接触器是一种用来接通或断开带负载的交直流主电路或大容量控制电路的自动化切换器，主要控制对象是电动机，此外也用于其他电力负载，如电热器，电焊机，照明设备，接触器不仅能接通和切断电路，而且还具有低电压释放保护作用/。接触器控制容量大。适用于频繁操作和远距离控制。是自动控制系统中的重要元件之一。通用接触器可大致分以下两类。
A contactor is an automatic switch used to connect or disconnect the loaded AC / DC main circuit or large capacity control circuit. The main control object is the motor, and it is also used for other electric loads, such as electric heater, electric welding machine, lighting equipment, and the contactor can not only connect and cut off the circuit, but also have low voltage release. Put the protective effect. The contactor has a large control capacity. It is suitable for frequent operation and long distance control. It is one of the most important components in the automatic control system. The general contactor can be roughly divided into two categories.
1交流接触器。主要有电磁机构。触头系统。灭弧装置等组成。。常用的是CJ10。CJ12。CJ12B等系列。。。
1 AC contactor. There are mainly electromagnetic mechanisms. The contact system. Arc extinguishing device and so on. The common one is CJ10. CJ12. CJ12B and so on.
2直流接触器，一般用于控制直流电器设备，线圈中通以直流电，直流接触器的动作原理和结构基本上与交流接触器是相同的。
The 2 DC contactor is generally used to control the DC electrical equipment. The coil is connected to the DC electric. The action principle and structure of the DC contactor are basically the same as the AC contactor.