When 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, and control the large current with a small current.
In general speaking, the AC contactor is usually composed of several parts: moving, static main contact, auxiliary contact, arc shield, moving, static iron core and bracket housing.When working, the electromagnetic coil of the equipment is energized, and the movement and dynamic contact are contacted due to the suction. When the circuit is connected. When the electromagnetic coil is powered off, the moving core is automatically returned, and the movement and dynamic contact are separated, and the circuit is separated.
Because the AC contactors are mostly used for power disconnection and control circuit, in which the main contact of the contactor is mainly to execute the opening and closing of the circuit, and the auxiliary contact is used to command the control execution, the auxiliary contact should be prepared for two contacts that often open and close during normal use.It should be paid attention to that 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 overcurrent and grounding protection ability, 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 purchase contact equipment had better consult relevant personnel, according to their electrical appliances, the use of the circuit to choose 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 avoid too much error caused losses.
Post time: Feb-28-2022
