Maintenance And Repair Issues Of Sf6 Circuit Breaker Operating Mechanism

In order to keep sf6 circuit breaker operating mechanism in good working condition, maintenance and management must be strengthened.

1. Keeping the air moist or unclean, and the pipeline unclean, may cause the following consequences:

(1) The moist gas decomposes into a mixture of hydrogen, oxygen and other gases under the action of the arc, destroying the insulation between the fractures after the main contact is 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 residue in the pipeline may block the air port, causing sf6 circuit breaker spring mechanism to malfunction and jamming.

(4) 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. In severe cases, it may cause the nonlinear resistor porcelain bottle to burst.

Therefore, an oil-water separator is installed on the air inlet pipe of the air storage cylinder of the main circuit breaker, and a drain valve is installed at the bottom. During use and maintenance, water should be drained regularly to keep the air path clean.

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