Answered: The meter constant of a single phase…

The meter constant of a single phase 230 V, induction energy meter is 800 rev/ kWh. What will be the speed of rotation of meter disc in rpm for a current of 20 A at 0.7 pf lagging?

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

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 3RQ

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Concept explainers

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.

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The meter constant of a single phase 230 V, induction energy meter is 800 rev/ kWh. What will be the speed of rotation of meter disc in rpm for a current of 20 A at 0.7 pf lagging?

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