Two wattmeters used to measure the power input in a 3.phase circuit indicate 1000 W and 500 W respectively. Find the power factor of the circuit (i) when both wattmeter readings are positive ; and (ii) when the latter is obtained by reversing the current coil connections. (Ans.0.866 (lag):0.1889 (lag)
Two wattmeters used to measure the power input in a 3.phase circuit indicate 1000 W and 500 W respectively. Find the power factor of the circuit (i) when both wattmeter readings are positive ; and (ii) when the latter is obtained by reversing the current coil connections. (Ans.0.866 (lag):0.1889 (lag)
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 8RQ
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Two wattmeters used to measure the power input in a 3.phase circuit indicate 1000 W and 500 W respectively. Find the power factor of the circuit
(i) when both wattmeter readings are positive ; and
(ii) when the latter is obtained by reversing the current coil connections.
(Ans.0.866 (lag):0.1889 (lag)
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