瞬时故障时在最佳重合时刻分相重合，永久故障时闭锁重合闸。

Further more, the switches reclose at optimal reclosing time by phase for instantaneous fault and shut down reclosure for permanent fault.

youdao

对部分LW14, LW15型SF 6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。

For LW14 and LW15 SF6 circuit breaker, the reason of reclosing block after opening operation has been analyzed in the paper.

youdao