１故障发现电工班完成了１号专用配变当天的供电任务后，为了降低高压损耗，当即拉开高压侧跌落式熔断器。第二天早晨重新送电时，发现一控制回路保险丝烧断，经查是无声运行器中的３个二极管击穿短路，换新的二极管后再送电一切正常。但等天黑停电，次日再送电时，重复发生以 1 fault found that electrician completed the first day of the special distribution transformer power supply tasks, in order to reduce high voltage loss, immediately opened the high-pressure side of the drop-in fuse. The next morning to re-send electricity, found a control circuit fuse blown, the investigation is silent operation of the three diodes in the breakdown of short-circuit, for the new diode power transmission and then everything is normal. However, such blackouts, such as blackouts the next day, the recurrence occurs