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For the system shown in figure Q5. а. Determine the three-phase fault power (in MVA) and the short circuit current (in kA) for a three- phase fault on busbar A. b. How could the fault power to both parts of busbar A be reduced without additional capital expenditure? С. For your chosen arrangement what would the new level of three-phase fault power be at busbar A? T2

For the system shown in figure Q5. а. Determine the three-phase fault power (in MVA) and the short circuit current (in kA) for a three- phase fault on busbar A. b. How could the fault power to both parts of busbar A be reduced without additional capital expenditure? С. For your chosen arrangement what would the new level of three-phase fault power be at busbar A? T2

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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For the system shown in figure Q5. а. Determine the three-phase fault power (in MVA) and the short circuit current (in kA) for a three- phase fault on busbar A. b. How could the fault power to both parts of busbar A be reduced without additional capital expenditure? С. For your chosen arrangement what would the new level of three-phase fault power be at busbar A? T2 30 MVA 132 kV 132/33 kV A Grid Supply X = 0.1 pu Underground cable X = 24.3 Q/ph 10,000 MVA fault infeed *Y 0+ T1 Overhead line X = 36.45 Q/ph 60 MVA 50 MVA 11 kV 11/132 kV X = 12 % X = 11% figure Q5
Transcribed Image Text:For the system shown in figure Q5. а. Determine the three-phase fault power (in MVA) and the short circuit current (in kA) for a three- phase fault on busbar A. b. How could the fault power to both parts of busbar A be reduced without additional capital expenditure? С. For your chosen arrangement what would the new level of three-phase fault power be at busbar A? T2 30 MVA 132 kV 132/33 kV A Grid Supply X = 0.1 pu Underground cable X = 24.3 Q/ph 10,000 MVA fault infeed *Y 0+ T1 Overhead line X = 36.45 Q/ph 60 MVA 50 MVA 11 kV 11/132 kV X = 12 % X = 11% figure Q5
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