Circuit breakers are generally composed of contact systems, arc extinguishing systems, operating mechanisms, trippers, and housings.
When the coil is energized, the static iron core generates electromagnetic attraction to attract the moving iron core. Since the contact system is linked with the moving iron core, the moving iron core drives the three moving contact pieces to move at the same time, the main contact is closed, the auxiliary normally closed contact mechanically connected to the main contact is disconnected,
ABB AC contactor is an intermediate control element. Its advantage is that it can frequently open and close the circuit and control large current with small current. It can also play a certain role in overload protection for load equipment when working with thermal relays.
