I put in a 75kva zig zag today. 480X208Y.

Anyway, I remembered to take readings before and after....

75kva that I took out, Dry transformer..general purpose, yada,yada...

With no load, primary current was 7.5-8 amps/phase...

New transformer...1 amp/phase, no load....

The old transformer had 6.5kw of core losses and magentizing currents?


Dnk......