higher power
Member
- Location
- plainview, tx. usa
I have a 480v delta to 120/208 dry transformer 225kva . Power to the building is 277y (480 between phases). This has not changed since the original installation. The building was stripped of copper and now we are rewiring for a remodel. This transformer was in the building and was used to provide 208/120 power. the 277/480 was used for a/c and lighting. I can't see how the 277y was fed to this transformer to get 208/120 out since it was made to be 480 delta input. Is this possible, if not, then I'm wondering if the power company might have changed from 480 delta to 277y coming into the building, but I have seen the transformer label on the inside and it clearly shows 277y. Nothing appears to have been changed. The original building plans show this transformer was coming off of a main breaker and fed with 350mcm.