500 kV tank circuit breaker has good anti-seismic performance

with an external line package type TA

compact configuration

small area and high reliability.However

in recent years

internal discharge faults of tank circuit breaker in Hebei Electric Power Corporation occurred frequently when 500 kV tank circuit breaker was being combined into grid.Through studying on fault phenomenon and experience from the laboratory

it is detected that internal discharge of tank circuit breaker is caused by impurities

so it is important to keep assembling condition clean and avoid the dropping of scraps during operation.At present

thoroughly cleaning up impurities at the bottom of tank circuit breaker is taken to keep inside cleaning.