A 100-kVA, 3,000-V, 50-Hz, 3-phase star-connected alternator has effective armature resistance of 0.2Q. A field current of 40 A produces short-circuit current of 200 A and an open-circuit e.m.f. of 1040 V (line value). Calculate the full-load percentage regulation at a power factor of 0.8 lagging. How will the regulation be affected if the alternator delivers its full-load output at a power factor of 0.8 leading? [24.4% – 13.5%] (Elect. Machines-II, Indore Univ. July 1977)
A 100-kVA, 3,000-V, 50-Hz, 3-phase star-connected alternator has effective armature resistance of 0.2Q. A field current of 40 A produces short-circuit current of 200 A and an open-circuit e.m.f. of 1040 V (line value). Calculate the full-load percentage regulation at a power factor of 0.8 lagging. How will the regulation be affected if the alternator delivers its full-load output at a power factor of 0.8 leading? [24.4% – 13.5%] (Elect. Machines-II, Indore Univ. July 1977)
Introductory Circuit Analysis (13th Edition)
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Chapter1: Introduction
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Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Question
![A 100-kVA, 3,000-V, 50-Hz, 3-phase star-connected alternator has effective armature
resistance of 0.2 Q. A field current of 40 A produces short-circuit current of 200 A and an
open-circuit e.m.f. of 1040 V (line value). Calculate the full-load percentage regulation at
a power factor of 0.8 lagging. How will the regulation be affected if the alternator delivers
its full-load output at a power factor of 0.8 leading?
[24.4% – 13.5%] (Elect. Machines-II, Indore Univ. July 1977)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F940c5be8-6442-4b16-b023-9d1748248b80%2F8652a411-efe7-4a1e-bdb4-da0e3d6d5560%2F9rp5zwi_processed.png&w=3840&q=75)
Transcribed Image Text:A 100-kVA, 3,000-V, 50-Hz, 3-phase star-connected alternator has effective armature
resistance of 0.2 Q. A field current of 40 A produces short-circuit current of 200 A and an
open-circuit e.m.f. of 1040 V (line value). Calculate the full-load percentage regulation at
a power factor of 0.8 lagging. How will the regulation be affected if the alternator delivers
its full-load output at a power factor of 0.8 leading?
[24.4% – 13.5%] (Elect. Machines-II, Indore Univ. July 1977)
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