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.
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.
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 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.
Ic 10% D
12
(M)
9KV
22/11KV
22, 000 KVA
20%.
A
Gen
600OKVA
11 KV
11/22 KX
Mz
6KY
22,000 KVA
22,000 KVA
22/7.33K
15%
15%
22, 000 KVA
14%
LAll the
given impedances are su btranslent values7](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0b1be76f-9eae-4757-9cb6-bb700e448a4b%2F3fbb7bba-0af2-4d4c-bacd-bbb4d834846b%2F9ss7nv_processed.png&w=3840&q=75)
Transcribed Image Text: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.
Ic 10% D
12
(M)
9KV
22/11KV
22, 000 KVA
20%.
A
Gen
600OKVA
11 KV
11/22 KX
Mz
6KY
22,000 KVA
22,000 KVA
22/7.33K
15%
15%
22, 000 KVA
14%
LAll the
given impedances are su btranslent values7
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