to slect the buck and boost transformer it get little tricky here.
you have to know the amp or hp of the load it willbe running and you can buck it down a bit but here is the catch the buck it will have a 16 or 24 or 32 volts drop [ some have more slection ]
for 240 volt appaction genrally only need one B/B transformer will be needed but one quick head up double check with the NEC code related with B/B set up
http://www.bulletproof.com/jdesignerpro/transformercalculator.html this is from Sqd website related with the BB set up caluation to get the correct size
Merci, Marc
