Test was made at site to investigate several accidents of fuse broken in 400 V operating power supply terminal box occurred during operation of 500 kV disconnector.

• 介绍了针对上河变电站几次 5 0 0 k V隔离开关操作引起的 40 0 V操作电源端子箱内熔丝熔断事件进行的现场试验。