What is the function of an AC contactor?

1.In the circuit, it plays the role of turning on and off the power supply, and also has the effect of undervoltage release. When the circuit pressure is 0, it can control the large capacity, which is used to control the circuit, and the service life is relatively long, reducing the impact of the circuit on the entire power grid.

2.AC contactors are used in electricity, and when the current is relatively large, it can also be allowed to pass through, so it actually has an overcurrent or protection function.

3.When thunder, if there is lightning in the wire, it can automatically cut off the power supply, so as to protect the electrical appliances in the home from damage, and the most direct manifestation is that there will be a problem of tripping.

The function of the AC contactor is to turn on or off the power supply, and can replace the automatic switching function that manual switching is not capable of. It is widely used in automatic control, because most of them are used to control AC electrical appliances, so it is more convenient for the contactor itself to share AC power with electrical appliances as a power supply.

AC contactor is the most widely used low-voltage control appliance in electric drive and automatic control systems. As an actuator, it is used to turn on and break lines, or frequently control the operation of equipment such as motors. It is composed of dynamic and static main contacts, arc extinguishing covers, dynamic and static iron cores, auxiliary contacts and bracket shells.

After the electromagnetic coil is energized, the moving iron core is engaged under the action of electromagnetic force, and the moving contact is in contact with the static contact directly or through the lever transmission, and the circuit is connected. After the solenoid coil is de-energized, the moving iron core automatically returns under the action of the return spring, commonly known as release, the contact is separated, and the circuit is broken.

Hello, the above questions will be answered by me. The role of AC contactor:1

The role of an AC contactor is to protect the circuit and can allow large currents to pass through. 2.In power transmission systems, it is used as a control appliance with frequent or load breaks.

2. Working principle When the coil is energized, the static iron core generates electromagnetic attraction and attracts the moving core. Due to the linkage between the contact system and the moving iron, the moving iron core drives the three moving contacts to act at the same time, the main contact is closed, the auxiliary normally closed contact mechanically connected with the main contact is disconnected, and the auxiliary normally open contact is closed, so that the power supply is connected. When the coil is de-energized, the suction disappears, and the linkage part of the moving iron core is separated by the reaction force of the spring, so that the main contact is disconnected, and the auxiliary normally closed contact mechanically connected with the main contact is closed, and the auxiliary normally open contact is disconnected, thereby cutting off the power supply.

Hope it helps!

What is the function of an AC contactor? I believe that most of you don't know what to do when you encounter this problem, and some people have not even heard of the term "AC contactor". After all, most people have not been exposed to related fields, so they are naturally not interested in knowing, but AC contactors are indeed closely related to household electricity.

The following will tell you about the role of AC contactor and its working principle.

In general, the role of an AC contactor is to protect the circuit and allow a large amount of current to pass through. The relay of the AC contactor has the function of overcurrent or grounding protection, when there is lightning on the line after thunder, it will cut off the load power supply to protect the circuit. We often encounter tripping situations during thunderstorms, and it is because of this reason.

AC contactors are fully automatic control appliances. The main control object of AC contactor is the motor, and the slip elimination is also widely used to control other electrical loads, such as electric welding machines, capacitors, electric heaters, bridge lighting groups, etc.

AC contactors can be divided into electromagnetic and vacuum, and the working principles of these two types of contactors are mainly introduced here.

The structure and working principle of electromagnetic AC contactor

Electromagnetic AC contactor is mainly composed of electromagnetic system, arc extinguishing system, contact system and other parts, if you want to understand its working principle, you must start from these three structures.

Electromagnetic system: The electromagnetic system is composed of an electromagnetic coil and an iron core, which can drive the closing and disconnection of contacts.

Contact system: The contact includes the main contact and the auxiliary contact, which is the executive part of the contactor. The main function of the main contact is to turn on and break the main circuit to control some large currents, while the auxiliary contact is used to meet the requirements of various control methods.

Arc extinguishing system: The arc extinguishing system is used to ensure that the arc generated when the contact is disconnected from the circuit is safely extinguished to avoid damage to the contact by the arc.

Vacuum AC contactor working principle

The arc extinguishing medium of the vacuum contactor is the vacuum, not any specific substance, and its main contact is in the special vacuum interrupter. When the operating coil is connected to the power supply, the armature is engaged, and the contact is closed under the action of the contact spring and the self-closing force of the Zhenmin Shen air tube; When the operating coil is disconnected from the power supply, the reaction spring overcomes the self-closing force of the vacuum tube to cause the armature to fall and the contact to be disconnected.

Presumably, after reading the above content, you should also know what the function of the AC contactor is and how it works! Although this knowledge is relatively boring, it is not useless, and I hope the above content can help friends in need.

Simple and fast power supply to the device or quick disconnection of the power supply. This is especially true for three-phase power supplies or high-voltage power supplies.