The effective armature resistance of a 3-phase, star connected, 500 kVA, 1100 V alternator is 0.1 per phase. Field current of 30 A produces the open circuit voltage of 400 V (line value) and the short circuit current of 200 A. Calculate the full load regulation at 0.8 power factor lagging.

The effective armature resistance of a 3-phase, star connected, 500 kVA, 1100 V alternator is 0.1 per phase. Field current of 30 A produces the open circuit voltage of 400 V (line value) and the short circuit current of 200 A. Calculate the full load regulation at 0.8 power factor lagging.

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

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

The effective armature resistance of a 3-phase, star connected, 500 kVA, 1100 V alternator is 0.102
per phase. Field current of 30 A produces the open circuit voltage of 400 V (line value) and the short circuit
current of 200 A. Calculate the full load regulation at 0.8 power factor lagging.

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