closing the contacts and thereby connecting the power supply. 2. When the coil is de-energized, the attraction disappears, and the moving iron core linkage part separates due to the reaction force of the spring, causing the main contacts to open and cutting off the power supply.