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A three phase power system is shown below. Lines 2-3 and 4-3 are stated below. If the three phase fault occurs at bus 4, determine: (a) the fault current supplied by Gl; the fault current supplied by G2; (c) MVA short circuit at bus 4. 9 T1 m G2 10 5 2― Y 12 T2 4 3 Generator G1: Generator G2: Transformer T1: Transformer T2: Each 138-kV line: 50 MVA, 12 kV, X" = 0.2 per unit 100 MVA, 15 kV, X" = 0.2 per unit 50 MVA, 10 kV Y/138 kV Y, X = 0.10 per unit 100 MVA, 15 kV A/138 kV Y, X = 0.10 per unit X₁ = 40 2

A three phase power system is shown below. Lines 2-3 and 4-3 are stated below. If the three phase fault occurs at bus 4, determine: (a) the fault current supplied by Gl; the fault current supplied by G2; (c) MVA short circuit at bus 4. 9 T1 m G2 10 5 2― Y 12 T2 4 3 Generator G1: Generator G2: Transformer T1: Transformer T2: Each 138-kV line: 50 MVA, 12 kV, X" = 0.2 per unit 100 MVA, 15 kV, X" = 0.2 per unit 50 MVA, 10 kV Y/138 kV Y, X = 0.10 per unit 100 MVA, 15 kV A/138 kV Y, X = 0.10 per unit X₁ = 40 2

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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A three phase power system is shown below. Lines 2-3 and 4-3 are stated below. If the three phase fault occurs at bus 4, determine: (a) the fault current supplied by Gl; the fault current supplied by G2; (c) MVA short circuit at bus 4. 9 T1 m G2 10 5 2― Y 12 T2 4 3 Generator G1: Generator G2: Transformer T1: Transformer T2: Each 138-kV line: 50 MVA, 12 kV, X" = 0.2 per unit 100 MVA, 15 kV, X" = 0.2 per unit 50 MVA, 10 kV Y/138 kV Y, X = 0.10 per unit 100 MVA, 15 kV A/138 kV Y, X = 0.10 per unit X₁ = 40 2
Transcribed Image Text:A three phase power system is shown below. Lines 2-3 and 4-3 are stated below. If the three phase fault occurs at bus 4, determine: (a) the fault current supplied by Gl; the fault current supplied by G2; (c) MVA short circuit at bus 4. 9 T1 m G2 10 5 2― Y 12 T2 4 3 Generator G1: Generator G2: Transformer T1: Transformer T2: Each 138-kV line: 50 MVA, 12 kV, X" = 0.2 per unit 100 MVA, 15 kV, X" = 0.2 per unit 50 MVA, 10 kV Y/138 kV Y, X = 0.10 per unit 100 MVA, 15 kV A/138 kV Y, X = 0.10 per unit X₁ = 40 2
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