A 24-kVA, 120/480-V, step-up transformer performs at its maximum efficiency at 75% of its rated load with a unity power factor. The core loss is 1.2 kW. What is the equivalent winding resistance as referred to the primary side? Answer = (53.3 mΩ) What is the efficiency of the transformer if it delivers the rated load at a power factor of 0.9 lagging? Answer = (86.6%)
A 24-kVA, 120/480-V, step-up transformer performs at its maximum efficiency at 75% of its rated load with a unity power factor. The core loss is 1.2 kW. What is the equivalent winding resistance as referred to the primary side? Answer = (53.3 mΩ) What is the efficiency of the transformer if it delivers the rated load at a power factor of 0.9 lagging? Answer = (86.6%)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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A 24-kVA, 120/480-V, step-up transformer
performs at its maximum efficiency at 75% of
its rated load with a unity power factor. The
core loss is 1.2 kW.
What is the equivalent winding resistance as
referred to the primary side? Answer = (53.3 mΩ)
What is the efficiency of the transformer if it
delivers the rated load at a power factor of
0.9 lagging? Answer = (86.6%)
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