The efficiency of a 1000kVA, 110/220V, 50Hz single phase transformer is 98.5% at a half load 0.8 p.f and 98.8 % at full-load unity power factor. The voltage regulation is 10% at full-load 0.707 p.f. lag. Determine 1- The efficiency at 80% load and 0.6 p.f 2- The maximum efficiency.

The efficiency of a 1000kVA, 110/220V, 50Hz single phase transformer is 98.5% at a half load 0.8 p.f and 98.8 % at full-load unity power factor. The voltage regulation is 10% at full-load 0.707 p.f. lag. Determine 1- The efficiency at 80% load and 0.6 p.f 2- The maximum efficiency.

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 3.11MCQ: For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the...

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

The efficiency of a 1000kVA, 110220V, 50Hz single phase transformer is 98.5% at a half load
08 pf and 98.8 % at full-load unity power factor. The voltage regulation is 10% at full-load
0.707 p.f. lag. Determine
1- The efficiency at 80% load and 0.6 p.f.
2- The maximum efficiency.

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