The no-load current of a transformer is 5 A at 0.3 power factor when connected across 200 V, 50 Hz supply. The number of turns on the primary is half that of the secondary. Find the primary current if a load taking 15 A at a lagging power factor of 80% is connected across the secondary

The no-load current of a transformer is 5 A at 0.3 power factor when connected across 200 V, 50 Hz supply. The number of turns on the primary is half that of the secondary. Find the primary current if a load taking 15 A at a lagging power factor of 80% is connected across the secondary

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

The no-load current of a transformer is 5 A at 0.3
power factor when connected across 200 V, 50 Hz
supply. The number of turns on the primary is half
that of the secondary. Find the primary current if a
load taking 15 A at a lagging power factor of 80% is
connected across the secondary

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