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Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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![Consider the system shown in Figure 1. Assume the load voltage (VL) is 4720 V and the load consumption
is 80 kVA at 0.85 lagging power factor. The line impedance (Zline) is 4.6+j8.5 2. The parameters of the
14,400/4800-V single-phase transformer referred to the secondary are:
Req=0.95 , Xeq = 1.74 , Re = 48.5 kn, and Xm = 31.1 k.
vp
avs
4.6 +19.52
Zline
Vs ~
P
a:1
ele
rmis
alf
Reais
leee
V₂
zí
S
Figure 1: System for Q1
I wad
a) Find the current of the load.
b) Find the primary and secondary voltages of the ideal transformer.
nuomo I un cucc
+ Bline
Xeq,s
1
V₂²
95,
74-32
1.
VL 4720
Ponerlosture
-> Pont
IL
= V₂ -V₂
Zine](https://content.bartleby.com/qna-images/question/f82ce977-5ef0-48ad-bbc6-4a75120837af/4fc6f66b-fc06-4572-91c2-76b66a18da32/58itjdr_thumbnail.png)
Transcribed Image Text:Consider the system shown in Figure 1. Assume the load voltage (VL) is 4720 V and the load consumption
is 80 kVA at 0.85 lagging power factor. The line impedance (Zline) is 4.6+j8.5 2. The parameters of the
14,400/4800-V single-phase transformer referred to the secondary are:
Req=0.95 , Xeq = 1.74 , Re = 48.5 kn, and Xm = 31.1 k.
vp
avs
4.6 +19.52
Zline
Vs ~
P
a:1
ele
rmis
alf
Reais
leee
V₂
zí
S
Figure 1: System for Q1
I wad
a) Find the current of the load.
b) Find the primary and secondary voltages of the ideal transformer.
nuomo I un cucc
+ Bline
Xeq,s
1
V₂²
95,
74-32
1.
VL 4720
Ponerlosture
-> Pont
IL
= V₂ -V₂
Zine
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- 2. Given three identical ideal single-phase transformers with each rated at 100KVA and 7kV/3.5kV, they are connected as a three-phase transformer bank. The three-phase transformer has high voltage side connected in delta and the low voltage side is connected in wye. A three-phase 200KVA, wye connected load is connected at the low voltage side of the transformer. Calculate the following: a. Rated line-to-line voltage on each side b. Line current on each side of the transformerarrow_forwardA short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary). The turn ratio of the step-up transformer is 1:10 and a no-load primary voltage of 13.2 (line-to-line) kV. The step-down transformer has a turn ratio of 15:1 and it has a Y-connected, balanced load of 0.667 +j 0.111 ohms connected to its secondary side. A capacitor bank of -j0.239 ohms is added parallel to the load. Assuming an ideal transmission line, the load voltage (line-to-neutral) would be: A. 5118 V B. 6.2 kV C. 8865 V D. None of the other choices are correct E. 4225 Varrow_forward
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