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 40P
Find the total watts, volt-amperes reactive, volt-amperes, and Fp of the three-phase system in
Problem 29.
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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.
Three identical coils, each having a resistance of 20Ω and a reactance of 20 Ω are connected in (a)star (b)delta across 440 v ,three phase line. Calculate for each method of connection the line current, power consumed by each phase impedance and readings on each of the two wattmeters to measure the power.
Three 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 current
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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- In the balanced three-phase circuit shown, the current coil of the wattmeter is connected in line aA, and the potential coil of the wattmeter is connected across lines b and c. Show that the wattmeter reading multiplied by 3 equals the total reactive power associated with the load. The phase sequence is positive.arrow_forwardering questions and answers /... Question: Two wattmeters in a 3 phase, 3-wire system with a effective line voltage of 120V read 1500W and 500w then inpedence in a balanced delta connectionarrow_forward28. 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_forward
- 31. A 3-phase 3-wire star-connected load consists of a capacitive reactance of 100ohm in the red phase and a resistor of 100ohm in Bo- each of the other phases. The line voltage is 440 V and the phase sequence is RYB. If the power is measured by the 2-wattmeter method,the current coils being connected in the red and yellow leads respectively, determine the reading of each instrument. (-86.5 W, 1.640 W) Answerarrow_forwardThe load connected to a 3-phase supply comprises three similar coils connected in star. The line currents are 22 A and the kVA rating and power input are 25 kVA and 12 kW respectively. (a) Find the line and phase voltage. (b) If the coils are now connected in delta to the same three phase supply, calculate the line current and phase currentarrow_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_forward
- 1. Solve the following problem: A THREE-PHASE CIRCUIT WHERE THE BALANCED DELTA LOAD OF 36 + J54 OHMS IS SUPPLIED BY 8,602 OHMS IMPEDANCE CONDUCTORS WITH A PHASE ANGLE OF 54,462 DEGREES. IF THE GENERATOR VOLTAGE IN PHASE B IS 100 VOLTS ANGLE - 120 DEGREES. CALCULATE: A) THE VOLTAGE BC IN LOAD. B) THE POWERS IN THE CONDUCTORS. C) THE POWER TRIANGLE IN THE LOAD.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 star connected system has impedance as Z= 8+j6 Ω in each phase. It is fed from 400 V, 3Phase AC supply. Find the active and reactive powers. If power measurement is done by two wattmeter method, then calculate the readings of each wattmeter. Also draw the connection diagram (Phasor diagram) for this power measurementarrow_forward
- 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_forwardThree identical impedances of 15Ð60°W are connected in star to a three-phase, three-wire, 240 volt system. The lines between the supply and the load have impedances of 2 + j ohms. Find the voltage magnitude at the load.arrow_forwardA single wattmeter is connected to measure reactive power of a three-phase, three-wire balanced load. The line current is 17 A and the line voltage is 440 V. Calculate the power factor of the load if the reading of the wattmeter is 4488 VAR.arrow_forward
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