1. A 200/250 V auto-transformer draws power from a 200 V line and supplies a 5-kW load with a power factor of 0.5 lagging. A second load of 2 kW is supplied at unity power factor from 100 V winding. Neglecting losses, calculate the current drawn by the transformer from the 200 V line and its power factor. [42.64 A, 0.898]

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 3.28MCQ
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1. A 200/250 V auto-transformer
draws power from a 200 V line
and supplies a 5-kW load with
a power factor of 0.5 lagging.
A second load of 2 kW is
supplied at unity power factor
from 100 V winding.
Neglecting losses, calculate
the current drawn by the
transformer from the 200 V
line and its power factor.
[42.64 A, 0.898]
Transcribed Image Text:1. A 200/250 V auto-transformer draws power from a 200 V line and supplies a 5-kW load with a power factor of 0.5 lagging. A second load of 2 kW is supplied at unity power factor from 100 V winding. Neglecting losses, calculate the current drawn by the transformer from the 200 V line and its power factor. [42.64 A, 0.898]
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