So i,ve got three older machines all 575 and only 120/240 in the shop my question is can i feed a step down transformer backwards to give me the voltage i need. For testing purposes could i feed x1 and x2 from the panel and get 600 across h1 h2 h3 and have it run the motors. Also if this would work would the neutral on the secondary have to be used. The shop has 100amps i,ve got a 7.5kva transformer and the largest motor only draws 5.5 amps so i think i,m covered that way. Any ideas would be abbreciated. Thanks Jim
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240 1phase to 575 3phase