A 500-KVA, 3-phase, 50 Hz transformer has a voltage ratio (line voltages) of 33/11 kV and is delta/star connected. The resistances per phase are: high voltage 35 , low voltage 0.876 2 and the iron loss is 3050 W. Calculate the value of efficiency at full-load and one-half of full-load respectively (a) at unity pf and (b) 0.8 pf
A 500-KVA, 3-phase, 50 Hz transformer has a voltage ratio (line voltages) of 33/11 kV and is delta/star connected. The resistances per phase are: high voltage 35 , low voltage 0.876 2 and the iron loss is 3050 W. Calculate the value of efficiency at full-load and one-half of full-load respectively (a) at unity pf and (b) 0.8 pf
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 3.9P
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![A 500-kVA, 3-phase, 50 Hz transformer has a voltage ratio (line voltages) of 33/11 kV and is
delta/star connected. The resistances per phase are: high voltage 35 02, low voltage 0.876 22 and
the iron loss is 3050 W. Calculate the value of efficiency at full-load and one-half of full-load
respectively (a) at unity pf and (b) 0.8 pf](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd2a8fcd4-3892-4cbc-afa3-574ba8855dc6%2F5e3cdeb2-c5e6-4b01-88b9-fdb3905d7e99%2Fhrc6oqr_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A 500-kVA, 3-phase, 50 Hz transformer has a voltage ratio (line voltages) of 33/11 kV and is
delta/star connected. The resistances per phase are: high voltage 35 02, low voltage 0.876 22 and
the iron loss is 3050 W. Calculate the value of efficiency at full-load and one-half of full-load
respectively (a) at unity pf and (b) 0.8 pf
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