300kVA transformer has primary and secondary winding resistances of 0.5Ω, and 0.0015Ω respectively. The iron loss is 1.5 KW and the primary and secondary voltages are 5kV and 250 V respectively. If the power factor of the load is 0.8lag, find the efficiency of the transformer at 40% of full

300kVA transformer has primary and secondary winding resistances of 0.5Ω, and 0.0015Ω respectively. The iron loss is 1.5 KW and the primary and secondary voltages are 5kV and 250 V respectively. If the power factor of the load is 0.8lag, find the efficiency of the transformer at 40% of full

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 3.57P: A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when...

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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

A 300kVA transformer has primary and secondary winding resistances of 0.5Ω, and
0.0015Ω respectively. The iron loss is 1.5 KW and the primary and secondary voltages are
5kV and 250 V respectively. If the power factor of the load is 0.8lag, find the efficiency of the
transformer at 40% of full load.

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