Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
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Textbook Question
Chapter 28, Problem 18R
NEC ______________________________ generally prohibits the connecting of fuses and/or circuit breakers into the grounded circuit conductor.
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A three-phase 20 kV medium-voltage line is 10 km. Resistance is 0.365 2/km and
reactance is 0.363 2/km (inductive). Voltage at the beginning of line is 20.5 kV. At the
end of the line is loading P= 800 kW with power factor 0.95ind. Draw 1-phase equivalent
diagram and calculate load current, line voltage at the end the of line, voltage drop and
power losses of the line.
6. Answer the following questions. Take help from ChatGPT to answer these questions
(if you need). Write the answers briefly using your own words with no more than two
sentences, and make sure you check whether ChatGPT is giving you the appropriate
answers in our context.
A) What is a model in our context?
B) What is an LTI system?
C) What are the three forms of model we have used in the class so far to represent
an LTI system? Among the above three forms, which forms can still be used to
represent a nonlinear system?
5. Consider the following block diagram of a system in the Figure 4.
Y₁(s)
G₁
G2.
R(s)
C(s)
Y₂(s)
G3
G4
Figure 4
The models of the blocks G1, G2, G3 and G4 are represented by a differential
equation, transfer function, state-space form, and impulse response as the
followings.
dy1
G₁:
+2y₁ = 3r(t)
dt
1
G2: G₂(s) =
S+3
G3: x=2x+r,
y2=3x-r
G4: h(t)=8(t) + et 1(t)
Find the simplified expression of the overall transfer function of the system i.e., G(s) =
Note for G3 block, you may need to use the formula H(s) = C (sI - A)-¹ B+ D.
C(s)
R(s)
Chapter 28 Solutions
Electrical Wiring Residential
Ch. 28 - What is the minimum size service for a one-family...Ch. 28 - Prob. 2RCh. 28 - Prob. 3RCh. 28 - Prob. 4RCh. 28 - Prob. 5RCh. 28 - Prob. 6RCh. 28 - Prob. 7RCh. 28 - List the standard sizes of fuses and circuit...Ch. 28 - Prob. 9RCh. 28 - Using the method shown in this unit, what is the...
Ch. 28 - State four possible combinations of service...Ch. 28 - Which Code section states that all overcurrent...Ch. 28 - All electrical components have some sort of...Ch. 28 - Arc-fault damage is closely related to the value...Ch. 28 - The utility company has provided a letter to the...Ch. 28 - While working on the main panelboard that is...Ch. 28 - Repeat problem 16 for a main service panel that...Ch. 28 - NEC ______________________________ generally...Ch. 28 - Prob. 19RCh. 28 - Prob. 20RCh. 28 - Overcurrent devices must be accessible. (True)...
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- 4. Simplify the block diagram in Figure 3 and find the closed-loop transfer function G(s) = C(s) R(s) G₁ R(s) Figure 3 C(s) G2 H₁ H₂arrow_forward1. Consider a system defined by the following state-space equations. -5 2 N-MAN-G = 3 -1 y = [12] Find the transfer function H(s) = x1 x2. Y(s) U(s)' + 5arrow_forward3. Simplify the block diagram in Figure 2 and find the closed-loop transfer function G(s) = C(s) R(s)' G₁ C(s) R(s) G2 G3 G4 Figure 2arrow_forward
- Rigid network supplies Feeder 1 through 110/21 kV transformer (Figure 1). Short circuit power of the supplying network is 5000 MVA and voltage is 110 kV. Determine 3-phase short circuit current for the point A. Draw 1-phase equivalent diagram. How big is the current if the 3-phase short circuit occurs in the Busbar? 110/21 kV Busbar Supplying network S = 16MVA 4-10% Figure 1. Feeder 1: 1-5km - r = 0.337 2/km x 0.361 2/km Aarrow_forwardRigid network supplies Feeder 1 through 110/21 kV transformer (Figure 1). Short circuit power of the supplying network is 3000 MVA and voltage is 110 kV. Length of feeder 1 is 5 km. Determine 3-phase short circuit current for the point A. Draw 1-phase equivalent diagram. 110/21 kV Busbar Supplying network S = 16MVA 4-10% Feeder 1: Figure 1. - 1 = 5km r = 0.337 2/km x = 0.361 2/km Aarrow_forwardhelp me to solve this question in detail. thank youarrow_forward
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