Good morning everyone.
I'm looking for help in understanding a recent incident that happened locally. During regular maintenance, a couple of technicians were performing testing on a 13.8kV/230kV D-Y generator step up transformer. One of their tests was winding resistance measurements using a...
Good afternoon.
I have been asked to compile information for an arc-flash survey. One specific request is giving me some trouble. I need to find a trip curve for a 50A federal pioneer electric breaker, cat #NEF421050. This is on a 129vdc system. I am aware of the history of FPE breakers and...
Good morning.
I had a quick question regarding terminology. "Slip ring" is the term for the conductive rings mounted to the rotating assembly, correct? What is the proper term for the stationary ring to which the carbon brushes are attached? Someone mentioned "collector ring" but I think...
Good evening everyone.
I was hoping some of you may be able to help me with something. We have an excitation transformer that is in need of replacement. The existing transformer is a wye-delta 13.8kv to 630v. Somehow, the replacement was mistakenly ordered as a delta-wye. We have one group...
Hey everyone, I'm hoping someone here will be able to give me some input.
I'm trying to troubleshoot some issues we have been having with one of our units. The primary issue is that the governor system, Vevey Type 200, will intermittantly slam the gates closed while running online. It appears...
