I have to confess that I don't know much of anything about what comes from the POCO. I have a potential customer who has had 3PH machines burn up. The POCO came and metered 265 volts where there should have been 240 volts. They told him that an open delta can vary by 10%. Their suggested solution for him is to bring in another type of transformer if someone will do the load calculations. Meanwhile he has a lot of buck/boost transformers on the machines to bring the voltage to 240.

Help!

Dave