What is an arc extinguishing chamber?

High-voltage arc extinguishing device

The vacuum arc extinguishing chamber is a core arc extinguishing device used in high-voltage electrical equipment. It creates a vacuum environment to quickly extinguish the arc and ensure the safe operation of the equipment. The following is a collection of key information:

Core function

When the circuit is disconnected, it quickly evacuates the vacuum to form a high insulation environment, so that the arc is extinguished in a short time to prevent equipment damage and accidents.

Main application scenarios

It is widely used in power transmission and distribution systems, metallurgy, mining, chemical industry, industrial high-frequency heating and other fields, especially suitable for large current and high-voltage circuit breaking needs.

Structural composition

Airtight insulation system: including glass or ceramic shell, moving/fixed end cover and bellows to ensure the sealing of the vacuum environment. - Conductive system: It is composed of contacts, conductive circuits, etc. to realize current switching. - Shielding system: Some designs include metal shielding tubes to enhance electromagnetic compatibility.

Classification and materials

Classification: glass vacuum arc extinguishing chamber and ceramic vacuum arc extinguishing chamber (ceramic is more widely used). - Contact material: Common copper-tungsten alloy, copper-bismuth alloy, etc. Copper-chromium alloy is widely used due to its superior performance.