Basic Engineering Circuit Analysis 11th Edition by David Irwin ,Robert Nelms

تمرين 25

A three-phase balanced system has a load consisting of a delta in parallel with a wye. The impedance per phase for the delta is 12 + j 9 and for the wye is 6 + j 3 . The source is a balanced wye with a positive phase sequence. If V an =120 30° V, determine the line currents.