A 440 V three phase, delta connected synchronous motor has load of 9 kW and synchronous reactance of 36 2 per phase with negligible armature resistance. If the excitation voltage is 560 V, then the power factor of motor is O 0.5 0.85 O 0.97 O 0.44

A 440 V three phase, delta connected synchronous motor has load of 9 kW and synchronous reactance of 36 2 per phase with negligible armature resistance. If the excitation voltage is 560 V, then the power factor of motor is O 0.5 0.85 O 0.97 O 0.44

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter8: Basic Electric Motors

Section: Chapter Questions

Problem 28RQ: What are the advantages and disadvantages of using the following types of motors? shaded-pole...

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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

A 440 V three phase, delta connected synchronous motor has load of 9 kW and synchronous reactance of 36 2
per phase with negligible armature resistance. If the excitation voltage is 560 V, then the power factor of
motor is
0.5
0.85
O 0.97
O 0.44

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