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

Exercise 47

In a balanced three-phase system, the source has an abc -phase sequence and is connected in delta. There are two loads connected in parallel. The line connecting the source to the loads has an impedance of 0.2 + j 0.1 . Load 1 is connected in wye, and the phase impedance is 4 + j 2 . Load 2 is connected in delta, and the phase impedance is 12 + j 9 . The current I AB in the delta load is 16 45° A rms. Find the phase voltage of the source.