Find the all-day efficiency of a 1500kVA transformer whose copper losses and iron losses at full load are 4 kW and 3kW respectively. During the day of it is loaded as under: Number of hours Load in kW Power factor 6 1100 0.8 10 1000 0.75 4 500 0.8 4 0

Find the all-day efficiency of a 1500kVA transformer whose copper losses and iron losses at full load are 4 kW and 3kW respectively. During the day of it is loaded as under: Number of hours Load in kW Power factor 6 1100 0.8 10 1000 0.75 4 500 0.8 4 0

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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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

Find the all-day efficiency of a 1500kVA transformer whose copper losses and iron
losses at full load are 4 kW and 3kW respectively. During the day of it is loaded as
under:
Number of hours
Load in kW
Power factor
6
1100
0.8
10
1000
0.75
4
500
0.8
4
0

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