10. Excitation losses in a transformer must be determined. When running the test, you should make sure that the secondary winding A. carries exactly the rated current. B. is open-circuited. C. is short-circuited D. carries a higher current than the primary. 11. The armature of a 100-kw 250-volt shunt-wound generator has a resistance of 0.02 ohm. When the generator is operated as a motor, what input voltage should be applied across the brushes to measure the no-load losses if the brush-contact IR drop is 2 volts? A. 240 volts B. 248 volts C. 260 volts D. 252 volts
10. Excitation losses in a transformer must be determined. When running the test, you should make sure that the secondary winding A. carries exactly the rated current. B. is open-circuited. C. is short-circuited D. carries a higher current than the primary. 11. The armature of a 100-kw 250-volt shunt-wound generator has a resistance of 0.02 ohm. When the generator is operated as a motor, what input voltage should be applied across the brushes to measure the no-load losses if the brush-contact IR drop is 2 volts? A. 240 volts B. 248 volts C. 260 volts D. 252 volts
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
Chapter10: System Protection
Section: Chapter Questions
Problem 10.27P
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