An electrodynamometer type wattmeter is used to measure power in 1-o circuit. The connected load draws 7 A at lagging power factor of 0.707 when fed by 230 V, 50 Hz ac supply. Wattmeter pressure coil impedance angle is 30°. The error in the reading will be

An electrodynamometer type wattmeter is used to measure power in 1-o circuit. The connected load draws 7 A at lagging power factor of 0.707 when fed by 230 V, 50 Hz ac supply. Wattmeter pressure coil impedance angle is 30°. The error in the reading will be

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

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter15: Residential Air-conditioning Control Systems

Section: Chapter Questions

Problem 26RQ

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An electrodynamometer type wattmeter is used to measure power in 1-o circuit. The connected
load draws 7 A at lagging power factor of 0.707 when fed by 230 V, 50 Hz ac supply. Wattmeter
pressure coil impedance angle is 30°. The error in the reading will be

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