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 pass power off, to control the large current with small current.
Generally speaking, the AC contactor is usually composed of several parts: moving, static main contact, auxiliary contact, arc extinguishing cover, moving and static iron core and bracket housing. When working, the electromagnetic coil of the equipment is energized, and the movement core makes contact. At this time, the circuit is connected. When the electromagnetic coil is powered off, the movement core automatically returns to the action, and the circuit is separated.
Because the AC contactor is mostly used for power off and control circuit, the main contact of the contactor is mainly the opening and closing of the execution circuit, and the auxiliary contact is used to command the control execution, so the auxiliary contact should be prepared for two contacts often open and closed in normal use. We need to pay attention to one point is because the AC contactor carrying current is large, it is easy to trip when encountered in lightning weather, this is because the AC contactor itself has the function of overcurrent and grounding protection, the line encountered lightning automatically cut off the power supply to protect the equipment, to prevent high voltage, high current damage.
In addition, in order to ensure the service life of ac contactor, people in the choose and buy contactor equipment had better consult relevant personnel, according to their electrical appliances, the use of the circuit selection capacity and action frequency corresponding contactor, different wet, acid and base environment also want to choose a special configuration of ac contactor, so as not to cause excessive error losses
Post time: Oct-19-2022
