Thanks all for the info.
Looks like we are going with Electrical Maintenance Consultants (EMC) out of Rocklin, CA. They've done a lot of work with the other small municipal utilities in the area.
I've added all the other companies info to a list we have going around here.
Thanks again
It is oily. We were told thats not an issue for this insulation. The quote is just for pulling the rotor and a general cleaning of the machine. All competitive quotes, since we are a municipality, were between 60,000 to 80,000. Which include insulation repair. I dont think Brush will back on...
The 'H' here was very frustrated that he could not get 'H' there to see what we were seeing here. He was taking it as a failure on his part to show them what we saw here. We sent them about 2 dozen boroscope pictures showing patches of white on the windings. They still said we didnt have a...
"H" happened to be near by (Southern CA). I trusted him, he was hamstringed by his agreement with Brush. I guess the insulation engineer in England did not see the issues he did. We asked him if he'd come back independently, but he would not. He didnt want to ruin his working arrangement with...
The rep from Brush was actually a sub-contractor out of Canada and he has been doing this for Brush for about 15 years. I think he thinks there is an issue, but he isn't allowed to say anything to us directly. The Brush report for our generator says there is no problem, we just need to pull...
I think 'shielding' was just an example used to explain some of the layers in the insulation to me.
Some of the spots look like, from what I understand, classic corona. White to a little yellow, starting at a point and a 'V' pattern away.
Other spots just look like a patch of white, almost...
It's 12kv and it's about 5 or 6 inches from slot. The rep from brush said it's at the edge of the shielding/semiconductor. Official Brush report said nothing.
the problem is there is corona, or atleast white marks, between several windings in a row. from what I understand it should be between phases not between 4 or 5 windings in a row. We are more concerned about that, and brush says its nothing.
Hello all
I've got white marks on the end turns on one of our generators. I think it may be corona. It is a Brush BDAX 7-290ERJT, 71176 KVA. We have been going through Brush for the last week, had a rep from them out for the last couple days and no answers. I think the white marks are an...
