Circuit breaker Maintenance

In order to make the main circuit breaker is in good working condition, maintenance and management must be strengthened.

1. Keep the air moist or dirty, do not clean electri calmete‍ the pipeline, are likely to cause the consequences:

(1) wet gas under the arc decomposed into a gas mixture of hydrogen and oxygen, destroy the main contact points between the insulation fractured fracture is difficult or arc reignition, can cause severe interrupter burst.

Breaker

(2) support insulator and arc interior cavity insulation strength decreases, resulting in surface discharge.

(3) in the pipeline patent leather, rust residue and other foreign objects that may block air intakes, the main circuit breaker operation failure occurs niche phenomenon.

(4) If the foreign body into the arc chamber, the main contact may cause a bad connection, due to long-term power nonlinear resistance and burning, can cause severe nonlinear resistance porcelain burst.

Therefore, in the intake manifold of the main circuit breaker equipped with air storage tank water separator, the lower part of the release valve, should be used to maintain current transformer‍ regular road drainage to maintain clean air.

2. Regular replacement of rubber parts

Main circuit breaker is a complex structure of pneumatic electrical, sealing performance of the components are higher, in order to ensure good sealing performance, rubber parts should be changed regularly.

3. Regularly check the main components

Main components should be checked regularly to maintain good technical condition.

(1) interrupter

Main contact on a regular basis to detect and moving contacts overtravel spring recovery state, dynamic and static contact due to open, close frequently due to friction and wear, resulting in over-travel is reduced, the contact pressure is reduced. When overtravel is reduced to a certain extent, to replace the dynamic and static contact. Moving contact spring deformation recovery exceeds a certain limit, must be replaced.

(2) non-linear resistance

Maintain internal nonlinear resistance porcelain clean, circuit breakers‍ sealed, regular replacement of non-linear resistance porcelain desiccant. Varistor detect the resistance exceeds a certain limit, the resistance changes must be replaced.

(3) the main valve

Periodically check with the size of the piston and the valve between the size does not meet the requirements should be replaced.

Appropriately adjusting the drive air cylinder buffer, to ensure good isolation switch operation. Periodically check the accuracy of the piston and the cylinder between tie by trimming or replacement parts to ensure its good operational performance. (4) Transmission air cylinder

(5) Ventilation cock

Must be replaced periodically door filler plug, plug detect CNC Electric‍ ventilation doors, be adjusted to within the allowable range.