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

Exercise 6

In a balanced three-phase system, the source has an abc- phase sequence and is connected in delta. There are two parallel wye-connected loads. The phase impedance of load 1 and load 2 is 4 + j 4 and 10 + j 4 , respectively. The line impedance connecting the source to the loads is 0.3 + j 0.2 . If the current in the a phase of load 1 is I AN = 10 20° A rms, find the delta currents in the source.