ELECTRICITY FOR TRADES
3rd Edition
ISBN: 9780078118630
Author: Petruzella
Publisher: RENT MCG
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Textbook Question
Chapter 6.2, Problem 13RQ
What type of hand protection may be required when making electrical measurements?
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Q1) For the circuit shown, find Req
°
R
www
1 ΚΩ
R₁₂
www
470 Ω
Req
R₁₂
2.2 ΚΩ
R₁
www
330 Ω
ΡΩΣΙΚΩ
Q9) A 3-phase Y-connected load is connected to a 3-phase power supply through a 3-phase transmission
line. Each phase of the load has an impedance of 30 +j 20 2. The Line voltage of the supply is 110 <-30°V.
The transmission line impedance per phase is 4+j3 Q.
a) Draw the per phase equivalent circuit of the system.
b) Calculate the load line voltage.
2) Construct a block diagram for finding the result of the following addition
labeling each input and output stage
A=101010
B=110011
Chapter 6 Solutions
ELECTRICITY FOR TRADES
Ch. 6.1 - Explain how measurements are made using an analog...Ch. 6.1 - Prob. 2RQCh. 6.1 - Name the three basic metering functions that can...Ch. 6.1 - What is the purpose of the multimeter function...Ch. 6.1 - What is the purpose of the multimeter range...Ch. 6.1 - An analog voltmeter uses a single scale calibrated...Ch. 6.1 - Unlike analog multimeters, digital multimeters...Ch. 6.1 - Prob. 8RQCh. 6.1 - How are voltmeters connected relative to the...Ch. 6.1 - Digital voltmeters have little or no loading...
Ch. 6.1 - A digital multimeter is used to measure a DC...Ch. 6.1 - Define voltage drop.Ch. 6.1 - How are ground-referenced voltage measurements...Ch. 6.1 - State one advantage and one limitation of a...Ch. 6.1 - A noncontact voltage detector is to be used to...Ch. 6.1 - When measuring voltages and currents of unknown...Ch. 6.1 - How must ammeters be connected relative to the...Ch. 6.1 - Ammeters are required to have very low resistance...Ch. 6.1 - What is the advantage of taking a current reading...Ch. 6.1 - Explain how a clamp-on ammeter measures current...Ch. 6.1 - While attempting a voltage measurement across a...Ch. 6.1 - A clamp-on ammeter is to be used to determine the...Ch. 6.2 - What four basic components make up the internal...Ch. 6.2 - How is the pointer of an analog-type ohmmeter set...Ch. 6.2 - Series analog ohmmeters have nonlinear scales....Ch. 6.2 - What does a resistance reading of OL on a digital...Ch. 6.2 - A multimeter set to measure resistance is...Ch. 6.2 - When doing in-circuit component resistance...Ch. 6.2 - Explain the purpose of the multimeter continuity...Ch. 6.2 - An ohmmeter is connected across the two leads of a...Ch. 6.2 - Convert each of the following digital multimeter...Ch. 6.2 - Give an example of what might cause the occurrence...Ch. 6.2 - What energy-level category of multimeter is...Ch. 6.2 - A simple resistance measurement is made to test...Ch. 6.2 - What type of hand protection may be required when...Ch. 6.2 - Compare the input impedance of analog and digital...Ch. 6.2 - Define meter accuracy.Ch. 6.2 - Define meter resolution.Ch. 6.2 - What protection is afforded by the fuse connected...Ch. 6.2 - Prob. 18RQCh. 6.2 - The diode test function of a DMM is to be used to...Ch. 6.2 - Under what condition will true RMS and averaging...
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- Q1) For the circuit shown, find Req ° R www 1 ΚΩ R₁₂ www 470 Ω Req R₁₂ 2.2 ΚΩ R₁ www 330 Ω ΡΩΣΙΚΩarrow_forwardQ3) Consider the following 230 V TNC network a) Is the RCD allowed to be used as protection device for this network? Why? b) Assume that the total RPEN = 22 and (each section RPEN1=RPEN2=RPEN3=RPEN4= 0,5 2). Find VFI, VF2, VF3 and VF4- c) Find whether a 20A gG fuse is a correct protection device for the network. d) Find whether a B32 A circuit breaker is a correct protection device for this network. RPENY M RPEN 3 M RPENZ PE REENA MM ML IVF3 VF2 Notice: The faults don't occure at the Same time, but Single.arrow_forwardThe current in the circuit of Figure is 1 mA. For this amount of current, what must the source voltage be? 1.5 ΚΩ I = 1 mA WW+ 1.2 ΚΩ WW+ 5.6 ΚΩ 1.2 ΚΩarrow_forward
- Q2) What is the total capacitance in Figure? What is the voltage across each capacitor? Vs C₂ 5V 330 pF 220 pFarrow_forwardQ2) In the following 220 V TT circuit: a) Find the fault voltage VF b) Find whether a RCD with IAn = 30 mA is a correct protection device for the network. c) Find whether a 20 A gG fuse is a correct protection device for this network. RB 242 L1 N Чл 21-22 R Aarrow_forwardQ1) Consider the following 220 V/50 Hz TN-C network with an isolation fault at Ll. RB1 2-2 RL₁ =RPEN =0,52 LI A PEN B a) Calculate the fault voltage VF b) Now assume that RB2= RB1 is connected between the points A and B. Calculate now the new fault voltage. c) Assume that the device is protected by 35 A gG fuse. In case a) (No RB2): When is the earliest tripping time of the fuse. When is the sure tripping time of the fuse. d) Find whether a B32 circuit breaker is an allowed protection device for this network or not. e) Find whether a C32 circuit breaker is an allowed protection device for this network or not.arrow_forward
- 2) Using the Figure below, write the equation of the encoder Dy- D₂- D Do Xarrow_forwardHow much voltage will be measured across the resistor in Figure 5 mA RC 560 warrow_forwardwhy is it called a wound rotor? can you draw other types or explian the differences between them? eeeee 3-Phase Induction motor(wound rotor) 00000 R Staror Rotor R Rarrow_forward
- What is the benefit of these lights and when do thery work? AC - Supply Trans.1 Pr.1 Pr.2 0-400V $1 3-Phase Auto Transformer 0-1A Sec.1 Lamp Brown ereas 0-2A Trans. 2 Sec. 2 0-14 S₂ 3-Phase resistive loadarrow_forwardSolve this question by drawing the circuit that will give the outputs shown without using artificial intelligence, please.arrow_forwardSlove this question by drawing the circuitsarrow_forward
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