craff
Member
- Location
- Southern California
We have a 240V 3P3W service in a older building. There is a transformer (ACME, 480V3PH prim, 240V3PH sec.). It's backwired to provide 480V3W to a 100HP compressor for HVAC. The compressor went bad and the local utility says we need remove the transformer and replace compressor with a 240V3W unit Are they worried about power spikes or the proximity to the substation???????????????