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.

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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.
Transcribed Image Text: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.
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