A 2MVA, 2.3kV 3-phase Y-connected alternator operates at rated kVA at a power factor of 80%. The DC armature winding resistance between terminals is 0.08 ohm. The field takes 70A at 125V from an exciter equipment. Friction and windage loss are 20kW, iron losses 36kW and stray load losses are 2kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance is 120% of the DC resistance.

A 2MVA, 2.3kV 3-phase Y-connected alternator operates at rated kVA at a power factor of 80%. The DC armature winding resistance between terminals is 0.08 ohm. The field takes 70A at 125V from an exciter equipment. Friction and windage loss are 20kW, iron losses 36kW and stray load losses are 2kW. Calculate the efficiency of the alternator. Assume the effective armature winding resistance is 120% of the DC resistance.

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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