Example 1: The power supplied to a balanced Y-connected load is measured by the two- wattmeter method. Determine the power reading for each meter if each load is 47 <45°, and the line voltage is 122 V. 47.4w 176.8 Example IA A VBC VCA W₂ W₁ mi IB. Ic. IN VXN Z VYN IXN VZN IZN Z

Q: 2. Obtain the symmetrical components of a set of unbalanced currents: IA = 1.6 225 IB = 1.0 2180

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Q: In the two-wattmeter method of measuring 3-phase power, the wattmeters indicate equal and opposite…

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Q: Question #4 For the circuit below, 71 220/0° V 220-120° V 220/120° V a b C A B 10Ω j5Ω 10Ω j5Ω wwwmN…

A: As the given system is balanced three phase system, so we will do all the calculations on per phase…

Q: Exercice: The circuit in the figure shows a symmetrical load connected in a triangle, whose branch…

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Q: Z, E b. Refer to the above AC bridge Which one is the correct statement? Select one: O a. Under…

A: To find the condition when the AC bridge is balanced

Q: 7. In a WYE configuration, Line to Line voltage is equal to

A: WYE Connection(Y-Connection): It is also called Star Connection. The Star Connection (Y) Method,…

Q: 150mH .. .. .. |L1. 150mH C1 V2 120Vrms 60HZ 0° =22µF .. R1 602

A: Given a circuit : We need to : a. Measure Vrms and Irms across ZLoad. Insert a capture of your…

Q: 4. Solve for the line and phase currents in the Y- A circuit. Take ZA=60<45° Ohms. Calculate 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.