"Karl Townsend" wrote in message
...
Sounds like PM is pretty sure you can change your Fadal. That's the
better way to go.

You can also use a three phase transformer to step up to 480. I do it
for my plasma cutter. I had to play with the taps the get the voltages
right.


I step up here also, with a 30kva dry type delta/delta and also with an old
400amp welding transformer that Iv'e reconfigured to operate as a wye
autotransformer..

But depending on exact winding configuration and conection, issues can arise
with isolation, detection of load-side ground fault detection at the supply
side, loss of one phase, so forth and so on...

As such, it's probably the topic for a different discussion.