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A) Calculate the efficiency of the test transformer at the following loading conditions :(X=15%, 25%, 50%, 75%, 100% and 125% of the full load), for the following load types: i. Resistive load (Cos=1). ii. Inductive load (Coso=0.8 lagging). B) From part (A) draw in the same graph paper the plot of efficiency (Y-axis) vs output power (X-axis) of the transformer for both resistive and inductive loads. Take the scale of X-axis,each 1 cm =100 W. Take the scale of Y-axis,each 1 cm =4%. C) Discuss the plots of part (B).

A) Calculate the efficiency of the test transformer at the following loading conditions :(X=15%, 25%, 50%, 75%, 100% and 125% of the full load), for the following load types: i. Resistive load (Cos=1). ii. Inductive load (Coso=0.8 lagging). B) From part (A) draw in the same graph paper the plot of efficiency (Y-axis) vs output power (X-axis) of the transformer for both resistive and inductive loads. Take the scale of X-axis,each 1 cm =100 W. Take the scale of Y-axis,each 1 cm =4%. C) Discuss the plots of part (B).

Power System Analysis and Design (MindTap Course List)
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) Calculate the efficiency of the test transformer at the following loading conditions :(X=15%, 25%, 50%, 75%, 100% and 125% of the full load), for the following load types: i. Resistive load (Cos=1). ii. Inductive load (Coso=0.8 lagging). B) From part (A) draw in the same graph paper the plot of efficiency (Y-axis) vs output power (X-axis) of the transformer for both resistive and inductive loads. Take the scale of X-axis,each 1 cm =100 W. Take the scale of Y-axis,each 1 cm =4%. C) Discuss the plots of part (B).
Transcribed Image Text:A) Calculate the efficiency of the test transformer at the following loading conditions :(X=15%, 25%, 50%, 75%, 100% and 125% of the full load), for the following load types: i. Resistive load (Cos=1). ii. Inductive load (Coso=0.8 lagging). B) From part (A) draw in the same graph paper the plot of efficiency (Y-axis) vs output power (X-axis) of the transformer for both resistive and inductive loads. Take the scale of X-axis,each 1 cm =100 W. Take the scale of Y-axis,each 1 cm =4%. C) Discuss the plots of part (B).
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