The relays protect the primary contactors that feed 2500 kva transformers which feed double-end subs.ie Main tie Main systems. In one instance the relay tripped and while trying to investigate why the relay operated it began smoking. The relay was still energized but with no load. In another...
slavag
1. Switchgear room is climate controlled. Approx. 70F,
I wouldn't believe that inside the relay case there
would that great of a deviance in temp other than the
heat generated by the relay in its case.
2. The relay is on a latching 4160v contactor, which means
that...
I have had three Multilin 735 relays have violent failures with what seems to be the power supplies. I have talked to my local rep. and he says that there are no known problems. They all were installed in 2000 and I'm wondering if 7 to 8 years is the total life for this particular relay? I...
I would also make sure that the transformer is level. If for some reason the foundation hasn't moved to make the transformer lean. Also I would look at the history to see if any internal work has been done. I have found radiators that have had rags stuff in the openings during some internal...
