Chapter 24, Problem 10P

For the Y-Y system of Fig. 24.46 the impedance of each line is $2+j20$ ohms and the line-to-line voltage at the source is 14.7kV $\angle {\text{O}}^{\text{o}}$. The balanced load draws a total power of 750 kW at a current of 80 ampere with a lagging power factor.

a. Find the total load loss of the system including the line loss.

b. Find the phase voltage of the supply.

c. Find the power factor of the load (including the line loss) on the supply.

d. Is the power factor leading or lagging?

e. Find the magnitude and phase angle of each phase of the balanced load.

f. Find the power factor of the load (not including the line loss).