A three phase 110 kVA ,50 Hz, 3300/420.89 V, delta-star transformer. The transformer has a primary impedance per phase of 3.6 + j13.6 Q, a secondary impedance per phase of 0.03 + j0.19 Q If the full load efficiency is 96 % at a powe factor of 0.813 lagging. Determine using the approximate equivalent circuit diagram: 4.1 the per unit equivalent impedance of the transformer 4.2 the iron losses of the transformer 4.3 the per unit voltage regulation at full-load 4.4 the secondary terminal voltage on full load 4.5 the maximum efficiency of the transformer at power factor of 0.813 lagging
A three phase 110 kVA ,50 Hz, 3300/420.89 V, delta-star transformer. The transformer has a primary impedance per phase of 3.6 + j13.6 Q, a secondary impedance per phase of 0.03 + j0.19 Q If the full load efficiency is 96 % at a powe factor of 0.813 lagging. Determine using the approximate equivalent circuit diagram: 4.1 the per unit equivalent impedance of the transformer 4.2 the iron losses of the transformer 4.3 the per unit voltage regulation at full-load 4.4 the secondary terminal voltage on full load 4.5 the maximum efficiency of the transformer at power factor of 0.813 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 3.14P: A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down...
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