The required no-load voltage ratio in a 150 kVA single-phase 50 Hz core-type, two-winding transformer is 5000/250 V. Calculate the percent efficiency at half-rated kVA and unity power-factor. The full-load I2R loss is 1800 W and the core loss is 1500 W. Give your answer correct to one decimal place

The required no-load voltage ratio in a 150 kVA single-phase 50 Hz core-type, two-winding transformer is 5000/250 V. Calculate the percent efficiency at half-rated kVA and unity power-factor. The full-load I2R loss is 1800 W and the core loss is 1500 W. Give your answer correct to one decimal place

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 3.29MCQ: For developing per-unit equivalent circuits of single-phase three-winding transformer, a common...

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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 required no-load voltage ratio in a 150 kVA single-phase 50 Hz core-type, two-winding transformer is 5000/250 V. Calculate the percent efficiency at half-rated kVA and unity power-factor. The full-load I²R loss is 1800 W and the core loss is 1500 W. Give your answer correct to one decimal place

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