分相断路器防跳失败原因分析

Analysis on trip-proof failure cause of the phase separation circuit breaker

针对某型分相断路器防跳试验失败的现象进行分析,得出该型断路器防跳失败的根本原因是断路器机构三相不一致保护动作后不切断合闸回路,导致非跳闸相在跳开后经合闸回路中保持的"+"电作用而合闸,后又经三相不一致保护跳闸,周而复始,导致断路器发生跳跃。

The trip-proof malfunction about one kind of split-phase circuit breaker has been analyzed in this paper. The underlying reason for the failure was that the circuit breaker＇ s three-phase discrepancy induced the failure to cut off the closing circuit ＂after protective action. Afterwards the positive electricity in the closing circuit caused the non-trip-phase closing after tripping. Then the three-phase discrepancy resulted in the protective tripping. Periodically, leading to the circuit breaker＇s tripping.