5 S electric
Member
I work for a college. We are currently having some ups's going off randomly through out the day. The problem is that it is only happening on the 3rd floor of this building. It has 2 transformers on the third floor 480 to 120/208 4 panels 120/208. 2 panels on each transformer. One transformer is a 75 kva and the other is 112.5 kva. Randomly the UPS's start going off. Sometimes last for 1 min or 40 min. We replaced both of these transformers about 3 years ago and it cleared up the problem. Recently the problem is back. We replaced the 112.5 kva transformer and it cleared the problem for about 3 weeks and now it is back. Traced the circuits and the problem is coming from both transformers. Wondering if i should try to replace the 75 kva transformer next? It doesn't happen to all ups's just certain ones. Wonder if it is the tolerance rating on each ups. There is a computer cluster there with identical ups's that where being affected. We changed the settings to poor power quality and theses ups's haven't had a problem. I have been monitoring the power with an Amprobe DMIII. Problem is i don't know what i am looking for. Do any of you guys have experience reading Amprobe software? Also this building is tied to the same high volt that feeds another building we were having amperage going to ground. Check out this forum. http://forums.mikeholt.com/showthread.php?t=162996&page=8
They keep asking for answers and i don't know what to tell them. Called a couple of company's to look at it and they said it would be 7,000 to hook there meters up for a week. That isn't even solving my problem just them collecting data. I can email all of the data i collected if some one can make sense of it. I can admit that the cooling went out in there and it exceeded 105 degrees. i also have the option to transfer the high volt to another circuit. We have 3 separate feeds that come on to campus. What is strange is that only the 3rd floor has this problem. All help would be appreciated.
They keep asking for answers and i don't know what to tell them. Called a couple of company's to look at it and they said it would be 7,000 to hook there meters up for a week. That isn't even solving my problem just them collecting data. I can email all of the data i collected if some one can make sense of it. I can admit that the cooling went out in there and it exceeded 105 degrees. i also have the option to transfer the high volt to another circuit. We have 3 separate feeds that come on to campus. What is strange is that only the 3rd floor has this problem. All help would be appreciated.