(i) A 3-Phase, 440V motor load has a power factor of 0.6. Two wattmeters connected to measure the power show the input to be 25kW. Find the reading on each instrument. (ii) What are the important difference between moving-coil and moving-iron instrument?

(i) A 3-Phase, 440V motor load has a power factor of 0.6. Two wattmeters connected to measure the power show the input to be 25kW. Find the reading on each instrument. (ii) What are the important difference between moving-coil and moving-iron instrument?

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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(i) A 3-Phase, 440V motor load has a power factor of 0.6. Two wattmeters connected to measure the power show the input to be 25kW. Find the reading on each instrument.
(ii) What are the important difference between moving-coil and moving-iron instrument?

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