I'm a digital guy whose forgotten his "big wire" electrical education. I'm surprisingly unable to find a solid reference for this.
I have a (European) 220V 50Hz split phase source (110V + 110V + GND). I have a UPS which only accepts single phase input (220V + N + GND).
How do I go about finding and how do I wire up an isolation transformer to use my UPS?
Update: This is a ship, not residential/commercial EU power. It is indeed split phase. I've also verified (by plugging it in and measuring output) that the UPS does not work and does need a ground potential neutral.