一起销轴缺陷引起断路器合闸不到位故障分析

Analysis of a Circuit Breaker Inadequate Closing Failure Due to Pin Defect

介绍了一起断路器合闸不到位故障,通过现场检查、尺寸测量、故障模拟、金属检测,明确故障原因为提升杆与绝缘拉杆连接销轴端部的弹性锁片未安装或安装工艺不良,最终导致销轴产生移位并与下支撑座内壁产生摩擦,使得合闸阻力增大,导致断路器合闸不到位。并根据故障具体原因,提出了相应的排查措施。

A circuit breaker poor closing failureis analyzed.Through field inspection,size measurement,fault simulation and metal detection,it is found that the absence or poor installation of the locking piece at the end of the joint pin of hoisting rod and insulation rod causespin displacement and friction with the inner wall of the lower support,which increases the closing resistance and hence results in the inadequate closing failure of the circuit breaker.Accordingly,corresponding countermeasures are put forward.