1. A 50 KVA, 1100/220 V, single-phase transformer is used to serve a prime subdivision. The core loss is 4050 W and the primary impedance of 0.15 + j 0.24 ohms and secondary impedance of 0.13 + j 0.18 ohm. Calculate: A. Calculate the full-load copper loss. B. Calculate the efficiency at full-load at 0.85 power factor lagging. C. Calculate the efficiency at half-load at 0.9 power factor lagging. D. Calculate the maximum efficiency at 0.8 power factor lagging. E. Calculate the efficiency at 35 KW loading, 0.707 power factor lagging.
1. A 50 KVA, 1100/220 V, single-phase transformer is used to serve a prime subdivision. The core loss is 4050 W and the primary impedance of 0.15 + j 0.24 ohms and secondary impedance of 0.13 + j 0.18 ohm. Calculate: A. Calculate the full-load copper loss. B. Calculate the efficiency at full-load at 0.85 power factor lagging. C. Calculate the efficiency at half-load at 0.9 power factor lagging. D. Calculate the maximum efficiency at 0.8 power factor lagging. E. Calculate the efficiency at 35 KW loading, 0.707 power factor lagging.
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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ANSWER THE FF. PROBLEM, ANSWERS MUST BE IN 2 DECIMAL PLACES AND DRAW AN ILLUSTRATION TO UNDERSTAND IT MORE.
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