6. A 3-phase, star-connected alternator has a resistance of 0.52/phase and a synchronous reactance of 52/phase. It is excited to give 6600 V (line) on open circuit. Determine the terminal voltage and voltage regulation on full-load current of 130 A when the load p.f. is (a) 0.8 lagging (b) 0.6 leading.
6. A 3-phase, star-connected alternator has a resistance of 0.52/phase and a synchronous reactance of 52/phase. It is excited to give 6600 V (line) on open circuit. Determine the terminal voltage and voltage regulation on full-load current of 130 A when the load p.f. is (a) 0.8 lagging (b) 0.6 leading.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:6. A 3-phase, star-connected alternator has a resistance of 0.52/phase and
a synchronous reactance of 52/phase. It is excited to give 6600 V (line)
on open circuit. Determine the terminal voltage and voltage regulation on
full-load current of 130 A when the load p.f. is (a) 0.8 lagging (b) 0.6
leading.
(Ans. (a) 3340 V (phase value); 14.1% (b) 4260 V (phase value); -
10.6%)
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