The busbars of a gonerating station are divided into two soctions A and B by a busbar reactor rated at 8000KVA with 9% reactive drop. On busbar A there are two generators each of 8000 KVA with 12.5% reactance and on busbar B there are two generatore each of 10,000KVA with 10% reactance. Feeders are taken. from sections A and B separately. Calculate the rupturing capacity of each foeder switchgear for 3-phase faults which may occur on any feeder.

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
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.51P: The ratings of a three-phase three-winding transformer are Primary(1): Y connected 66kV,15MVA...
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The busbars of a gonerating station are divided into two soctions A and B by a busbar reactor rated at 8000KVA with 9% reactive drop. On busbar A there are two generators each of 8000 KVA with 12.5% reactance and on busbar B there are two generatore each of 10,000KVA with 10% reactance. Feeders are taken. from sections A and B separately. Calculate the rupturing capacity of each foeder switchgear for 3-phase faults which may occur on any feeder. 
Ans: Feeder A 189 MVA; Feeder B 252 MVA

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