2 ms·
How big is the transformer and how many residences are sharing it? It’s probably stencil painted on the enclosure. I’ve seen half a dozen houses on a single 7.
by quickthrowman 29d ago
How big is the transformer and how many residences are sharing it? It’s probably stencil painted on the enclosure.
I’ve seen half a dozen houses on a single 7.2kV -> 240V 25kva transformer which can lead to problems given the available current on the secondary side is only 104A. As the transformer overheats you get voltage drop, as you’ve noticed ;)
Your supply voltage should be +/- 5% of nominal, 115-125V line to neutral and 230-250V line to line, appliances are generally OK with +/- 10% from nominal voltage.
- Jgrubb 29d agoI don't know "how big", but I do know that it's a 7.2kV line, and that there are 6 houses on it, and that mine is pretty far away while the other houses are quite close to the transformer. Like I said, it routinely drops to or below 100v. It's most noticeable after an outage is restored when everyone's hot water heaters and fridges kick back on at once.