Website service announcement
Update: The launch of our new online community IET EngX is taking a little longer than anticipated!
We want to make sure that everything is tidy in the new community so Engineering Communities will remain in read-only mode until w/c 6th December.
Read our latest blog post for more information.
A KCEG relay is protecting an 11kV/415V transformer, and the 110Vdc fuse has failed - possibly because due to a pilot bulb blowing. The VCB has remained closed. What concerns me is the possibility of a trip due to power-on checks when I replace the fuse. The transformer feeds an entire site, so we would need to alert everyone to a risk-of-trip. Any experience out there, please?
Its more worrying that the relay being out of service hasn't resulted in a trip … leaving the transformer without protection, possibly for an extended period of time.
For information of others, replacing the fuse didn't trip the cct!