A 50 KVA, 4,400/220V transformer has R1 = 3.45 ohm ,R2 = 0.009 ohm.The values of reactances are X1 = 5.2 ohms , X2 = 0.015 ohm Calculate the transformer a) Equivalent resistance as referred to primary b) Equivalent resistance as referred to secondary c) Equivalent reactance as referred to both primary and secondary

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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A 50 KVA, 4,400/220V transformer has R1 = 3.45 ohm ,R2 = 0.009 ohm.The values of reactances are
X1 = 5.2 ohms , X2 = 0.015 ohm Calculate the transformer
a) Equivalent resistance as referred to primary
b) Equivalent resistance as referred to secondary
c) Equivalent reactance as referred to both primary and secondary
d) Equivalent impedance as referred to primary and secondary
e) Total Cu.Loss (Copper loss = ' R) ,first using individual resistances of the two windings and
secondly using equivalent resistances as referred to each side.
Transcribed Image Text:A 50 KVA, 4,400/220V transformer has R1 = 3.45 ohm ,R2 = 0.009 ohm.The values of reactances are X1 = 5.2 ohms , X2 = 0.015 ohm Calculate the transformer a) Equivalent resistance as referred to primary b) Equivalent resistance as referred to secondary c) Equivalent reactance as referred to both primary and secondary d) Equivalent impedance as referred to primary and secondary e) Total Cu.Loss (Copper loss = ' R) ,first using individual resistances of the two windings and secondly using equivalent resistances as referred to each side.
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