2. A 50-kVA distribution transformer has full-load efficiency at 1.0 power factor of 96%, the copper loss and iron losses then being equal. Calculate: (a) the efficiency at full-load and 0.886 lagging power factor, (b) its energy efficiency if it is loaded throughout 24 hours period as follows: No-load....... ..... 10 hrs 5 hrs Quarter load....... Half-load...... 5 hrs

2. A 50-kVA distribution transformer has full-load efficiency at 1.0 power factor of 96%, the copper loss and iron losses then being equal. Calculate: (a) the efficiency at full-load and 0.886 lagging power factor, (b) its energy efficiency if it is loaded throughout 24 hours period as follows: No-load....... ..... 10 hrs 5 hrs Quarter load....... Half-load...... 5 hrs

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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

2. A 50-kVA distribution transformer has full-load efficiency at
1.0 power factor of 96%, the copper loss and iron losses
then being equal. Calculate: (a) the efficiency at full-load
and 0.886 lagging power factor, (b) its energy efficiency if
it is loaded throughout 24 hours period as follows:
..... 10 hrs
No-load...........
Quarter load....
5 hrs
Half-load..........
.... 5 hrs
Full-load..........
4 hrs
Assume a unity power factor at all loads.

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