The Vertical Fuse Disconnector Is Not Closed Properly Or The Three Phases Are Out Of Phase.

vertical fuse switch disconnector is not closed properly, mostly due to mechanism corrosion, jamming and maintenance and debugging not being adjusted properly. In this case, you can pull nhrt40 vertical fuse switch disconnector and close it again. For 220kV vertical fuse disconnector, you can push it in with an insulating rod.
If necessary, apply for power outage.