ECN Forum Forums General Topics of the Trade General Discussion Area What would've caused my power to do this?

We used to have brownouts a lot before the poco upgraded their system. The lowest voltage I got at a receptacle was 42 volts. Across the street would have full power, and other parts of the subdivision would have none. It's been a while but I do remember a lineman telling me it was something to do with a 3 phase distribution transformer. Can't remember what was the exact cause.