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In a factory. the following are the loads: Induction motors: 90 hp. 0.7 power factor. 0.82 efficiency Lighting and heating: 10 kW Synchronous motor: 20 kVA unity power factor a) Determine the overal power factor of the factory loads b) To improve the the factory power factor. the synchronous motor is overexcited without any change in its load. Determine the VAr that must be injected by the synchronous motor to raise the overall power factor of the factory to 0.9. 1 hp =746 W

In a factory. the following are the loads: Induction motors: 90 hp. 0.7 power factor. 0.82 efficiency Lighting and heating: 10 kW Synchronous motor: 20 kVA unity power factor a) Determine the overal power factor of the factory loads b) To improve the the factory power factor. the synchronous motor is overexcited without any change in its load. Determine the VAr that must be injected by the synchronous motor to raise the overall power factor of the factory to 0.9. 1 hp =746 W

Introductory Circuit Analysis (13th Edition)
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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In a factory, the following are the loads: Induction motors: 90 hp. 0.7 power factor. 0.82 efficiency Lighting and heating: 10 kW Synchronous motor: 20 kVA unity power factor a) Determine the overal power factor of the factory loads b) To improve the the factory power factor. the synchronous motor is overexcited without any change in its load. Determine the VAr that must be injected by the synchronous motor to raise the overall power factor of the factory to 0.9. 1 hp =746 W
Transcribed Image Text:In a factory, the following are the loads: Induction motors: 90 hp. 0.7 power factor. 0.82 efficiency Lighting and heating: 10 kW Synchronous motor: 20 kVA unity power factor a) Determine the overal power factor of the factory loads b) To improve the the factory power factor. the synchronous motor is overexcited without any change in its load. Determine the VAr that must be injected by the synchronous motor to raise the overall power factor of the factory to 0.9. 1 hp =746 W
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