If we draw phasor Ez/v3 48 degrees behind phasor E,IV3, we can scale off the length of the vector(E1FM3)-(E2/V 3). It is found to be 141 V which is very close to the measured voltage drop E3 in the line.
The reactive power received by the line(per phase) is(93 57) 150 var. The real power consumed by the line due to its resistance is(200 170) 30 W 153 VA The apparent power absorbed by the line 150 Since the voltage drop across one line is 164 V, the current in the line must be 153 1.08 A E3 141 We could, of course, have measured this current directly, but a measurement of the real and reactive power and a knowledge of the voltages is sufficient to enable us to