Chapter 10: Problem 31
A group of small appliances on a \(60 \mathrm{Hz}\) system requires \(25 \mathrm{kVA}\) at 0.96 pf lagging when operated a \(125 \mathrm{V}(\mathrm{rms}) .\) The impedance of the feeder supplying the appliances is \(0.006+j 0.048 \Omega\). The voltage at the load end of the feeder is \(125 \mathrm{V}(\mathrm{rms})\). 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 size capacitor (in microfarads) at the load end of the feeder is needed to improve the load power factor to unity? d) After the capacitor is installed, what is the rms magnitude of the voltage at the source end of the feeder if the load voltage is maintained at \(125 \mathrm{V}(\mathrm{rms}) ?\) e) What is the average power loss in the feeder for \((\mathrm{d}) ?\)
Short Answer
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Key Concepts
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