b) A 300KVA, 3-phase, 50Hz transformer has a voltage ratio (line voltages) of 22/11KV and is delta/star connected. The resistances per phase for high voltage winding are 30 2 and 1 2 for low voltage windings. If the iron loss is 2Kw, calculate i. the equivalent resistance per phase referred to secondary full load copper losses ii. 111. the efficiency at full load 0.8 power factor.
b) A 300KVA, 3-phase, 50Hz transformer has a voltage ratio (line voltages) of 22/11KV and is delta/star connected. The resistances per phase for high voltage winding are 30 2 and 1 2 for low voltage windings. If the iron loss is 2Kw, calculate i. the equivalent resistance per phase referred to secondary full load copper losses ii. 111. the efficiency at full load 0.8 power factor.
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 3.26P: A bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a...
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