We have a customer that put in a 120/208 3 phase generator and a transformer 120/208 to 120/240 to match our voltage.He is getting funny voltages from the secondary side of the transformer p-p 240 p-n 150s.He has wired the 208 side of the t-former with the neutral connected to the windings.Isnt there a phase shift from 208-240?So the neutral on the 208 side should be frame ground?Do the make an isolation transformer 120/208 - 120/240?Any thoughts?