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[Chemical Knowledge]：Function and Application Field of AC Contactor

Read： 429 Time：18months ago Source：Transform the World with Simplicity

An AC contactor is an electrical controller used to control the switching state of current in an AC circuit. It consists of two parts: the control circuit and the contactor itself. It usually uses an electromagnetic structure and can switch current quickly and reliably. The function of AC contactor is mainly to switch circuit, which is often used in leakage protection, motor control, power switch and other occasions.

Next, we will introduce in detail the basic principles and specific functions of AC contactors. The principle of

1. AC contactor
The control circuit of
AC contactor usually adopts electromagnetic structure and has two coils, namely, control coil and execution coil. When AC voltage passes through the control coil, a magnetic field is generated, which attracts the actuator coil, thereby compacting the contact. On the other hand, when the power is disconnected, the power will be lost, and the contact of the contactor will also be disconnected.

AC contactor is mainly composed of two contacts, called the main contact and auxiliary contact. The main contact is responsible for the connection and disconnection of the main circuit, and the auxiliary contact can be connected to the auxiliary electrical device through the control circuit. The entire switching process is controlled by the linkage between the control coil and the actuator coil.

2. The role of AC contactors

1. Leakage protection

In the household and industrial fields, AC contactors are usually used for leakage protection. When leakage occurs, the current will cause the fixed current transformer to generate an electromagnetic field, and then control the disconnection of the AC contactor through the control coil. Leakage protection can help protect personal safety and electrical equipment.

2. Control motor

AC contactors are widely used in the field of motor control. In this process, the contactor is used as the center of electrical control operations such as start, stop, forward and reverse, and is controlled by the control coil.

3. power switch

ac contactors are often used in power switches. It can be used as a switch to control the power supply of electrical equipment.

4. Medical equipment

AC contactors also play an important role in the medical field. It is usually used to control the power switch of operating rooms, hospital medical equipment and medical waste treatment machines.

5. Power field

AC contactors are also widely used in the power field to control and protect electrical equipment, such as generators, transformers, line switches, etc.