In two wattmeter 3-phase power measurement method, if the two wattmeter readings are equal then thepower factor of the circuit is0.51O 0.866In 3-phase system, the power consumed by delta connected load istimes more than starconnected load.O 3 timesO 2 timesO/3 timesO 2 times

Therefore, if the two wattmeter readings are equal then power factor of the circuit is unity (1).…

In two wattmeter 3-phase power measurement method, if the two wattmeter readings are equal then the power factor of the circuit is O 0.5 0 1 O 0.866 In 3-phase system, the power consumed by delta connected load is times more than star connected load. O 3 times O 2 times O /3 times O 2 times

In two wattmeter 3-phase power measurement method, if the two wattmeter readings are equal then the power factor of the circuit is O 0.5 0 1 O 0.866 In 3-phase system, the power consumed by delta connected load is times more than star connected load. O 3 times O 2 times O /3 times O 2 times

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.28P: For the system shown in Figure 3.34. draw an impedance diagram in per unit by choosing 100 kVA to be...

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Concept explainers

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.

Question

In two wattmeter 3-phase power measurement method, if the two wattmeter readings are equal then the
power factor of the circuit is
0.5
1
O 0.866
In 3-phase system, the power consumed by delta connected load is
times more than star
connected load.
O 3 times
O 2 times
O/3 times
O 2 times

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