EBK INTRODUCTORY CIRCUIT ANALYSIS
13th Edition
ISBN: 9780133923872
Author: Boylestad
Publisher: PEARSON CUSTOM PUB.(CONSIGNMENT)
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Textbook Question
Chapter 24, Problem 14P
The phase sequence for the Y-
a. Find the angles
b. Find the voltage across each phase impedance in phasor form.
c. Draw the phasor diagram of the voltages found in part (b), and show that their sum is zero around the closed loop of the
d. Find the current through each phase impedance in phasor form.
e. Find the magnitude of the line currents.
f. Find the magnitude of the generator phase voltages.
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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.
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) Answer
Q6:
i)
Which of the following is true for a transmission line under load?
Power factor at both the sending and receiving end will be equal
Reactive Power at both the sending and receiving end will be equal.
Active Power at the sending end will be greater than the active power at the receiving end.
Line current in the sending end will be equal to the line current at the receiving end
ii)
A transmission line has 80% efficiency when delivering 500 KW power to a 3-phase load at the receiving end. This implies that ______.
Voltage regulation of the line is 20%
Active power at the receiving side 375 kw/phase
Active power at the sending end is 500 kw/phase
Total power loss in the transmission line is 125 kW
iii)
Which of the following is true for transmission line under no-load?
Power factor at the sending end will be unity
Active Power at the…
Chapter 24 Solutions
EBK INTRODUCTORY CIRCUIT ANALYSIS
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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