35. Three single-phase transformers, cach of 100 kVA rating, are connected in a closed-delta arrangement. If one of them is taken out, it would be possible to load the bank in such a manner that cach one is loaded to the extent of: A 86.6 kVA C. 57.7KVA B. 66.7 kVA D. 33.33 kVA
35. Three single-phase transformers, cach of 100 kVA rating, are connected in a closed-delta arrangement. If one of them is taken out, it would be possible to load the bank in such a manner that cach one is loaded to the extent of: A 86.6 kVA C. 57.7KVA B. 66.7 kVA D. 33.33 kVA
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Three-Phase Transformers
Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.
Transformer
Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.
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Transcribed Image Text:Transkrmers
phase with each
bank with -
adjuste
35. Three single-phase transformers, cach of 100 kVA rating, are conected in a closed-delta
arrangement. If one of them is taken out, it would be possible to load the bank in such a manner that
cach one is loaded to the extent of:
A 86.6 kVA
C. 57.7KVA
B. 66.7 kVA
D. 33.33 kVA
when load is at unity power factor.
36. Average power factor at which V-V bank separate is
A 86.6%
C. 66.67%
В. 73.3%
D. None of these
37. Scott connections are used for:
A. single-phase to three-phase transformation
C. three-phase to two-phase transformation
B. three-phase to single-phase transformation
(D Any of the above
38. The current in low voltage winding of a 25 kVA, 6600/400 V, 50 Hz, 3-phase Y-A transformer, at
full load is:
A 36 A
Č. 65,32 A
B. 20.78 A
D. 40.2 A
39. The current in high voltage winding of a 20 kVA, 2200/220 V, 50 Hz, 3-phase A-A transformer, at
full load is:
(A. 3.03 A
C. jo.5 A
B. 5.25 A
D. None of above
40. The current in low voltage winding of a 20 kVA, 2200/220 V, 50 Hz, 3-phase A-A transformer, at
full load is:
B 30,30 A
D None of above
A. 52.48 A
С. 26.24 A
O00 SPARK 4
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