220kV断路器分闸不成功原因分析及防范措施

查明220 kV线路转检修操作过程中2055断路器分闸不成功原因并提出防范措施。通过对该故障断路器进行检查、测试及分析,指出该断路器发生机械故障,机构内分闸线圈固定螺钉松动,撞针与触发器间隙变大导致撞针无法顶触发器,是断路器分闸不成功的主要原因。提出防止断路器发生此类机械故障的预防措施,为同类设备的运行维护提供参考。

Reason Analysis and Countermeasure of Opening Failure of 220 kV Circuit Breaker

The reason of opening failure of 2055 circuit breaker during the operation of 220 kV line from operation status to maintenance status is found and countermeasures are proposed. By the inspection,test and analysis of the breaker,it is pointed out that the mechanical fault happened in the breaker,the loose of the set screw of the opening coil in the mechanism,and the big gap between the striker and trigger which causes the striker cannot hit the trigger are main reasons of opening failure of the breaker. Countermeasures to prevent such mechanical fault happened in breaker are proposed which can provide reference to the operation and maintenance of similar devices.