A double circuit transmission line supplies a load of 10 MW at a power factor of 0.8 lagging and 30 kV. The resistance and reactance of line A are 5.5 ohms and 13.5 ohms, respectively; those of line B are 6 ohms and 11 ohms, respectively. What is the apparent power supplied by each line?
a. 5,790 & 6,730 kVA
b. 8,325 & 4,175 kVA
c. 6,020 & 7,600 kVA
d. 4,630 & 5,390 kVA
A 60 Hz, three-phase transmission line delivers 20 MVA to a load at 66 kV and 80% power factor lagging. The total series impedance of each line is 15 + j75 ohms. If a nominal "pi" circuit is used, what would be the transmission efficiency if the admittance is j6 x 10^-4 mhos?
a. 90.8%
b. 91.7%
c. 93.5%
d. 92.6%