AC contactors 1L1, 3L2, 5L3 are contactor power supply side, connected with three-phase power supply.

2T1, 4T2 and 6T3 are load side loads.

AC contactor usually adopts three arc extinguishing methods: double fracture electric arc extinguishing, longitudinal slot arc extinguishing and grid arc extinguishing. It is used to eliminate the arc generated by the dynamic and static contacts in the process of splitting and closing. Contactors with capacities above 10A have arc extinguishing devices. The AC contactor also has auxiliary components such as reaction spring, buffer spring, contact pressure spring, transmission mechanism, base and connection post.