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 38P
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.
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.
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Question:
For the three-phase, a three-wire system of Fig. 22.52, find the magnitude of the current through each phase of the load and find the total watts, volt-amperes reactive, volt-amperes, and Fp of the load.
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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- 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_forward1.) A three phase, 3 wire CBA system, with the line voltage Vab =300cis0°,has the following line currents: Ia= 60cis120°, Ib= 62cis-45°,Ic= 15.5cis220° Find the readings of wattmeters in lines a.) A and B b.) B and C C.) A and Carrow_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
- 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_forward1. a) Find the reading of each wattmeter in the circuit shown if ZA=20 30° Ω, ZB=60 0° Ω, and ZC=40 −30° Ω. 2. b) Show that the sum of the wattmeter readings equals the total average power delivered to the unbalanced three-phase load.arrow_forward1. 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_forward
- 26. An unbalanced star-connected load is supplied from a symmetrical 400-V, three-phase, three-wire system. The impedances are: (1+J2)ohm between line R and neutral point of load: (2+j3)ohm between line Y and neutral point of load: (3-j3)ohm, between line B and neutral point of load. Calculate the current in line. B. Phase sequence RYB. [35.5 A] Answerarrow_forwardA 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).arrow_forwardThree 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.arrow_forward
- ering 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_forwardThe 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_forwardA three phase balanced load having a power factor of 0.52 lagging draws a line current of 25A at 220V. If the two watt-meter method is used to measure the total power consumed, determine the reading of each wattmeter.arrow_forward
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