1. AC contactor structure AC contactor is mainly composed of coil, core (static core), armature (moving core), main contact and auxiliary contact...
2. The working principle of contactor is: when the coil is energized, the magnetic field is generated, and the static iron core generates the electromagnetic force to attract the iron core, thus driving the contact...
3. The arc extinguishing device of AC contactor is usually larger than 20A contactor. The main contact should be equipped with an arc extinguishing device.AC contactor in cutting off large...
4. AC contactor and DC contactor difference AC contactor core is composed of silicon steel sheet one by one, the purpose is to reduce the core...
Ac contactor is widely used as the power of open circuit and control circuit. It use main contact to open and close circuit, to perform the control instruction with auxiliary contacts. Main contact usually only normally open contacts and auxiliary contacts often two to have often opened the function of normally closed contacts, small contactor is also often used as intermediate relay with main circuit.Ac contactor contact, made of silver tungsten alloy has good electrical conductivity and high temperature erosion resistance.Ac contactor has four main components: (1) the electromagnetic system, including attracting coil, moving iron core and static iron core; (2) the contact system, including three main contactor and two normally open, normally closed, auxiliary contacts, it is even with the moving iron core of linked together with each other; (3) arc extinguishing device, generally larger capacity of ac contactor has arc extinguishing device, in order to quickly cut off the electric arc, rabbit to burn out the main contactor; (4) insulation shell and accessories, all kinds of springs, transmission mechanism, short circuit ring, terminal, etc.
When the electromagnetic coil is not energized the contactor, spring reaction force and bit core weight to keep main contact disconnected position. By controlling when electromagnetic wire, loop through the control voltage (generally rated voltage, the electromagnetic force to overcome the spring inhale armature reaction to the static iron core, drive the main contact closure, processing circuit, auxiliary contact action accordingly.
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