I just finished troubleshooting a Sorgel 3 phase general purpose transformer from square D. Primary 480v secondary 208y/120v. Transformer x2 has 0 volts to ground. X1, x3 roughly 200v to ground(too high). H1,h2,h3 277 on the money to ground. 480v phase to phase. I shut down power checked terminations, bonding etc. Onsite maintenance says it's about 12 year old unit. It's indoors, temp controlled room. Does this sound normal? Any suggestions? Thanks.