A single-line diagram of a three-phase balanced system is given below. A bolted three- phase short circuit occurs at point P, when the operating voltage was 21 kV there. Calculate the rated interrupting current rating of circuit breaker A, D and E, both in per unit and Ampere value. lc,10% D 8000KVA M) 9KV 20%. 12 22/11KV 22,000 KVA A Gen 11/22 KY 6000KVA Mz) 11 КУ GKY 15% 22,000 KVA 22,000 KVA 22/7.33K 15% 22,000 KVA 14% All tue given impedances are su btoanslent raluesT

A single-line diagram of a three-phase balanced system is given below. A bolted three- phase short circuit occurs at point P, when the operating voltage was 21 kV there. Calculate the rated interrupting current rating of circuit breaker A, D and E, both in per unit and Ampere value. lc,10% D 8000KVA M) 9KV 20%. 12 22/11KV 22,000 KVA A Gen 11/22 KY 6000KVA Mz) 11 КУ GKY 15% 22,000 KVA 22,000 KVA 22/7.33K 15% 22,000 KVA 14% All tue given impedances are su btoanslent raluesT

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 3.49P: Consider the single-Line diagram of a power system shown in Figure 3.42 with equipment ratings...

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A single-line diagram of a three-phase balanced system is given below. A bolted threephase short circuit occurs at point P, when the operating voltage was 21 kV there. Calculate the rated interrupting current rating of circuit breaker A, D and E, both in per unit and Ampere value. Answer follow image.
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