交流电源串入直流电源回路导致断路器跳合闸原因分析

Cause analysis of circuit breaker tripping caused by AC power flowing into DC circuit

介绍2起多台断路器同时跳闸或合闸的典型事故,通过现场试验验证和分析,证明当交流电源串入直流电源回路中,可能引起多台断路器跳闸或合闸,并提出防范措施。

Two typical circuit breaker tripping faults were introduced in this paper. By field test and analysis, it is proved that circuit breakers may trip when AC power flows into DC circuit. Precaution measurements were suggested in this paper.