At the job site, we have a 240V high leg delta transformer that feeds numerous buildings. We added some three phase roof top units and they are not functioning properly. We measured the L-L voltage at the panel and it had:
A-B: 254V
B-C: 242V
A-C: 243V
We told the utility about the problem and they don't seem willing to help the client out saying their voltage is "within spec". One option I was thinking of was installing a single phase transformer between A-B to reduce the voltage. Someone else mentioned using a UPS ($$$$$$$) which Im not even sure that would work. Should I just push back and say to replace with single phase roof top units? Anyone else have a better solution?
A-B: 254V
B-C: 242V
A-C: 243V
We told the utility about the problem and they don't seem willing to help the client out saying their voltage is "within spec". One option I was thinking of was installing a single phase transformer between A-B to reduce the voltage. Someone else mentioned using a UPS ($$$$$$$) which Im not even sure that would work. Should I just push back and say to replace with single phase roof top units? Anyone else have a better solution?