E11.14 If the line voltage at the load is 480 V rms in Fig. E11.14, find the line voltage and power factor at the source.
Answer: VL = 501.7 V rms, pf = 0.9568 lagging
Balanced three-phase source
a 0.1 ̥̐ j0.2 ̥̐ A + 480 V rms -
b 0.1 ̥̐ j0.2 ̥̐ B
c 0.1 ̥̐ j0.2 ̥̐ C
40 kW 0.8 lagging
30 kVA 0.9 leading