What is electromagnetic contactor? The time relay is one of the important components in the automatic control system. When the electromagnetic coil of the contactor is energized, a strong magnetic field will be generated, which makes the static iron core generate electromagnetic attraction to attract the armature and drive the contact to act: normally closed contact is disconnected, and normally open contact is closed, both of which are linked. When the coil is powered off, the electromagnetic force disappears, and the armature is released under the action of the release spring to restore the contact: the normally closed contact is closed, and the normally open contact is disconnected. Let's talk about its classification.

1、直流接触器

1. DC contactor

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。因为可快速切断交流与直流主回路和可频繁地接通与大电流控制（某些型别可达800安培）电路的装置，所以时间继电器小编告诉大家它经常运用于电动机做为控制对象﹐也可用作控制工厂设备﹑电热器﹑工作母机和各样电力机组等电力负载，并作为远距离控制装置。

It is generally used to control DC electrical equipment. The coil is charged with DC. The operation principle and structure of DC contactor are basically the same as that of AC contactor. Because it can quickly cut off the AC and DC main circuit and frequently connect with the high current control circuit (some types can reach 800 Amperes), the time relay tells us that it is often used to control the motor as the control object, and can also be used to control the power load of factory equipment, electric heater, machine tool and various power units, And as a remote control device.

2、交流接触器

2. AC contactor

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。

It is mainly composed of electromagnetic mechanism, contact system and arc extinguishing device. CJ10, cj12, cj12b and other series are commonly used.

因为交流电磁接触器的线圈一般采用交流电源供电，在接触器激磁之後，通常会有一声高分贝的“咯”的噪音，这也成为电磁式接触器的特色。虽然80年代后，各国有发展交流接触器电磁铁的无声和节电，基本的可行方案之一是将交流电源用变压器降压后﹐再经内部整流器转变成直流电源後供电，但此复杂控制方式并不多见。

Because the coil of AC electromagnetic contactor is generally powered by AC power supply, after the contactor is excited, there is usually a high decibel noise, which has become the characteristic of electromagnetic contactor. Although after the 1980s, countries have developed silent and energy-saving AC contactor electromagnet, one of the basic feasible solutions is to reduce the voltage of AC power supply with transformer, and then convert it into DC power supply through internal rectifier, but this complex control mode is rare.

3、半导体接触器

3. Semiconductor contactor

半导体接触器使用改变电路回路的导通状态和断路状态而完成电流操作的接触器。

Semiconductor contactors use contactors that change the on state and open state of circuit circuits to complete current operation.

4、真空接触器

4. Vacuum contactor

真空接触器为接点系统采用真空消磁室的接触器。

The vacuum contactor is the contact, and the vacuum degaussing chamber contactor is used in the system.

5、空气式接触器

5. Air contactor

主要由接点系统、电磁操动系统、支架、辅助接点和外壳（或底架）组成。

It is mainly composed of contact system, electromagnetic operation system, bracket, auxiliary contact and shell (or underframe).

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。以上就是ABB时间继电器小编*所分享的全部内容了，不知道大家有没有都了解了呢？

The contactor can not only turn on and cut off the circuit, but also has the function of low voltage release protection. That's all the time relay Xiaobian shared. I don't know if you all understand it?