ECN Forum Forums General Topics of the Trade General Discussion Area 75kva transformer

A 75kVA transformer is designed to change voltages, but the total power involved is the same on both sides (ignoring losses).

On the primary side; 75,000VA/(480V)(1.73)=90.2Amps
On the secondary side: 75,000VA/(208)(1.73)=208.3Amps