For LW14 and LW15 SF6 circuit breaker,The reason of reclosing block after opening operation has been analyzed in the paper.The improvement plan is presented and it reaches better effects in practice.

• 对部分LW14,LW15型SF6断路器分闸操作后重合闸闭锁的原因进行了分析,提出了改造方案,并在实践中取得了良好效果。