How To Perform Routine Maintenance On Vacuum Circuit Breakers？

​In order to keep the vacuum circuit breaker in good working condition, regular maintenance management must be done.

1. Keep the gas path clean: humid or unclean air and unclean pipelines may cause adverse consequences

(1) Humid gas decomposes into mixed gases such as hydrogen and oxygen under the action of the arc, destroying the insulation between the breaks after the main contacts are disconnected, making it difficult to ignite the arc or the arc reignites. In severe cases, it may cause the arc extinguishing chamber to burst.

(2) The insulation strength of the supporting porcelain bottle and the inner cavity of the arc extinguishing chamber is reduced, causing surface discharge.

(3) Foreign matter such as paint and rust in the pipeline may block the gas port, causing the main circuit breaker to malfunction and jam. In addition, if foreign matter enters the arc extinguishing chamber, it may cause poor contact of the main contact, causing the nonlinear resistor to burn due to long-term power-on, and in severe cases, it may cause the nonlinear resistor porcelain bottle to burst.

2. Regularly replace rubber parts

The main circuit breaker is a pneumatic electrical device with a complex structure. Each component has high requirements for sealing performance. To ensure good sealing performance, rubber parts should be replaced regularly.

3. Regularly check the main components

The arc extinguishing chamber, nonlinear resistor, main valve, transmission air cylinder and other main components should be checked regularly to maintain good technical status.