7.73 To correct the power factor problems of the motorin Problem 7.72, the company has decided to installcapacitors as shown in Figure P7.73. Assume rmsvalues.a. What capacitance must be installed to achieve aunity power factor if the line frequency is 60 Hz?b. Repeat part a if the power factor is to be 0.85(lagging).50j6250jó N50j6 2Figure P7.73alleleww

The circuit diagram is, From the circuit,

Answered: 7.73 To correct the power factor…

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

Chapter2: Fundamentals

Section: Chapter Questions

Problem 2.13MCQ

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Similar questions

For the circuit shown in Figure P7.43, assume thatvg = 120 V rms. Finda. The total resistance seen by the voltage source.b. The primary current.c. The primary power.
Analyze the impact of harmonics in power systems and propose mitigation techniques.
Explain the concept of power quality and the various disturbances that can affect it, such as harmonics and transients.
1. Write down a formula for the three-phase power factor, assuming perfectly sinusoidal and symmetrical conditions, using line-line voltage measurements. 2. Write down a formula that relates three-phase apparent power to active and reactive power. 3. Draw a graph that depict single-phase waveforms for a purely sinusoidal 50 Hz voltage and a lagging current.
While the instantaneous electric power delivered by a single-phase generator under balanced steady-state conditions is a function of time havi ng two components of a constant and a double-frequency sinusoid, the total instantaneous electric power delivered by a three-phase generator under balanced steady-state conditions is a constant. (a) True (b) False
The instantaneous power absorbed by the load in a single-phase ac circuit, for a general R LC load under sinusoidal-steady-state excitation. is (a) Nonzero constant (b) Zero (c) Containing double-frequency components
A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and L=40mH. (a) Determine the power factor of the circuit and state whether it is lagging or leading. (b) Determine the real and reactive power absorbed by the load. (c) Calculate the peak magnetic energy Wint stored in the inductor by using the expression Wint=L(Irms)2 and check whether the reactive power Q=Wint is satisfied. (Note: The instantaneous magnetic energy storage fluctuates between zero and the peak energy. This energy must be sent twice each cycle to the load from the source by means of reactive power flows.)
7- In order to improve the power factor of equipment operating at lagging power factor, a capacitor is connected _______________. a. Series and parallel b. In series with the equipment c. In series-parallel with the equipment d. In parallel with the equipment
For the maximum average power transfer in the circuit shown in Figure 2, use the impedance ??.and ??Find the value of the maximum average power transferred to ? (Can you write the steps in detail in sentences?)
Find the apparent power and the real powerdelivered to the load in the Y-Δ circuit shown in FigureP7.74. What is the power factor? Assume rms values
Which termination would result to a phase change of 180 degrees at the load if Zo = 100 ohm? a. 50 ohm b. short circuit c. 75 ohm d. all of these What is the purpose of impedance matching? a. maximum return loss b. maximum SWR c. maximum load power d. maximum reflection A short piece of transmission line that may be open or shorted and used for impedance matching purposes. a. converter b. decoder c. stub d. transformer
For the circuit shown in Figure 7.4, determine apparent power S, real power P, reactive power Qand power factor PF. Also, draw the power triangle. The source is 120 volts.

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