Talking about the 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 the power, to control the large current with a 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 the movement contact 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 disconnection and control circuit, the main contact of the contactor is mainly the opening and closing of the execution circuit, the auxiliary contact is used for command control execution, so the auxiliary contact should be often open and closed two contacts in normal use. We need to pay attention to one point is that because the carrying current of the AC contactor 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: Dec-20-2022
