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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Textbook Question
Chapter 24, Problem 28P
The phase sequence for the
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 phasor sum is zero around the close loop of the
d. Find the current through each phase impedance in phasor form.
e. Find the magnitude of the line currents.
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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) Answer
A three-phase transmission line has resistance and inductive reactance of 25V and 90V, respectively. With no load at the receiving end, a synchronous compensator there takes a current lagging by 90; the voltage is 145 kV at the sending end and 132 kV at the receiving end. Calculate the value of the current taken by the compensator.
When the load at the receiving end is 50MW, it is found that the line can operate with unchanged voltages at the sending and receiving ends, provided that the compensator takes the same current as before, but now leading by 90. Calculate the reactive power of the load
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
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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