Electrical Wiring Residential
18th Edition
ISBN: 9781285170954
Author: Ray C. Mullin, Phil Simmons
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 28, Problem 16R
While working on the main panelboard that is energized, the electrician inadvertently causes a direct short circuit (line to ground) on one of the branch-circuit breakers. The available fault current at the main service equipment is rather high. The panelboard is labelled “Series-Connected.” The main breaker is rated 100 amperes. Both branch-circuit breaker and main breaker trip OFF. This condition is referred to as being (selective) (nonselective). (Circle the correct answer.)
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Q4.
a) A purely derivative controller (i.e. with a zero at the origin only) is defined
by an improper transfer function. Considering its asymptotic behaviour,
explain why a purely derivative controller is difficult to implement in
practice. Relate your explanation to the potential limitations on system
performance.
b) Discuss the potential issues faced by a control system with a large cut-off
frequency. Relate your discussion to the implications on system
performance.
c)
The transfer function of a lag compensator is given by
2
KPID(S) = 2.2++0.2s
S
By using the asymptotic approximation technique:
(i) Obtain the standard form and corner frequency for each individual
component of KPID(S).
(ii) Clearly describe the asymptotic behaviour of each individual
component of KPID(S).
Module Code: EN2058
Q1. a) List the advantages and disadvantages of a closed loop system compared to
an open loop system.
b)
c)
What is the procedure for designing a control system for a bread toaster?
An RC circuit is given in Figure Q1. vi(t) and v(t) are the input and output
voltages.
(i) Derive the transfer function of the circuit.
(ii) With a unit step change vi(t) applied to the circuit, derive and sketch the
time response of the circuit.
R1 R2
v₁(t)
R3 C1
vo(t)
R₁ =R2 = 10 k
R3 = 100 kn C₁ = 100 μF
Figure Q1. RC circuit.
(iii) Assuming zero initial conditions, obtain the impulse and ramp responses
of the circuit from the step response derived in (ii). Sketching is not
needed.
Q3.
a)
The frequency response method enables the study of the steady-state
response of a system G(s). What type of inputs are used for frequency
response? If the system is linear and stable, how does the output differ
from the input? Compare the main characteristics of two types frequency
response plots.
b) Consider the control system shown in Figure Q3.
Controller
E(s)
R(s)
Desired
output
C(s)
Plant
G(s)
Y(s)
Actual
output
3(s + 3)
C(s) = k
G(s) =
= s(s - 1)(s + 10)
Figure Q3. Closed-loop system.
(i) Considering definitions in the study of bounded-input bounded-output
stability, is G(s) stable? Classify the poles and zeros of G(s).
(ii) G(s) defined in Figure Q3 is a system completely characterised by
its transfer function. Explain why this is the case.
(iii) Obtain the closed-loop transfer function P(s) = Y(s)/R(s) of the
system.
(iv) Based on your result for the previous question [Question 3b)-(iii)], use
the Routh-Hurwitz stability criterion to determine suitable values of
gain K…
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)...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Please, I want the solution in two ways: Method 1 (without the Smith chart): Method 2 (using the Smith chart): A short circuit stub of length 0.04λ is used to match a 50 Ω lossless line to a load ZL = RL + j30 Ω. Use Smith chart to find:(a) The distance between the stub and the load.(b) The value of RL .arrow_forwardTHE FIRST PAGE OF THIS QUESTION SECTION BELOW IS THE FIRST IMAGE UPLOADED, WHICH SHOWS A digital synchronous sequential circuit and then comes the questions below:1B) Suppose the flip-flops are 74F74 devices and the AND gates are 74F08 devices. Let maxtpd,D=9ns, maxtsu,D=3ns, and maxtpd,AND=6ns. What is the maximum clock frequency at which the circuit can operate reliably? 2) Compare serial transmission and parallel transmission and discuss their advantages and disadvantages. 3) Explain briefly how the slave can protect itself from being overwhelmed by the master in I2 4) A hypothetical logic family has the following specifications. VOH=4.6V VIH=4.0V VOL=0.5V VIL=1.0V IOH=-1mA IIH=50μA IOL=8mA IIL=-0.6mA (4a) What are the noise margins? (4b) What is the fan-out capability?…arrow_forwardTHE FIRST PAGE OF THIS QUESTION SECTION BELOW IS THE FIRST IMAGE UPLOADED, WHICH SHOWS A digital synchronous sequential circuit and then comes the questions below:1B) Suppose the flip-flops are 74F74 devices and the AND gates are 74F08 devices. Let maxtpd,D=9ns, maxtsu,D=3ns, and maxtpd,AND=6ns. What is the maximum clock frequency at which the circuit can operate reliably? 2) Compare serial transmission and parallel transmission and discuss their advantages and disadvantages. 3) Explain briefly how the slave can protect itself from being overwhelmed by the master in I2 4) A hypothetical logic family has the following specifications. VOH=4.6V VIH=4.0V VOL=0.5V VIL=1.0V IOH=-1mA IIH=50μA IOL=8mA IIL=-0.6mA (4a) What are the noise margins? (4b) What is the fan-out capability?…arrow_forward
- I need help on this question a) Find y(t) =yh(t) +yp(t) in time domainIs the system over-damped, under-damped, or critical?arrow_forwardGiven f(t)=a sin(ßt) a = 10 & ß = 23 Find the Laplace Transform using the definition F(s) = ∫f(t)e-stdtarrow_forward= Calculate Avf, Zif, and Zof for the amplifier circuit,Assume he = 50, hie 1.1k2, and identical transistors? 150kQ Vs 5002 HH +25v 10k +6 · 47ΚΩ 47k2 4.7k0} 33 ΚΩ 4.7ΚΩ 10k w 4.7kQ HH Voarrow_forward
- For the four-pole filter in Fig. (2), determine the capacitance values required to produce a critical frequency of 2680 Hz if all the resistors in the RC low-pass circuits are 1.8 K. Also select values for the feedback resistors to get a Butterworth response. Note: For a Butterworth response, the damping factor must be 1.848 for the first stage and 0.765 for the second stage. (2) Re Res ww " = 11arrow_forwardFor the circuit shown in Fig. 2.20, the transistors are identica' and have the following parameters: hje=50, hie = 1.1K, hr =0, and hoe = 0. Calculate Auf, Rif and Rof. Ans: 45.4; 112 KN; 129N. HH 150k 47k R 25 V 10k 47k 4.7k 5μF 33k 4.7k 50µF 50µF 4.7k 4.7k R₁ Roj R1000arrow_forwardA triangular wave is applied to the input of Fig. (3). Determine what the output should be and sketch its waveform in relation to the input. 10μs. 0 5μs 15 μs 0.001 μF R₁ w 2.2karrow_forward
- A three-phase, 480-V, 60-Hz, 6-pole, Y-connected induction motor has its speed controlled by slip power. The circuit parameters are given: Rs=0.06 ohms, Rr=0.05 ohms, Xs=0.2 ohms, Xr=0.3 ohms and Xm=6 ohms. The turn ratio of the rotor to stator winding is n=0.8. The no-load losses of the motor are equal to 150 W. The rotor and stator cupper losses are equal to 249.21 W. The slip power losses are estimated to 8000W. The load torque is 173.61 N.m. at 700 rpm. The efficiency is equal to: Select one: a. 71.5% b. None of these c. 81.5% d. 91.5% Question 2 Consider a 3-phase, 460-V, 100-hp, 0.88 power factor lagging, 4-pole, 1728 RPM, 60 Hz, Y-connected induction motor. The operating slip is equal to: Select one: a. 0.05 b. 0.01 c. 0.04 d. None of these Question 3 A 3 phase, 10 kW, 1750 rpm, Y- connected 460 V, 60 Hz, 4 poles, Y-connected induction motor has the following parameters: Rs = 0.5 Ohms, Rr = 0.3 Ohms, Xs = 0.9 Ohms, Xr = 0.9 Ohms, Xm = 25 Ohms. The no load…arrow_forwardelectric plants do for hand writingarrow_forwardA lighting load of 600 kW and a motor load of 707 kW at 0.707 p.f lagging are supplied by two alternators running in parallel. One machine supplies 900 kW at 0.9 p.f lagging. Find the load sharing and p.f of second machine?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
EBK ELECTRICAL WIRING RESIDENTIALElectrical EngineeringISBN:9781337516549Author:SimmonsPublisher:CENGAGE LEARNING - CONSIGNMENT
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
EBK ELECTRICAL WIRING RESIDENTIAL
Electrical Engineering
ISBN:9781337516549
Author:Simmons
Publisher:CENGAGE LEARNING - CONSIGNMENT
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning
Fault Analysis in Power Systems part 1a; Author: GeneralPAC: Power System Tutorials;https://www.youtube.com/watch?v=g8itg4MOjok;License: Standard youtube license