Introductory Circuit Analysis; Laboratory Manual For Introductory Circuit Analysis Format: Kit/package/shrinkwrap
13th Edition
ISBN: 9780134297446
Author: Boylestad, Robert L.
Publisher: Prentice Hall
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Chapter 24, Problem 32P
To determine
The value of total watts, volt-ampere reactive, volt ampere and power factor
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1. A three-phase, four wire, ABC system with an a line voltage of 200 Volt, has three impedances of 25
/45ᴼ in a Delta connection. Determine the line current, true power, reactive power and apparent
power and draw the voltage-current phasor diagram.
A balanced star load with impedances of 6∟45o ohms is connected to a three-phase, four-wire, 208 volt, ABC system. Find the line currents, the neutral current, the power per phase and the total power (S, P, Q).
The input power to a 3-phase load is measured as 16kW. If the line voltage and power factor of the load are 418 V and 0.6, then the value of line current is
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Chapter 24 Solutions
Introductory Circuit Analysis; Laboratory Manual For Introductory Circuit Analysis Format: Kit/package/shrinkwrap
Ch. 24 - A balanced V load having a 10 resistance in each...Ch. 24 - Repeat Problem 1 if each phase impedance is...Ch. 24 - Repeat Problem 1 if each phase impedance is...Ch. 24 - The phase sequence for the Y-Y system in Fig....Ch. 24 - Repeat Problem 4 if each phase impedance are...Ch. 24 - Repeat Problem 4 if each phase impedance is...Ch. 24 - For the system in Fig. 24.43, find the magnitude...Ch. 24 - Computer the magnitude of the voltage EAB for the...Ch. 24 - For the Y-Y system in Fig. 24.45: a. Find the...Ch. 24 - For the Y-Y system of Fig. 24.46 the impedance of...
Ch. 24 - A balanced load having a 20 resistance in each...Ch. 24 - Repeat Problem 11 if each phase impedance is...Ch. 24 - Repeat Problem 11 if each phase impedance is...Ch. 24 - The phase sequence for the Y- system in Fig....Ch. 24 - Repeat Problem 14 if each phase impedance is...Ch. 24 - Repeat Problem 14 if each phase impedance are...Ch. 24 - Prob. 17PCh. 24 - For the connected load in Fig. 24.49: a. Find the...Ch. 24 - A balanced V load having a 30 resistance in each...Ch. 24 - Repeat Problem 19 if each phase impedance is...Ch. 24 - Prob. 21PCh. 24 - Prob. 22PCh. 24 - Prob. 23PCh. 24 - Repeat Problem 22 if each phase impedance is...Ch. 24 - Prob. 25PCh. 24 - Prob. 26PCh. 24 - Prob. 27PCh. 24 - The phase sequence for the - system in Fig....Ch. 24 - Repeat Problem 28 if each phase impedance is...Ch. 24 - Repeat Problem 28 if each phase impedance is...Ch. 24 - Prob. 31PCh. 24 - Prob. 32PCh. 24 - Prob. 33PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Prob. 35PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Prob. 38PCh. 24 - Prob. 39PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - A balanced, three-phase, -connected load has a...Ch. 24 - A balanced, three-phase, Y-connected load has a...Ch. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - The Y-Y system in Fig. 24.53 has a balanced load...Ch. 24 - Prob. 45PCh. 24 - Prob. 46PCh. 24 - Repeat Problem 46 for the network in Fig. 24.47.Ch. 24 - For the three-wire system in Fig. 24.55, properly...Ch. 24 - Sketch three different ways that two wattmeters...Ch. 24 - For the Y- system in Fig. 24.56: Determine the...Ch. 24 - For the system in Fig. 24.57: Calculate the...Ch. 24 - For the three-phase, three-wire system in Fig....
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- The c-phase voltage of a balanced three-phase Y-connected system is 450 −25° V. If the phase sequence is negative, what is the value of VAB?arrow_forwardTwo wattmeters are used to measure the total power drawn by a balaced delta connected load. If the wattmeters read 1200 W and 800 W respectively, and the line to line voltage is 208 V, solve for the impedance per phase of the load.arrow_forwardIn a 3-phase star connected system, prove that VL =square root of 3 Vph , by considering the line voltage (VBR = VB - VR ) with the help of necessary phasor diagram.arrow_forward
- 28. The impedances are mesh-connected to a symmetrical three-phase, 40-V, 50, Hz supply of phase sequence RYB. Z1=(5+j10)ohm is connected between lines R and Y Z2=(5+j5)ohm is connected between lines Y and B Z3= (6+j4)ohm is connected between lines 8 and R. Two wattmeters connected to measure input have their current coils in lines R and Y respectively. Calculate the line currents and the wattmeter readings. (195.5 A, 79.4 A, 43.4 A; 39.8 kW, 9.6 kW] Answers.arrow_forwardTwo wattmeters are connected to a 3 phase, 3 wire positive sequence system with a 100 Voutput supplies a balanced delta connected load with impedance of 20 cis 40°. Calculate the: (a) Phase and Line currents(b) Readings of the two Wattmeter(c) Draw the Phasor diagram of the currentsarrow_forwarda 400-v, 50hz, 3-phase supply has 100 ohms connected between lines A & B, 318 mH connected between lines B and C and 31.8uF connected between lines C and A. Find the current in line C, assume a phase sequence ABC.arrow_forward
- A balanced Y - connected load having a 25 Ω resistance in each leg is connected to a three -phase , four wires, Y-connected ABC sequence AC generator, if the line volatge EAB=, calculate 1. The phase voltages of the generator 2. The phase voltages of the load 3. The phase currents of the load 4. The line currentsarrow_forwardThree loads, each with resistance 40Ω , are star connected to a 363.73V , 3-phase supply. a) Determine the phase voltage of the system b) Determine the phase current c) Determine the line currentarrow_forwardA balanced 3-phase load draws 120 amperes line current at 230 volts line to line, 0.848 pf lagging current. Solve for the real power.arrow_forward
- A 400V three-phase, four wire system has the following loads connected: Phase 3: load impedance Z3 = 15 – j20 Ω Draw the circuit diagram and determine: The line and phase voltages for phase 3 (including phase angles) The line and phase currents for for phase 3 (including phase angles) The neutral current (including phase angle)arrow_forwardObtain the readings of two wattmeter’s in a three-phase, three-wire system having effective line voltage of 240 V. The load is a balanced delta connected load impedance of 20 cis 80° ohms.arrow_forwardA balanced delta-connected load has phase impedances of 4+j3 Ohms. It is connected to balanced transmission lines, with Vab = 1.5kV @ 15 degrees. a) What is the current through each of the load phases? b) What is the current through each of the transmission lines? c) Which ACSR cable should be used for these transmission lines to give a 20% current rating margin for this load?arrow_forward
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