I have a cutomer who thinks his transformer is overheating. Of course he has no concept how hot transformers really are. He has even stated that lightly loaded transformers run hotter than fully loaded devices.
This is a 6 KVA three phase, T connected transformer. The primary is connected to a 3 phase 3 wire 480V primary and the secondary is connected for 208Y/120V 3 phase 4 wire.
The transformer output is wired to 3 individual single pole fuse holders. X1 is fused at 10 amps and has a single phase loading of 7 amps. X2 and X3 are presently unloaded (no fuses installed).
I know that we will have poor effciency and regulation, but other than these what is wrong with this application?
