In a 3-phase power measurement using two wattmeter method, if one wattmeter reads 2 times the other, then the power factor is O 1 O 0.756 O 0.866

Q: What is the difference between direct and alternating current? p 3:01 Why are alternating current…

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Q: The power factor of the circuit shown in figure 1 is a. 0.8 lagging b. 0.75 lagging c. 0.4 lagging…

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Q: In the circuit shown below, what would be the wattmeter reading? 200 V {4 + j3} Ω 50/5 A CT m www.m…

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Q: 1. Find the overall power factor and source current Io in the following circuit. 1.2 kW 0.8 KVAR…

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Q: Connected to the same circuit are two equipment: a. Equipment 1 draws 9.9 kW at unity power factor…

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Q: 9 ohms 12 V 8 ohms 16 V || 7 ohms 18 V 3 ohms suyo

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Q: How to calculate to continues power of 500KVA generator at 60hz, 440v, pf

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Q: The voltage-flux adjustment of a certain single phase 220 V induction watthour meter is altered so…

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Q: 5) Determine all the currents and voltages in the figure below. 84 . I1 · 20Ω 12 10Ω L ΣΩ Σ0Ω

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Q: determine the currents and the voltages with kirchhoff's law

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Q: a) A 18 V voltage source is applied across a circuit consisting of a 481 ohm resistor in series with…

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Q: In the circuit shown below, what would be the wattmeter reading? 200 VI (4 + j3) Q 50/5 ACT my www.m…

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Q: What is the wattmeter recing if XC=10.9 OHM

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Q: A 300 V, 5A, 0.2 pf low power factor wattmeter is used to measure the power consumed by a load. The…

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Q: 2. Calculate the power absorbed by each element. I-5A P2 6A 12V 20 V P3 SV P4 0.21

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Q: The meter constant of a single phase energy meter is 500 rev/kWh. It is found that with a load of 5…

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Q: What is the total apparent, reactive and real power of the network in figure 1? Also, determine the…

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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.