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A 3Ø, 2000KW, 480V A-connected alternator is short-circuited and is operated at rated speed to produce rated current at 4A excitation. With the short-circuit remove and with the excitation adjusted to 5A, the voltage between stator terminal is 330V. The effective resistance between terminal as measured with dc is 20. Determine the %V.R. of the alternator at half-load and pf of 0.8 leading without changing any given values.

A 3Ø, 2000KW, 480V A-connected alternator is short-circuited and is operated at rated speed to produce rated current at 4A excitation. With the short-circuit remove and with the excitation adjusted to 5A, the voltage between stator terminal is 330V. The effective resistance between terminal as measured with dc is 20. Determine the %V.R. of the alternator at half-load and pf of 0.8 leading without changing any given values.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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A 3Ø, 2000KW, 480V A-connected alternator is short-circuited and is operated at rated speed to produce rated current at 4A excitation. With the short-circuit remove and with the excitation adjusted to 5A, the voltage between stator terminal is 330V. The effective resistance between terminal as measured with dc is 20. Determine the %V.R. of the alternator at half-load and pf of 0.8 leading without changing any given values.
Transcribed Image Text:A 3Ø, 2000KW, 480V A-connected alternator is short-circuited and is operated at rated speed to produce rated current at 4A excitation. With the short-circuit remove and with the excitation adjusted to 5A, the voltage between stator terminal is 330V. The effective resistance between terminal as measured with dc is 20. Determine the %V.R. of the alternator at half-load and pf of 0.8 leading without changing any given values.
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