A 3-phase star connected balanced load is supplied from a 3 phase, 416 V supply. The line current is 25 A and the power taken by the load is 7800 W. Find (i) impedance in each branch (ii) power factor and (iii) power consumed if the same load is connected in delta.

A 3-phase star connected balanced load is supplied from a 3 phase, 416 V supply. The line current is 25 A and the power taken by the load is 7800 W. Find (i) impedance in each branch (ii) power factor and (iii) power consumed if the same load is connected in delta.

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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Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

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A 3-phase star connected balanced load is
supplied from a 3 phase, 416 V supply. The line
current is 25 A and the power taken by the load is
7800 W. Find (i) impedance in each branch (ii)
power factor and (iii) power consumed if the
same load is connected in delta.
Impedance
Power factor
Power when connected in delta

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