I have a situation where I need to power a intermittent single phase large load with a three phase transformer so I will not be using one leg. Its short term hook up for two to three years at best so I do not want to buy a transformer ($$$$$) when I have a 3 phase dry transformer collecting dust of sufficent size. I have not come up on this type of config before so I have my conserns. Such as
*Would it be kosher to wire and tap only two of the three coils?
*if not, what issues would I have if I were to wire the high side 3 phase and only use two legs where the amperage in theory be upto 100 amps, 90 more realistically and only intermittenly?
