Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.8 pf lagging and a synchronous motor drawing 150 kVA at 0.9 pf leading, are supplied by a balanced, three-phase, 4.16-kV source. Line impedances between the source and the load are neglected. a) Determine the power factor of the combined motor-load. b) Determine the magnitude of the line current in each motor. c) Determine the magnitude of the line current delivered by the source.
Two balanced three-phase motors in parallel, an induction motor drawing 400 kW at 0.8 pf lagging and a synchronous motor drawing 150 kVA at 0.9 pf leading, are supplied by a balanced, three-phase, 4.16-kV source. Line impedances between the source and the load are neglected. a) Determine the power factor of the combined motor-load. b) Determine the magnitude of the line current in each motor. c) Determine the magnitude of the line current delivered by the source.
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.5P
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