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A three-phase 480-V 1200-kVA synchronous generator supplies rated load at a lagging power factor of 75 percent. If the efficiency of the generator is 90 percent, what horsepower is the prime mover delivering to the generator?

A three-phase 480-V 1200-kVA synchronous generator supplies rated load at a lagging power factor of 75 percent. If the efficiency of the generator is 90 percent, what horsepower is the prime mover delivering to the generator?

Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter7: Parallel Circuits
Section: Chapter Questions
Problem 4PP: Using the rules for parallel circuits and Ohmslaw, solve for the missing values....
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Transcribed Image Text:L2 L3 LI Orees alwo oreeo aus ous reed. Figure 8 arus awo oreeo
B) 80 percent power factor? a) 487.5 kW - b) 780 kW c) 975 kW d) none of the above C) 50 percent power factor? a) 487.5 kW b) 780 kW c) 975 kW d) none of the above D-F. If the voltage rating is 2400 V, what is the current rating at each power factor? D) unity power factor a) 234.55 A b) 325 A c) 406.25 A d) none of the above E) 80 percent power factor a) 234.55 A b) 325 A c) 406.25 A d) none of the above F) 50 percent power factor a) 234.55 A b) 325 A c) 406.25 A d) none of the above A three-phase 480-V 1200-kVA synchronous generator supplies rated load at a lagging power factor of 75 percent. If the efficiency of the generator is 90 percent, what horsepower is the prime mover delivering to the generator? 8. a) 1201 hp b) 1340 hp c) 1787 hp d) none of the above
Transcribed Image Text:B) 80 percent power factor? a) 487.5 kW - b) 780 kW c) 975 kW d) none of the above C) 50 percent power factor? a) 487.5 kW b) 780 kW c) 975 kW d) none of the above D-F. If the voltage rating is 2400 V, what is the current rating at each power factor? D) unity power factor a) 234.55 A b) 325 A c) 406.25 A d) none of the above E) 80 percent power factor a) 234.55 A b) 325 A c) 406.25 A d) none of the above F) 50 percent power factor a) 234.55 A b) 325 A c) 406.25 A d) none of the above A three-phase 480-V 1200-kVA synchronous generator supplies rated load at a lagging power factor of 75 percent. If the efficiency of the generator is 90 percent, what horsepower is the prime mover delivering to the generator? 8. a) 1201 hp b) 1340 hp c) 1787 hp d) none of the above
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