crshears, thanks... that's exactly what I was wondering. So, you guys would turn all fans off before oil temps hit 40 C. Your comment about how they'd "skew the tap positions," on parallel transformers, that's really interesting. The kinda stuff that only comes from experience, I take it? (heck...
Appreciate the responses everyone. This is probably going to take a little more digging on my part :). DRWeig, the second one was a pretty interesting read--thanks for that.
The main issue is that when the oil temps fall below 40 C, there's the potential for static electrification, which can completely ruin a transformer.
I can see how this wouldn't be an issue for most of the world, but for areas where it gets really cold, there have to be some documented...
Lately we've had nights where ambient temp drops to around -7 F and -20 F.
I'm finding a lot of information on operating procedures for high temps but there doesn't seem to be much in the way of cold temps.
But it does get cold enough to bring oil temps below what they should be. For example, we have procedures in place to stop some of the cooling fans if oil temps fall below 43 C. If this happens AND if winding temperatures indicate < 67.5 C we then stop "automatic" operation of fans (as they...
Hi All,
I'm researching how various power plants operate their large power transformers in extremely cold weather. Particularly interested in transformers that are rated in the hundreds of MW and 1000 MW range.
With extremely cold weather, issues arise with oil temperatures becoming too low...
