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 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 p.f. and (b) 0.8 p.f.
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 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 p.f. and (b) 0.8 p.f.
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 3.3P: Consider an ideal transformer with N1=3000andN2=1000 turns. Let winding 1 be connected to a source...
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