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Problem Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.80 power factor lagging and a synchronous motor drawing 150 kVA at 0.90 power factor leading, are supplied by a balanced, three-phase 4160-volt source. Cable impedances between the source and load are neglected. (a) Draw the power triangle for each motor and for the combined-motor load. (b) Determine the power factor of the combined-motor load. (c) Determine the magnitude of the line current delivered by the source.

Problem Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.80 power factor lagging and a synchronous motor drawing 150 kVA at 0.90 power factor leading, are supplied by a balanced, three-phase 4160-volt source. Cable impedances between the source and load are neglected. (a) Draw the power triangle for each motor and for the combined-motor load. (b) Determine the power factor of the combined-motor load. (c) Determine the magnitude of the line current delivered by the source.

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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Problem Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.80 power factor lagging and a synchronous motor drawing 150 kVA at 0.90 power factor leading, are supplied by a balanced, three-phase 4160-volt source. Cable impedances between the source and load are neglected. (a) Draw the power triangle for each motor and for the combined-motor load. (b) Determine the power factor of the combined-motor load. (c) Determine the magnitude of the line current delivered by the source.
Transcribed Image Text:Problem Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.80 power factor lagging and a synchronous motor drawing 150 kVA at 0.90 power factor leading, are supplied by a balanced, three-phase 4160-volt source. Cable impedances between the source and load are neglected. (a) Draw the power triangle for each motor and for the combined-motor load. (b) Determine the power factor of the combined-motor load. (c) Determine the magnitude of the line current delivered by the source.
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