What are the common failures of low voltage circuit breakers? How to avoid?

Low-voltage circuit breakers in operation and use often appear a series of faults:

Failure 1: opening and closing performance accidents. The opening and closing tasks are the toughest test of the circuit breaker. The main reason for the vast majority of opening and closing accidents is due to obvious mechanical defects in the circuit breaker, followed by lack of oil or oil quality does not meet the requirements. There are also due to the circuit breaker current breaking capacity is insufficient.

Fault two: poor electrical conductivity accident. Field accident statistics show that poor conductivity failure is mainly caused by mechanical defects.

Fault three: external insulation accident. External insulation accidents are mainly due to dirt flash and lightning caused by circuit breaker flashover, explosion. Dirt flash is mainly due to porcelain vase leakage distance school small, not suitable for use in dirty areas; followed by circuit breaker oil seepage, oil leakage, so that its porcelain skirt is easy to accumulate dirt and cause flashover.