I have a couple of buck-boost transformers that I think are grossly undersized, and I'm hoping someone can check my math:

Two 3kVA, 600V, delta-connected auto-transformers should have a line current of 5 amps, correct?

3000VA * 2 * 0.87 (because it's an open delta) / 1.73 / 600V primary = 5.0A

Thanks a bunch.

-John