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Q19. A 33 KV line has a resistance of 4 ohm and reactance of 16 ohm respectively. The line is connected to a generating station bus bars through a 6000 KVA step up transformer which has a reactance of 6%. The station has two generators rated 10,000 KVA with 10% reactance and 5000 KVA with 5% reactance. Calculate (i)the fault current and(ii) short circuit MVA when a 3-phase fault occurs at the h.v. terminals of the transformers and at the load end of the line. (Neglect the voltages) 10,000 KVA 10% 60,000 KVA 33 KV 4+j 16 5% 5.000 KVA O 0.399 p.u., 43.43 MVA O None of the above 0.299 p.u. 33.43 MVA 0.499 p.u. 53.43 MVA FL20, AY2020-2021 Page 4

Q19. A 33 KV line has a resistance of 4 ohm and reactance of 16 ohm respectively. The line is connected to a generating station bus bars through a 6000 KVA step up transformer which has a reactance of 6%. The station has two generators rated 10,000 KVA with 10% reactance and 5000 KVA with 5% reactance. Calculate (i)the fault current and(ii) short circuit MVA when a 3-phase fault occurs at the h.v. terminals of the transformers and at the load end of the line. (Neglect the voltages) 10,000 KVA 10% 60,000 KVA 33 KV 4+j 16 5% 5.000 KVA O 0.399 p.u., 43.43 MVA O None of the above 0.299 p.u. 33.43 MVA 0.499 p.u. 53.43 MVA FL20, AY2020-2021 Page 4

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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189.3L 15.65°KV, 425 L-35.77° A,0.75 lag lag Q19. A 33 KV line has a resistance of 4 ohm and reactance of 16 ohm respectively. The line is connected to a generating station bus bars through a 6000 KVA step up transformer which has a reactance of 6%. The station has two generators rated 10,000 KVA with 10% reactance and 5000 KVA with 5% reactance. Calculate (i)the fault current and(ii) short circuit MVA when a 3-phase fault occurs at the h.v. terminals of the transformers and at the load end of the line. (Neglect the voltages) 10,000 KVA 10% 60,000 KVA 33 KV 4+j 16 5% 5.000 KVA O| 0.399 p.u., 43.43 MVA O None of the above 0.299 p.u. 33.43 MVA 口 0.499 p.u. 53.43 MVA FL20, AY2020-2021 Page 4 h (U.S.)
Transcribed Image Text:189.3L 15.65°KV, 425 L-35.77° A,0.75 lag lag Q19. A 33 KV line has a resistance of 4 ohm and reactance of 16 ohm respectively. The line is connected to a generating station bus bars through a 6000 KVA step up transformer which has a reactance of 6%. The station has two generators rated 10,000 KVA with 10% reactance and 5000 KVA with 5% reactance. Calculate (i)the fault current and(ii) short circuit MVA when a 3-phase fault occurs at the h.v. terminals of the transformers and at the load end of the line. (Neglect the voltages) 10,000 KVA 10% 60,000 KVA 33 KV 4+j 16 5% 5.000 KVA O| 0.399 p.u., 43.43 MVA O None of the above 0.299 p.u. 33.43 MVA 口 0.499 p.u. 53.43 MVA FL20, AY2020-2021 Page 4 h (U.S.)
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