Restricted Earthfault tripping
Restricted Earthfault tripping
(OP)
please can someone explain why the REF relay on meant to protect a 60MVA 132/33KV transformer will trip whenever a 33kv line feeding from the transformer trips on Earth fault.






RE: Restricted Earthfault tripping
RE: Restricted Earthfault tripping
RE: Restricted Earthfault tripping
RE: Restricted Earthfault tripping
RE: Restricted Earthfault tripping
RE: Restricted Earthfault tripping
Usually neutral CT, as ScottyUK said.
of course possible setting mistake.