Talking about AC contactor, I believe that many friends in the mechanical and electrical industry are very familiar with it, it is a kind of low voltage control in the power drag and automatic control system, used to cut off power, control large current with small current.
Generally speaking, the AC contactor is usually composed of dynamic and static main contact, auxiliary contact, arc extinguishing cover, dynamic and static iron core and bracket shell. When working, the electromagnetic coil of the equipment is energized, and the dynamic and static contacts contact due to the suction core. At this time, the circuit is connected. When the electromagnetic coil is powered off, the moving core automatically returns to the action, and the dynamic contacts are separated, and the circuit is separated.
Because the AC contactor is mostly used for power off and control circuits, the main contact of the contactor is mainly to perform the opening and closing of the circuit, and the auxiliary contact is used for the control execution of instructions, so the auxiliary contact should have two contacts on the normal open and close in ordinary use. What we need to pay attention to one point is that because the bearing current of the AC contactor is large, it is easy to trip when lightning weather. This is because the AC contactor itself has the function of overcurrent and grounding protection. When lightning, the line automatically cut off the power supply to protect the equipment and prevent damage by high voltage and high current.
In addition, in order to ensure the service life of the ac contactor, people in the purchase contactor equipment is best can consult relevant personnel, according to their electrical appliances, the usage of the circuit selection capacity and action frequency corresponding contactor, different wet, acid and alkali environment also should choose special configuration of ac contactor, in order to avoid excessive error.
Post time: Mar-09-2023
