EBK ELECTRIC CIRCUITS
10th Edition
ISBN: 8220100801792
Author: Riedel
Publisher: YUZU
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Chapter 11, Problem 28P
a)
To determine
Calculate the line voltage magnitude at the sending end of the line.
b)
To determine
Calculate the percentage of efficiency of the distribution line with respect to average power.
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QUESTION 5 ✓
A 100 kVA, 7200 -480 V 50 Hz single phase transformer has the following parameters all given
in ohms:
RLS = 0.00800 RHS = 1.96 RfеHS = 53.2
XLS = 0.01510 XHS=4.55 XMHS=7800
This transformer is operated in step-down mode and delivers 75% of its rated power to a load that
has a power factor of 0.93 lagging.
a) Draw the equivalent circuit model of the transformer with the equivalent series Z's referred to
the high voltage side (3 Marks)
b) Find the total Zin of the transformer at the high side (3 Marks)
c) Find input Z of the transformer with the load disconnected (3 Marks)
d) Find input voltage at 75% of the load required to maintain the rated load voltage (3 Marks)
e) Find an exciting current with the load disconnected (3 Marks).
60 Marks
2- Sketch the circuits in the Block 1, Block 2
and Black 3, Then show the type of every
circuit
Iov
Vout
Block!
Vouts
20
t
Vout 2
t
lovT
Block 2
-lov
P-50HZ
25
*Vout 3
Block 3-2
2.2V 22V
Chapter 11 Solutions
EBK ELECTRIC CIRCUITS
Ch. 11.3 - The voltage from A to N in a balanced three-phase...Ch. 11.3 - Prob. 2APCh. 11.4 - Prob. 4APCh. 11.4 - Prob. 5APCh. 11.4 - Prob. 6APCh. 11.4 - Prob. 7APCh. 11.5 - Prob. 8APCh. 11.5 - Prob. 9APCh. 11 - Prob. 1PCh. 11 - Prob. 3P
Ch. 11 - Prob. 4PCh. 11 - Repeat Problem 11.4 but assume that the...Ch. 11 - Prob. 6PCh. 11 - Find I0 in the circuit in Fig. P11.7.
Find...Ch. 11 - Find the rms value of Io in the unbalanced...Ch. 11 - The time-domain expressions for three...Ch. 11 - Prob. 10PCh. 11 - The magnitude of the line voltage at the terminals...Ch. 11 - A balanced Δ-connected load has an impedance of...Ch. 11 - A balanced, three-phase circuit is characterized...Ch. 11 - Prob. 15PCh. 11 - In a balanced three-phase system, the source is a...Ch. 11 - Prob. 17PCh. 11 - The impedance Z in the balanced three-phase...Ch. 11 - For the circuit shown in Fig. P11.20, find
the...Ch. 11 - A balanced three-phase Δ-connected source is shown...Ch. 11 - Prob. 22PCh. 11 - Fine the rms magnitude and the phase angle of ICA...Ch. 11 - Prob. 24PCh. 11 - Prob. 25PCh. 11 - The line-to-neutral voltage at the terminals of...Ch. 11 - Prob. 27PCh. 11 - Prob. 28PCh. 11 - Prob. 29PCh. 11 - Calculate the complex power in each phase of the...Ch. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 33PCh. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - Three balanced three-phase loads are connected in...Ch. 11 - Prob. 37PCh. 11 - Prob. 38PCh. 11 - Prob. 40PCh. 11 - Prob. 41PCh. 11 - Prob. 42PCh. 11 - Prob. 43PCh. 11 - Prob. 44PCh. 11 - Prob. 45PCh. 11 - Prob. 46PCh. 11 - Prob. 47PCh. 11 - Prob. 48PCh. 11 - Prob. 49PCh. 11 - Prob. 50PCh. 11 - Prob. 51PCh. 11 - Find the reading of each wattmeter in the circuit...Ch. 11 - Prob. 53PCh. 11 - Prob. 54PCh. 11 - Prob. 55PCh. 11 - Prob. 56PCh. 11 - Prob. 57PCh. 11 - Prob. 58PCh. 11 - Prob. 59PCh. 11 - Assume in Problem 11.59 that when the load drops...
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