A group of a small appliances on a 60Hz system requires 20kVA at 0.85 pf lagging when operated at 125 V(rms). The impedance of the feeder supplying the appliances is 0.01 + j0.080. The voltage at the load end of the feeder is 125 V(rms). a) What is the rms magnitude of the voltage at the source end of the feeder? b) What is the average power loss in the feeder? c) What is the capacitor ( in microfarads) across the load end of the feeder is needed to improve the load power factor to unity?

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.3P: The instantaneous voltage across a circuit element is v(t)=400sin(t+30)volts, and the instantaneous...
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A group of a small appliances on a 60Hz system requires 20kVA at 0.85 pf lagging when
operated at 125 V(rms). The impedance of the feeder supplying the appliances is 0.01 + j0.080.
The voltage at the load end of the feeder is 125 V(rms).
a) What is the rms magnitude of the voltage at the source end of the feeder?
b) What is the average power loss in the feeder?
c) What is the capacitor ( in microfarads) across the load end of the feeder is needed to improve
the load power factor to unity?
Transcribed Image Text:A group of a small appliances on a 60Hz system requires 20kVA at 0.85 pf lagging when operated at 125 V(rms). The impedance of the feeder supplying the appliances is 0.01 + j0.080. The voltage at the load end of the feeder is 125 V(rms). a) What is the rms magnitude of the voltage at the source end of the feeder? b) What is the average power loss in the feeder? c) What is the capacitor ( in microfarads) across the load end of the feeder is needed to improve the load power factor to unity?
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