When running normally , a high - voltage explosion fuse is in series with the electrical circuit , the fuse wire is strained and the active joint is locked 跌落式高压熔断器又称喷射式熔断器，正常运行时串联在电力线路中，熔丝处于拉紧状态，活动关节被锁紧。
2.
When circuitry malfunction happens , the current is so strong that the fuse wire melts and breaks , and the active joint is released , as a result , the fuse tube falls and the electrical circuit is shut off 当线路发生故障时，故障电流使熔丝熔断，活动关节被释放，熔管迅速跌落，将电路切断。
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