I- Purely Inductive Load1. Sketch a three-phase 100VAC RMS phase-voltage, Wye (Y) Connected power supply with aWye (Y) Connected load with purely inductive j3002 per phase.2. Assume the phase-voltage of phase-A at the source side has an angle of zero. Calculate bothmagnitudes and phase-angles for phase voltage, line voltage, phase current, and line currentat the load side. Also, compute load real power, apparent Power, and power factor.Ve V VLine_V l A ILine.V.A. P.F.(lagging or leading)

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Give your background about the AC systems from single phase and three phase systems to their connections including their currents and voltages laws with the suitable diagrams.
In an installation there is a three-phase load of 300 kVA with a power factor of 0.8 behind, in parallel with a three-phase load of 150 kVA with a power factor of 0.6 ahead. A pure reactive element is connected in parallel, and a unity power factor is obtained at the power input. Indicate the reactant of the element, with a positive sign if it is a bank of reactors, or with a negative sign if it is a bank of capacitors. Just put the corresponding sign followed by the numerical value, without units. The numerical value must correspond to the three-phase kVARS. You can use integer values with no decimal places or up to two decimal places
Problem 2 The circuit diagram of a certain load is presented below. Determine the following: a. The power factor of the load. b. If the load is connected across a 400 Vrms source, determine the real and reactive power consumed by the load. c. From (b), determine the value of the capacitor to be placed in parallel with the load in order to improve the power factor of the load to 95% lagging. From (b), A synchronous motor is installed in parallel with the load to correct the pf. The motor is rated 5 hp operating at 60% efficiency. Assuming that the motor is running at rated power. Determine the apparent power and power factor of the motor in order to improve the load's pf to 95% lagging. 202 500 µF HI + VL -20 mH 5Ω >0.5VL m 15 mH
Q2. For the circuit shown below, sketch the current waveforms is and io and determine the Average and RMS for both currents. ot io Vs = 220V a = 220° + ot 1002
A load impedance of (200+j0) ohm is to be matched with a 50 ohm transmission line using a quarter wave transformer. What will be the value of the characteristic impedance of the quarter wave transformer.
A synchronous generator has been synchronized to an infinite grid of 13.8 kV and 60 Hz. The generator prime mover C/C is such that the no-load frequency is 62.5 Hz and the power slope is 1 MW/Hz. The AVR C/C (The reactive power against the terminal voltage C/C) is such that the zero reactive power voltage is 14.6 kV, while the slope is 0.4 MVAR/kV. Calculate: (a) the kVA loading of the generator and its power factor. (b) the settings of the prime mover and AVR such that the generator delivers 3 MW at 0.85 lagging power factor.
4. A 4160V, three phase source, 4-wire supplying an unbalanced three phase load. The unbalanced connected load are: Zan = 150/53.13° ; Zbn = 150-53.13° ; Zen = 1500° Assuming positive sequence and the reference is the line voltage "a", determine: a. the line current "a" b. the line current “b” c. the line current "c". d. the total real power e. the total reactive power f. the total apparent power g. the overall power factor. h. the neutral current.
Describe the concept of three-phase power in electrical systems and its significance in power distribution.
What is the average power in ghe single phase ac circuit with the purely resistive load? It is sinusoidal steady state excitation.
A three-phase transmission line and a telephone line are supported on the same towers a shown in the figure. The power line carries a 60-Hz balanced current of 200-A per phase . the telephone line is located directly below phase b. assuming balanced three-phase currents in the power line, find the voltage per kilometer induced in the telephone line. 3.6 m 3.6 m Dal Da2 Del De 4 m 11.2 m-
In power distribution systems, what is sometimes necessary to install to reduce harmonic frequencies and distortion between the three-phase transformers and distribution panels?

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