At 208 volts, that would be a L-L connection into a 208Y/120 system. I'm wondering how you would be wiring that. Since neither primary connection is grounded, that rules out an autotransformer arrangement. How would the 480 volt secondary be grounded?
Perhaps an even more important question is how will the 208 volt step-down secondary at the far end be grounded? Grounded at one end? Center tapped? it certainly will not have the 120 degree phase angle relative to ground that 208 volts at the origin would have.
