We have a 3 phase 208Y120 feed and need to boost to power a single phase 240 unit. I personally have not seen the unit but the guys tell me it's a 'Big Screen' display (scoreboard). The question is: can we use a single BB xfmr and follow the basic 208-240 diagram which basically puts everything in series or do we need 3 BB xfmrs and simply use only 2 of the outputs? My concern is that the 208Y will feed the BB from 2 diff xfmrs. Will it cause a phase shift and cook my (single) BB xfmr?
