Contactor is divided into AC contactor (voltage AC) DC contactor (voltage DC), which is used in power, distribution electric field. In a broad sense, contactor refers to an electrical appliance that uses coil current to generate magnetic field to close contact control load.

In Electrotechnics, because it can quickly cut off the AC DC main circuit frequently connect with the high current control circuit (up to 800A), it is often used as the control object of the motor, can also be used to control the electrical load of factory equipment, electric heater, working mother machine various electric power units. The contactor can only connect cut off the circuit, but also has low voltage release Protection. Contactor control capacity is large, suitable for frequent operation remote control, is one of the important components in automatic control system.

What are the requirements of DC contactor acting on frequency converter?

Contactors are mainly used for industrial control, the majority of loads are motors. Of course, there will be some heaters dual power supply switching. The on-off of the contactor is realized by controlling the coil voltage. According to the different structure of arc extinguishing, it can be divided into vacuum contactor common contactor. According to different control voltage can be divided into DC contactor AC contactor, its main accessories are auxiliary contacts.

In industrial electrical, there are many types of contactors, the working current ranges 5A to 1000A, which is widely used.

At present, air electromagnetic AC contactor air electromagnetic DC contactor are widely used. It is abbreviated as AC contactor DC contactor port. The commonly used AC contactor models are cj20, CJ40 B series products. The commonly used DC contactor models are CZ0, cz18 other series products.