The AC contactor uses the main contact to open and close the circuit and the auxiliary contact to turn on the control loop.
The main contact is normally a normally open contact, while the auxiliary contact often has two pairs of normally open contact and normally closed contact. The small contactor is often used as an intermediate relay in conjunction with the main circuit.
The contact of the AC contactor is made of silver-tungsten alloy and has good electrical conductivity and high temperature ablation resistance.
The power of the AC contactor is derived from the AC magnetic field generated by the core coil. The electromagnetic core is formed by stacking two "shan"-shaped silicon steel sheets. One of the fixed cores is covered with a coil, and the working voltage can be varied. select. In order to stabilize the magnetic force, a short circuit ring is added to the suction surface of the iron core. AC contactors rely on spring return after power loss.
The other half is an active iron core, which is constructed and fixed like a core to drive the closing of main and auxiliary contacts.
Contactors with more than 20 amps are equipped with an arc extinguishing cover, which uses the electromagnetic force generated when the circuit is disconnected to quickly break the arc and protect the contacts.
The contact device can be operated at a high frequency. When the power is switched on and off, the maximum operating frequency is up to 1200 times per hour.
The service life of contactors is high, the mechanical life is usually several million to ten million times, and the electrical life is generally several hundred thousand to several million times.
The main contact is normally a normally open contact, while the auxiliary contact often has two pairs of normally open contact and normally closed contact. The small contactor is often used as an intermediate relay in conjunction with the main circuit.
The contact of the AC contactor is made of silver-tungsten alloy and has good electrical conductivity and high temperature ablation resistance.
The power of the AC contactor is derived from the AC magnetic field generated by the core coil. The electromagnetic core is formed by stacking two "shan"-shaped silicon steel sheets. One of the fixed cores is covered with a coil, and the working voltage can be varied. select. In order to stabilize the magnetic force, a short circuit ring is added to the suction surface of the iron core. AC contactors rely on spring return after power loss.
The other half is an active iron core, which is constructed and fixed like a core to drive the closing of main and auxiliary contacts.
Contactors with more than 20 amps are equipped with an arc extinguishing cover, which uses the electromagnetic force generated when the circuit is disconnected to quickly break the arc and protect the contacts.
The contact device can be operated at a high frequency. When the power is switched on and off, the maximum operating frequency is up to 1200 times per hour.
The service life of contactors is high, the mechanical life is usually several million to ten million times, and the electrical life is generally several hundred thousand to several million times.
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Yizheng Beide Material Co., Ltd. , https://www.beidevendor.com