A 300-kilovolt-ampere transformer bank consisting of three 100-kilovolt-ampere transformers has a 3-phase, 480-volt delta primary and a 120/240-volt, 3-phase, 4-wire delta-connected secondary. For...

A 300-kilovolt-ampere transformer bank consisting of three 100-kilovolt-ampere
transformers has a 3-phase, 480-volt delta primary and a 120/240-volt, 3-phase, 4-wire
delta-connected secondary.
For problems 1 through 4 show calculations and/or source of information.
1. What is the full-load current in the primary?