I'm a trouble man for a utility company. We have a 14.4 phase to ground 26 phase to phase line. The problem is a 277/480 bank. Under normal source conditions there is no problem. When we switch the line out to another substation our phase to ground voltage is good but the phase to phase goes haywire. 515 480 444. ?? It's a bank of 3 250 kva transformers on a rack. The further I get from the station the worse the voltage gets. I have a 3 phase pad mount another mile down the road and the voltage is even worse. I know there's at least 3000 Kvar of capacitance on the distribution circuit. The customers equipment trips off line immediately when we switch to the other substation. There alarm is an current imbalance of 30% or greater for 1 second. Any help would greatly be appreciated. Thanx
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Since the later 1980s, manufacturing companies have seen over 3 percent in labor output year on year, with most of this productivty enhancement occuring because of the optimization of repetitive tasks. Download Now