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A 50HZ turbo generator is rated 500MVA, 22KV, and its reactances are X"d=X2 = 0.15PU and Xo = 0.05PD. It is Y-connected, solidly grounded and is operating at rated voltage at no load. A) Determine the three phase fault current occurs on the terminal of generator. B) How many ohms of resistance in the neutral connection of the generator would limit the sub transient line current for a single line to ground fault to that for a three phase fault.

A 50HZ turbo generator is rated 500MVA, 22KV, and its reactances are X"d=X2 = 0.15PU and Xo = 0.05PD. It is Y-connected, solidly grounded and is operating at rated voltage at no load. A) Determine the three phase fault current occurs on the terminal of generator. B) How many ohms of resistance in the neutral connection of the generator would limit the sub transient line current for a single line to ground fault to that for a three phase fault.

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 50HZ turbo generator is rated 500MVA, 22kV, and its reactances are X"d=X2 = 0.15PU and Xo %3D = 0.05PD. It is Y-connected, solidly grounded and is operating at rated voltage at no load. A) Determine the three phase fault current occurs on the terminal of generator. B) How many ohms of resistance in the neutral connection of the generator would limit the sub transient line current for a single line to ground fault to that for a three phase fault.
Transcribed Image Text:A 50HZ turbo generator is rated 500MVA, 22kV, and its reactances are X"d=X2 = 0.15PU and Xo %3D = 0.05PD. It is Y-connected, solidly grounded and is operating at rated voltage at no load. A) Determine the three phase fault current occurs on the terminal of generator. B) How many ohms of resistance in the neutral connection of the generator would limit the sub transient line current for a single line to ground fault to that for a three phase fault.
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