Air Switch Function How Air Switch Works

Air switch is also called air circuit breaker. As long as the current in the circuit exceeds the constant current, the air switch will automatically open the switch. The function of the air switch is to protect the circuit from being burned due to excessive current. Because air is used as an arc extinguishing medium, it is called an air switch. The air switch is different from the normal switch. It has the function of automatically cutting off the circuit and can effectively avoid the occurrence of a safety accident. Isn't it amazing that you can cut off the air switch yourself? Today we will debunk the mystery and see how the air switch works and how it works!

Air switch introduction

The air switch, also known as an air circuit breaker, can automatically cut off the circuit for reliable protection in the event of an overload, voltage drop, or disappearance or short circuit within the circuit. The air switch is currently widely used in the 500v transmission and installation. It is used to connect, load, and break fault currents such as rated operating current and short circuit in the circuit.

How the air switch works

The basic principle of the air switch work is that the short circuit current is much larger than the normal load current, the short circuit current causes the release to trip, and the movable contact is separated from the static contact by the spring, so that the circuit is disconnected. As for short-circuit power. How the flow trips the trip unit, generally in the following three ways.

1. Principle of thermal motion

The so-called thermal dynamic principle is that when the line is subjected to a general overload, the overload current can cause the heat element to generate heat, and the heat will deform the bimetal to cause the release to trip, thereby breaking the circuit.

2. Electromagnetic principle

The so-called electromagnetic principle is that when the load current is passed through the coil, the attraction force of the electromagnet is small. When the short-circuit current is passed, the suction force is enough to cause the armature to move, and the trip unit is triggered to trip.

3. Duplicate tripping principle

In general, a bimetal is used. When the circuit is overloaded for a certain period of time, the heat will deform the bimetal and cause the trip unit to trip, thereby breaking the circuit.

  

The composition of the air switch

The air switch is mainly composed of the following components: undervoltage release, release release, alarm contact, auxiliary contact, rotary operating handle, electric operating mechanism, extension handle, handle locking device.

Air switch purchase

Care must be taken when choosing an air switch, as it relates to safety issues. Buy air switch first look at the brand, good brand quality has a certain degree of protection; then look at the size of the air switch's rated power, does not meet the production specifications can not be bought; air switch purchase can not be cheap, cheap general No good goods.

  

The role of air switch

The main function of the air switch is: Under normal conditions, the overcurrent release is in the release state; when a serious overload or short circuit fault occurs, the coil in series with the main circuit will generate electromagnetic force to attract Xi'an iron. The top unlocking hook is the main contact opening. The air switch avoids the occurrence of safety accidents and effectively protects the people's personal safety.

Editor's summary: The above is the role of the air switch, the working principle of the air switch. Through the above introduction, I believe that everyone has a general understanding of the role and working principle of the air switch. When buying an air switch, Buy your own actual situation. For more information, please continue to follow our website.

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