Answered: A 500KVA transformer has iron loss of…

A 500KVA transformer has iron loss of 500W and copper losses at full load of 2000W. Then at what KVA ,is the efficiency maximum *

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

A 500KVA transformer has iron loss of
500W and copper losses at full load of
2000W. Then at what KVA ,is the efficiency
maximum
O 250KVA
500KVA
1000KVA
125KVA

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A 100 kVA distribution transformer has an iron loss of 2.0 kW and a total load copper loss of 4.5 kW. During the day this transformer supplies a load of 80 kW at 0.8 power factor for 5 hours, a load of 42.5 kW at 0.85 power factor for 9 hours, a load of 21 kW at 0.7 power factor for 4 hours and the rest of the time the load is zero. So find its energy efficiency.