Chapter Objectives: Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
|
|
- Dora Dalton
- 5 years ago
- Views:
Transcription
1 Chapter 12 Three Phase Circuits Chapter Objectives: Be familiar with different three-phase configurations and how to analyze them. Know the difference between balanced and unbalanced circuits Learn about power in a balanced three-phase system Know how to analyze unbalanced three-phase systems Be able to use PSpice to analyze three-phase circuits Apply what is learnt to three-phase measurement and residential wiring Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
2 Three phase Circuits An AC generator designed to develop a single sinusoidal voltage for each rotation of the shaft (rotor) is referred to as a single-phase AC generator. If the number of coils on the rotor is increased in a specified manner, the result is a Polyphase AC generator, which develops more than one AC phase voltage per rotation of the rotor In general, three-phase systems are preferred over single-phase systems for the transmission of power for many reasons. 1. Thinner conductors can be used to transmit the same kva at the same voltage, which reduces the amount of copper required (typically about 25% less). 2. The lighter lines are easier to install, and the supporting structures can be less massive and farther apart. 3. Three-phase equipment and motors have preferred running and starting characteristics compared to single-phase systems because of a more even flow of power to the transducer than can be delivered with a single-phase supply. 4. In general, most larger motors are three phase because they are essentially selfstarting and do not require a special design or additional starting circuitry.
3 Single Phase, Three phase Circuits a) Single phase systems two-wire type b) Single phase systems three-wire type. Allows connection to both 120 V and 240 V. Two-phase three-wire system. The AC sources operate at different phases.
4 Three-phase Generator The three-phase generator has three induction coils placed 120 apart on the stator. The three coils have an equal number of turns, the voltage induced across each coil will have the same peak value, shape and frequency. Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
5 Balanced Three-phase Voltages Three-phase four-wire system A Three-phase Generator Neutral Wire Voltages having 120 phase difference
6 Balanced Three phase Voltages Neutral Wire a) Wye Connected Source b) Delta Connected Source V an V p 0 V an V p 0 V bn V 120 p V bn V 120 p V cn V 240 p V cn V 240 p a) abc or positive sequence b) acb or negative sequence
7 Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
8 Balanced Three phase Loads A Balanced load has equal impedances on all the phases a) Wye-connected load b) Delta-connected load Balanced Impedance Conversion: Conversion of Delta circuit to Wye or Wye to Delta. Z Z Z Z Y Z Z Z Z a b c Z 3Z Z Y Y 1 Z 3
9 Three phase Connections Both the three phase source and the three phase load can be connected either Wye or DELTA. We have 4 possible connection types. Y-Y connection Y-Δ connection Δ-Δ connection Δ-Y connection Balanced Δ connected load is more common. Y connected sources are more common. Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
10 Balanced Wye-wye Connection A balanced Y-Y system, showing the source, line and load impedances. Source Impedance Line Impedance Load Impedance Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
11 Balanced Wye-wye Connection Line current I n add up to zero. Neutral current is zero: I n = -(I a + I b + I c )= 0 Phase voltages are: V an, V bn and V cn. The three conductors connected from a to A, b to B and c to C are called LINES. The voltage from one line to another is called a LINE voltage Line voltages are: V ab, V bc and V ca Magnitude of line voltages is 3 times the magnitude of phase voltages. V L = 3 V p Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
12 Balanced Wye-wye Connection Line current I n add up to zero. Neutral current is zero: I n = -(I a + I b + I c )= 0 Magnitude of line voltages is 3 times the magnitude of phase voltages. V L = 3 V p V V 0, V V 120, V V 120 an p bn p cn p V V V V V ab an nb an bn V V V bc bn cn 3V 90 3V 30 V V V V V 3V 210 ca cn an p an bn p p
13 Balanced Wye-wye Connection Phasor diagram of phase and line voltages V V V V L ab bc ca = 3 V 3 V 3 V = 3V an bn cn p V V V V p an bn cn
14 Single Phase Equivalent of Balanced Y-Y Connection Balanced three phase circuits can be analyzed on per phase basis.. We look at one phase, say phase a and analyze the single phase equivalent circuit. Because the circuıit is balanced, we can easily obtain other phase values using their phase relationships. I a V Z an Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university Y
15
16 Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
17
18 Balanced Wye-delta Connection Three phase sources are usually Wye connected and three phase loads are Delta connected. There is no neutral connection for the Y- system. Line currents are obtained from the phase currents I AB, I BC and I CA I I I I a AB CA I I I I I b BC AB I I ICA 3 30 I 3I c CA BC AB BC I I I AB BC CA I I I I L a b c I I I I V Z AB V Z V Z p AB BC CA L p BC CA
19 Balanced Wye-delta Connection Phasor diagram of phase and line currents I I I I L a b c I I I I p AB BC CA I L 3I p Single phase equivalent circuit of the balanced Wye-delta connection Z 3
20 Balanced Delta-delta Connection Both the source and load are Delta connected and balanced. VAB VBC V I AB, IBC, ICA Z Z Z I I I, I I I, I I I a AB CA b BC AB c CA BC CA Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
21 Balanced Delta-wye Connection Transforming a Delta connected source to an equivalent Wye connection Single phase equivalent of Delta Wye connection V 30 p 3 Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
22
23 Payam zarbakhsh EElE301 Circuit Theory II Department of Electrical and Electronic Engineering Cyprus International university
Chapter 11 Thre r e e e P has a e e C i C rc r u c its t
Chater 11 Three Phase Circuits Three hase Circuits An AC generator designed to develo a single sinusoidal voltage for each rotation of the shaft (rotor) is referred to as a single-hase AC generator. If
More informationChapter 12 Three Phase Circuits. Chapter Objectives:
Chater 12 Three Phase Circuits Chater Objectives: Be familiar with different three-hase configurations and how to analyze them. Know the difference between balanced and unbalanced circuits Learn about
More informationESO 210 Introduction to Electrical Engineering
ESO 210 Introduction to Electrical Engineering Lecture-12 Three Phase AC Circuits Three Phase AC Supply 2 3 In general, three-phase systems are preferred over single-phase systems for the transmission
More informationPolyphase Systems. Dr Gamal Sowilam
Polyphase Systems Dr Gamal Sowilam OBJECTIVES Become familiar with the operation of a three-phase generator and the magnitude and phase relationship connecting the three phase voltages. Be able to calculate
More informationEE 221 CIRCUITS II. Chapter 12 Three-Phase Circuit
EE 221 CRCUTS Chapter 12 Three-Phase Circuit 1 THREE-PHASE CRCUTS CHAPTER 12 12.1 What is a Three-Phase Circuit? 12.2 Balanced Three-Phase oltages 12.3 Balanced Three-Phase Connection 12.4 Power in a Balanced
More informationCHAPTER 11. Balanced Three-Phase Circuits
CHAPTER 11 Balanced Three-Phase Circuits 11.1 Balanced Three-Phase Voltages Three sinusoidal voltages Identical amplitudes and frequencies Out of phase 120 with each other by exactly As the a-phase voltage,
More informationElectric Circuits II Three-Phase Circuits. Dr. Firas Obeidat
Electric Circuits II Three-Phase Circuits Dr. Firas Obeidat 1 Table of Contents 1 Balanced Three-Phase Voltages 2 Balanced Wye-Wye Connection 3 Balanced Wye-Delta Connection 4 Balanced Delta-Delta Connection
More informationEE 221 CIRCUITS II. Chapter 12 Three-Phase Circuit
EE 221 CIRCUITS II Chapter 12 Three-Phase Circuit 1 THREE-PHASE CIRCUITS CHAPTER 12 12.1 What is a Three-Phase Circuit? 12.2 Balanced Three-Phase Voltages 12.3 Balanced Three-Phase Connection 12.4 Power
More informationChapter 13 Magnetically Coupled Circuits. Chapter Objectives:
Chapter 13 Magnetically Coupled Circuits Chapter Objectives: Understand magnetically coupled circuits. Learn the concept of mutual inductance. Be able to determine energy in a coupled circuit. Learn how
More informationStudy Guide for Chapter 11
Study Guide for Chapter 11 Objectives: 1. Know how to analyze a balanced, three-phase Y-Y connected circuit. 2. Know how to analyze a balanced, three-phase Y-Δ connected circuit. 3. Be able to calculate
More informationCHAPTER 2. Basic Concepts, Three-Phase Review, and Per Unit
CHAPTER 2 Basic Concepts, Three-Phase Review, and Per Unit 1 AC power versus DC power DC system: - Power delivered to the load does not fluctuate. - If the transmission line is long power is lost in the
More informationA) For the Y-Y circuit shown in Fig. 1, find the line currents, the line voltages, and the load voltages.
Salman Bin Abdul Aziz University Faculty of Engineering Electrical Engineering department Electric Circuit Analysis (EE 2020) Sheet (2) Three-Phase Circuits < <
More information3-Phase Transformers. Author: Sergey Dubatov. belfuse.com/signal
3-Phase Transformers Author: Sergey Dubatov 2 A transformer is an electrical device which, by electromagnetic induction, transforms power between circuits at the same frequency, usually changing the values
More informationCode No: R Set No. 1
Code No: R05220204 Set No. 1 II B.Tech II Semester Supplimentary Examinations, Aug/Sep 2007 ELECTRICAL MACHINES-II (Electrical & Electronic Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions
More informationRarely used, problems with unbalanced loads.
THREE-PHASE TRANSFORMERS Transformers used in three-phase systems may consist of a bank of three single-phase transformers or a single three-phase transformer which is wound on a common magnetic core.
More informationESO 210 Introduction to Electrical Engineering
ESO 210 Introduction to Electrical Engineering Lecture-14 Three Phase AC Circuits 2 THE -CONNECTED GENERATOR If we rearrange the coils of the generator as shown in Fig. below the system is referred to
More informationUnit 27 Three-Phase Circuits
Unit 27 Three-Phase Circuits Objectives: Discuss the differences between threephase and single-phase voltages. Discuss the characteristics of delta and wye connections. Compute voltage and current values
More informationSpring 2000 EE361: MIDTERM EXAM 1
NAME: STUDENT NUMBER: Spring 2000 EE361: MIDTERM EXAM 1 This exam is open book and closed notes. Assume f=60 hz and use the constant µ o =4π 10-7 wherever necessary. Be sure to show all work clearly. 1.
More informationThree-Phase Induction Motors. By Sintayehu Challa ECEg332:-Electrical Machine I
Three-Phase Induction Motors 1 2 3 Classification of AC Machines 1. According to the type of current Single Phase and Three phase 2. According to Speed Constant Speed, Variable Speed and Adjustable Speed
More information3.1.Introduction. Synchronous Machines
3.1.Introduction Synchronous Machines A synchronous machine is an ac rotating machine whose speed under steady state condition is proportional to the frequency of the current in its armature. The magnetic
More informationTransformers 3: connections
CHAPTER 11 Transformers 3: connections Further reading Objectives On completion of this chapter, you should be able to 1. construct a phasor diagram for a three-phase transformer under load, given its
More informationA Practical Guide to Free Energy Devices
A Practical Guide to Free Energy Devices Part PatD14: Last updated: 25th February 2006 Author: Patrick J. Kelly This patent application shows the details of a device which it is claimed, can produce sufficient
More information6. List two possible arrangements of a Yconnection and give one application
OBJECTIVES PI 26.35-1 Electrical Equipment - Course PI 30.2 THREE PHASE SYSTEMS On completion of this module the student will be able to: 1. In a few sentences explain how three phase voltages are produced
More informationEN Assignment No.1 - TRANSFORMERS
EN-06 - Assignment No.1 - TRANSFORMERS Date : 13 th Jan 01 Q1) A 0kVA 00/0 Volts, 60Hz, single phase transformer is found to have the following equivalent circuit parameter referred to the high potential
More informationChapter 7. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Chapter 7 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Learning Objectives 1. Understand the meaning of instantaneous and average power, master AC power notation,
More informationMILWAUKEE SCHOOL OF ENGINEERING LABORATORY SESSION 4 THREE PHASE TRANSFORMERS
LABORATORY SESSION 4 THREE PHASE TRANSFORMERS PURPOSE To investigate the three phase transformer connections and characteristics DISCUSSION Most electrical energy is generated and transmitted using three
More informationElectrical Theory. Power Principles and Phase Angle. PJM State & Member Training Dept. PJM /22/2018
Electrical Theory Power Principles and Phase Angle PJM State & Member Training Dept. PJM 2018 Objectives At the end of this presentation the learner will be able to: Identify the characteristics of Sine
More informationKINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING QUESTION BANK UNIT I BASIC CIRCUITS ANALYSIS PART A (2-MARKS)
KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING QUESTION BANK YEAR / SEM : I / II SUBJECT CODE & NAME : EE 1151 CIRCUIT THEORY UNIT I BASIC CIRCUITS ANALYSIS PART A (2-MARKS)
More informationEE 340L EXPERIMENT # 3 SYNCHRONOUS GENERATORS
EE 340L EXPERIMENT # 3 SYNCHRONOUS GENERATORS A. EQUIVALENT CIRCUIT PARAMETERS A.1. OPEN CIRCUIT TEST (a) Mechanically couple the generator with a shunt-excited DC motor as shown in figure 4(a). (b) With
More informationPower and Energy Measurements. MYcsvtu Notes
Power and Energy Measurements Contest Power measurements DC circuits AC circuits Three-phase systems High-frequency power measurements Energy measurements DC circuits AC circuits Example: Power and energy
More informationQuestion Paper Profile
I Scheme Question Paper Profile Program Name : Electrical Engineering Program Group Program Code : EE/EP/EU Semester : Third Course Title : Electrical Circuits Max. Marks : 70 Time: 3 Hrs. Instructions:
More informationLevel 6 Graduate Diploma in Engineering Electro techniques
9210-137 Level 6 Graduate Diploma in Engineering Electro techniques Sample Paper You should have the following for this examination one answer book non-programmable calculator pen, pencil, ruler, drawing
More informationCork Institute of Technology. Autumn 2008 Electrical Energy Systems (Time: 3 Hours)
Cork Institute of Technology Bachelor of Science (Honours) in Electrical Power Systems - Award Instructions Answer FIVE questions. (EELPS_8_Y4) Autumn 2008 Electrical Energy Systems (Time: 3 Hours) Examiners:
More information1. Explain in detail the constructional details and working of DC motor.
DHANALAKSHMI SRINIVASAN INSTITUTE OF RESEARCH AND TECHNOLOGY, PERAMBALUR DEPT OF ECE EC6352-ELECTRICAL ENGINEERING AND INSTRUMENTATION UNIT 1 PART B 1. Explain in detail the constructional details and
More informationTopic 6 Quiz, February 2017 Impedance and Fault Current Calculations For Radial Systems TLC ONLY!!!!! DUE DATE FOR TLC- February 14, 2017
Topic 6 Quiz, February 2017 Impedance and Fault Current Calculations For Radial Systems TLC ONLY!!!!! DUE DATE FOR TLC- February 14, 2017 NAME: LOCATION: 1. The primitive self-inductance per foot of length
More informationDISCUSSION OF FUNDAMENTALS
Unit 4 AC s UNIT OBJECTIVE After completing this unit, you will be able to demonstrate and explain the operation of ac induction motors using the Squirrel-Cage module and the Capacitor-Start Motor module.
More informationPower Measurements. Technology Consulting
Technology Consulting William H. Hardy, PhD 6386 Avington Place Gainesville, VA 20155 Cell: (865) 279-1090 www.powermeasurements.com Bill.Hardy@PowerMeasurements Metering US Services The US has the widest
More informationLecture 4 - Three-phase circuits, transformer and transient analysis of RLC circuits. Figure 4.1
Lecture 4 - Three-phase circuits, transformer and transient analysis of RLC circuits Power supply to sizeable power converters are often from three-phase AC source. A balanced three-phase source consists
More informationModule 1. Introduction. Version 2 EE IIT, Kharagpur
Module 1 Introduction Lesson 1 Introducing the Course on Basic Electrical Contents 1 Introducing the course (Lesson-1) 4 Introduction... 4 Module-1 Introduction... 4 Module-2 D.C. circuits.. 4 Module-3
More informationThree Phase Induction Motor Performance under Unbalanced Voltage Conditions
Three Phase Induction Motor Performance under Unbalanced Voltage Conditions A Jalilian, IUST 1. Introduction Three phase induction motors are normally designed to operate under balanced supply voltage
More informationCHAPTER 4. Distribution Transformers
CHAPTER 4 Distribution Transformers Introduction A transformer is an electrical device that transfers energy from one circuit to another purely by magnetic coupling. Relative motion of the parts of the
More informationGenerator Protection GENERATOR CONTROL AND PROTECTION
Generator Protection Generator Protection Introduction Device Numbers Symmetrical Components Fault Current Behavior Generator Grounding Stator Phase Fault (87G) Field Ground Fault (64F) Stator Ground Fault
More information86 chapter 2 Transformers
86 chapter 2 Transformers Wb 1.2x10 3 0 1/60 2/60 3/60 4/60 5/60 6/60 t (sec) 1.2x10 3 FIGURE P2.2 2.3 A single-phase transformer has 800 turns on the primary winding and 400 turns on the secondary winding.
More informationExperiment 45. Three-Phase Circuits. G 1. a. Using your Power Supply and AC Voltmeter connect the circuit shown OBJECTIVE
Experiment 45 Three-Phase Circuits OBJECTIVE To study the relationship between voltage and current in three-phase circuits. To learn how to make delta and wye connections. To calculate the power in three-phase
More informationLECTURE NOTES ON ELECTRICAL MACHINE-II. Subject Code-PCEL4302
LECTURE NOTES ON ELECTRICAL MACHINE-II Subject Code-PCEL4302 For B.Tech 5 th Semester Electrical Engineering MODULE-III SYNERGY INSTITUTE OF ENGINEERING AND TECHNOLOGY Department of Electrical Engineering
More informationINTRODUCTION...xiii Author s Comments...xiii Exam Preparation...xiii Difficult Concepts...xiv Textbook Errors and Corrections...xv Internet...
INTRODUCTION...xiii Author s Comments...xiii Exam Preparation...xiii Difficult Concepts...xiv Textbook Errors and Corrections...xv Internet...xv UNIT 1 ELECTRICIAN S MATH AND BASIC ELECTRICAL FORMULAS...1
More informationThree-Phase, Step-Wave Inverter Circuits
0 Three-Phase, Step-Wave Inverter Circuits 0. SKELETON INVERTER CIRCUIT The form of voltage-source inverter (VSI) most commonly used consists of a three-phase, naturally commutated, controlled rectifier
More informationAC Power Instructor Notes
Chapter 7: AC Power Instructor Notes Chapter 7 surveys important aspects of electric power. Coverage of Chapter 7 can take place immediately following Chapter 4, or as part of a later course on energy
More informationTHE UNIVERSITY OF BRITISH COLUMBIA. Department of Electrical and Computer Engineering. EECE 365: Applied Electronics and Electromechanics
THE UNIVERSITY OF BRITISH COLUMBIA Department of Electrical and Computer Engineering EECE 365: Applied Electronics and Electromechanics Final Exam / Sample-Practice Exam Spring 2008 April 23 Topics Covered:
More informationPower systems 2: Transformation
Power systems 2: Transformation Introduction In this series of articles, we will be looking at each of the main stages of the electrical power system in turn. s you will recall from our Introduction to
More informationR10. III B.Tech. II Semester Supplementary Examinations, January POWER SYSTEM ANALYSIS (Electrical and Electronics Engineering) Time: 3 Hours
Code No: R3 R1 Set No: 1 III B.Tech. II Semester Supplementary Examinations, January -14 POWER SYSTEM ANALYSIS (Electrical and Electronics Engineering) Time: 3 Hours Max Marks: 75 Answer any FIVE Questions
More informationAlternating current. Interesting Fact: Current and voltage
Alternating current Most students learning about electricity begin with what is known as direct current (DC), which is electricity flowing in one direction only. DC is the kind of electricity made by a
More informationThermal Imaging, Power Quality and Harmonics
Thermal Imaging, Power Quality and Harmonics Authors: Matthew A. Taylor and Paul C. Bessey of AVO Training Institute Executive Summary Infrared (IR) thermal imaging (thermography) is an effective troubleshooting
More informationSample Question Paper
Scheme G Sample Question Paper Course Name : Electrical Engineering Group Course Code : EE/EP Semester : Third Subject Title : Electrical Circuit and Network 17323 Marks : 100 Time: 3 hrs Instructions:
More informationCOMPUTER AIDED ELECTRICAL DRAWING (CAED) 10EE65
COMPUTER AIDED ELECTRICAL DRAWING (CAED) 0EE65 Winding Diagrams: (i) DC Winding diagrams (ii) AC Winding Diagrams Terminologies used in winding diagrams: Conductor: An individual piece of wire placed in
More informationContents. Core information about Unit
1 Contents Core information about Unit UEENEEH114A - Troubleshoot resonance circuits......3 UEENEEG102A Solve problems in low voltage AC circuits...5 TextBook...7 Topics and material Week 1...9 2 Core
More information3. What is hysteresis loss? Also mention a method to minimize the loss. (N-11, N-12)
DHANALAKSHMI COLLEGE OF ENGINEERING, CHENNAI DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING EE 6401 ELECTRICAL MACHINES I UNIT I : MAGNETIC CIRCUITS AND MAGNETIC MATERIALS Part A (2 Marks) 1. List
More informationElectric Power Systems 2: Generators, Three-phase Power, and Power Electronics
15-830 Electric Power Systems 2: Generators, Three-phase Power, and Power Electronics J. Zico Kolter October 9, 2012 1 Generators Basic AC Generator Rotating Magnet Loop of Wire 2 Generator operation Voltage
More informationPESIT Bangalore South Campus Hosur road, 1km before Electronic City, Bengaluru -100 Department of Electronics & Communication Engineering
INTERNAL ASSESSMENT TEST 3 Date : 15/11/16 Marks: 0 Subject & Code: BASIC ELECTRICAL ENGINEERING -15ELE15 Sec : F,G,H,I,J,K Name of faculty : Mrs.Hema, Mrs.Dhanashree, Mr Nagendra, Mr.Prashanth Time :
More information~=E.i!=h. Pre-certification Transformers
7 Transformers Section 26 of the electrical code governs the use and installations of transformers. A transformer is a static device used to transfer energy from one alternating current circuit to another.
More informationVOLTAGE AND CURRENT RELATIONS AND POWER PART1: THREE PHASE VOLTAGE AND CURRENT RELATIONSHIPS
Islamic University of Gaza Faculty of Engineering Electrical Engineering department Electric Machine Lab Eng. Omar A. Qarmout Eng. Amani S. Abu Reyala Experiment 2 THREE PHASE AC CIRCUITS: VOLTAGE AND
More informationPower Quality Monitoring and Power Metering Tutorial
Power Quality Monitoring and Power Metering Tutorial Power generation and transmission today are accomplished using three phase alternatingcurrent. To understand electrical power quality monitoring and
More informationAligarh College of Engineering & Technology (College Code: 109) Affiliated to UPTU, Approved by AICTE Electrical Engg.
Aligarh College of Engineering & Technology (College Code: 19) Electrical Engg. (EE-11/21) Unit-I DC Network Theory 1. Distinguish the following terms: (a) Active and passive elements (b) Linearity and
More informationConventional Paper-II-2011 Part-1A
Conventional Paper-II-2011 Part-1A 1(a) (b) (c) (d) (e) (f) (g) (h) The purpose of providing dummy coils in the armature of a DC machine is to: (A) Increase voltage induced (B) Decrease the armature resistance
More informationCHAPTER 6 THREE-LEVEL INVERTER WITH LC FILTER
97 CHAPTER 6 THREE-LEVEL INVERTER WITH LC FILTER 6.1 INTRODUCTION Multi level inverters are proven to be an ideal technique for improving the voltage and current profile to closely match with the sinusoidal
More informationCONSTRUCTION ELECTRICIAN APPRENTICESHIP PROGRAM Line H: Install Electrical Equipment H-2 LEARNING GUIDE H-2 INSTALL TRANSFORMERS
CONSTRUCTION ELECTRICIAN APPRENTICESHIP PROGRAM Level 3 Line H: Install Electrical Equipment H-2 LEARNING GUIDE H-2 INSTALL TRANSFORMERS Foreword The Industry Training Authority (ITA) is pleased to release
More informationVoltage Unbalance Effects on Induction Motor Performance
Proceedings of the 6th WSEAS International Conference on Simulation, Modelling and Optimization, Lisbon, Portugal, September -4, 006 11 Voltage Unbalance Effects on Induction Motor Performance L. REFOUFI,
More informationELECTROTECHNOLOGY ELTK1200 ASSIGNMENT #8 SOLUTIONS
ELECTROTECHNOLOGY ELTK1200 ASSIGNMENT #8 SOLUTIONS 1. 2. 3. Full-load: This has not changed. 187 a Full-load Load is a of Full-load, current will be a of Full-load current (voltage is the same). Fe loss
More informationModule 7. Transformer. Version 2 EE IIT, Kharagpur
Module 7 Transformer Lesson 28 Problem solving on Transformers Contents 28 Problem solving on Transformer (Lesson-28) 4 28.1 Introduction. 4 28.2 Problems on 2 winding single phase transformers. 4 28.3
More informationHARMONICS CAUSES AND EFFECTS
HARMONICS CAUSES AND EFFECTS What is Harmonics? Harmonics is defined as the content of the signal whose frequency is an integral multiple of the system frequency of the fundamentals. Harmonics current
More informationSYNCHRONOUS MACHINES
SYNCHRONOUS MACHINES The geometry of a synchronous machine is quite similar to that of the induction machine. The stator core and windings of a three-phase synchronous machine are practically identical
More informationReg. No. : BASIC ELECTRICAL TECHNOLOGY (ELE 101)
Department of Electrical and Electronics Engineering Reg. No. : MNIPL INSTITUTE OF TECHNOLOGY, MNIPL ( Constituent Institute of Manipal University, Manipal) FIRST SEMESTER B.E. DEGREE MKEUP EXMINTION (REVISED
More informationLecture (11) Three Phase Transformers
Lecture (11) Three Phase Transformers 11-1 High Low I = 1000 10 ( ) 4. 16 10 = 18. 8 6. 8 69 / 4.16 Kv The line current in the low voltage 1000 kv 0.8 p.f. lagging 11-2 For different connections, I2 V
More informationUEE11 Electrotechnology. Training Package
UEE11 Electrotechnology Training Package UEENEEJ153A Find and rectify faults in motors and associated controls in refrigeration and air conditioning systems Learner Workbook Version 1 Training and Education
More informationWIND TURBINE CONNECTED TO THE ELECTRICAL NETWORK
Chapter 5 Electrical Network 5 1 WIND TURBINE CONNECTED TO THE ELECTRICAL NETWORK He brings forth the wind from His storehouses. Psalms 135:7 Only a few hardy people in the United States live where 60
More informationNote: 1. All the students must strictly follow all the safety precautions. 2. In case of any question or concern, please contact LAB INSTRUCTOR or TA.
UNIVERSITY OF WATERLOO ELECTRICAL & COMPUTER ENGINEERING DEPARTMENT FALL 2006 E&CE 261: Energy Systems and Components EXPERIMENT 1: THREE-PHASE SYSTEMS Contents covered in this laboratory exercise: 1.
More informationChapter 1 Electrical Theory and Part C Series Parallel and Code Questions Multiwire Branch Circuits Unit 1 Electrician s Math
Chapter 1 Electrical Theory and Code Questions 1 Unit 1 Electrician s Math and Basic Electrical Formulas 3 Part A Electrician s Math 3 1 1 Fractions 3 1 2 Kilo 4 1 3 Knowing Your Answer 4 1 4 Multiplier
More informationMAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION
Important Instructions to examiners: 1. The answers should be examined by key words and not as word-to-word as given in the model answer scheme. 2. The model answer and the answer written by candidate
More informationSpace Vector PWM and Model Predictive Control for Voltage Source Inverter Control
Space Vector PWM and Model Predictive Control for Voltage Source Inverter Control Irtaza M. Syed, Kaamran Raahemifar Abstract In this paper, we present a comparative assessment of Space Vector Pulse Width
More informationR. W. Erickson. Department of Electrical, Computer, and Energy Engineering University of Colorado, Boulder
R. W. Erickson Department of Electrical, Computer, and Energy Engineering University of Colorado, Boulder 16.4. Power phasors in sinusoidal systems Apparent power is the product of the rms voltage and
More informationREV NO EXPERIMENT NO 1 AIM: To perform open and short circuit tests on 1-phase transformer and to calculate efficiency. Apparatus required:
KARNAL INSTITUTE OF TECHNOLOGY & MANAGEMENT KUNJPURA, KARNAL LAB MANUAL OF ------- SUBJECT CODE DATE OF ISSUE: SEMESTER: BRANCH: REV NO EXPERIMENT NO 1 AIM: To perform open and short circuit tests on 1-phase
More informationIn Class Examples (ICE)
In Class Examples (ICE) 1 1. A 3φ 765kV, 60Hz, 300km, completely transposed line has the following positive-sequence impedance and admittance: z = 0.0165 + j0.3306 = 0.3310 87.14 o Ω/km y = j4.67 410-6
More informationCHAPTER 3 EQUIVALENT CIRCUIT AND TWO AXIS MODEL OF DOUBLE WINDING INDUCTION MOTOR
35 CHAPTER 3 EQUIVALENT CIRCUIT AND TWO AXIS MODEL OF DOUBLE WINDING INDUCTION MOTOR 3.1 INTRODUCTION DWIM consists of two windings on the same stator core and a squirrel cage rotor. One set of winding
More informationQUESTION BANK ETE (17331) CM/IF. Chapter1: DC Circuits
QUESTION BANK ETE (17331) CM/IF Chapter1: DC Circuits Q1. State & explain Ohms law. Also explain concept of series & parallel circuit with the help of diagram. 3M Q2. Find the value of resistor in fig.
More informationRelaying 101. by: Tom Ernst GE Grid Solutions
Relaying 101 by: Tom Ernst GE Grid Solutions Thomas.ernst@ge.com Relaying 101 The abridged edition Too Much to Cover Power system theory review Phasor domain representation of sinusoidal waveforms 1-phase
More informationGRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 12
GRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 12 ELECTRICAL TECHNOLOGY EXEMPLAR 2014 MEMORANDUM MARKS: 200 This memorandum consists of 13 pages. Electrical Technology 2 DBE/2014 INSTRUCTIONS TO THE MARKERS
More informationSECTION 4 TRANSFORMERS. Yilu (Ellen) Liu. Associate Professor Electrical Engineering Department Virginia Tech University
SECTION 4 TRANSFORMERS Yilu (Ellen) Liu Associate Professor Electrical Engineering Department Virginia Tech University Analysis of Transformer Turns Ratio......................... 4.2 Analysis of a Step-Up
More informationAN EQUIVALENT CIRCUIT MODEL FOR A THREE PHASE HARMONIC MITIGATING TRANSFORMER
AN EQUIVALENT CIRCUIT MODEL FOR A THREE PHASE HARMONIC MITIGATING TRANSFORMER Riccardo Eric Maggioli A dissertation submitted to the Faculty of Engineering and the Built Environment, University of the
More informationDownloaded from / 1
PURWANCHAL UNIVERSITY II SEMESTER FINAL EXAMINATION-2008 LEVEL : B. E. (Computer/Electronics & Comm.) SUBJECT: BEG123EL, Electrical Engineering-I Full Marks: 80 TIME: 03:00 hrs Pass marks: 32 Candidates
More information5.0 THREE PHASE SYSTEM
5.0 THREE PHASE SYSTEM ET 201 BAKISS HIYANA BAU BAKAR JKE, POLISAS 1 COURSE LEARNING OUTCOME 1. Explain AC circuit concept and their analysis using AC circuit law. 2. Apply the knowledge of AC circuit
More informationElectrical Theory 2 Lessons for Fall Semester:
Electrical Theory 2 Lessons for Fall Semester: Lesson 1 Magnetism Lesson 2 Introduction to AC Theory Lesson 3 Lesson 4 Capacitance and Capacitive Reactance Lesson 5 Impedance and AC Circuits Lesson 6 AC
More information1. (a) Determine the value of Resistance R and current in each branch when the total current taken by the curcuit in figure 1a is 6 Amps.
Code No: 07A3EC01 Set No. 1 II B.Tech I Semester Regular Examinations, November 2008 ELECTRICAL AND ELECTRONICS ENGINEERING ( Common to Civil Engineering, Mechanical Engineering, Mechatronics, Production
More informationLOW-RESISTANCE grounding resistors (LRGs) appear
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 44, NO. 5, SEPTEMBER/OCTOBER 2008 1311 Grounding the Neutral of Electrical Systems Through Low-Resistance Grounding Resistors: An Application Case Massimo
More informationThree phase transformer 1
Three phase transformer 1 Electric Engineering Name Institution: Three phase transformer 2 Table of Contents Operation of transformer under no load... 3 Operation of transformer under load... 4 Circuit
More informationBahram Amin. Induction Motors. Analysis and Torque Control. With 41 Figures and 50 diagrams (simulation plots) Springer
Bahram Amin Induction Motors Analysis and Torque Control With 41 Figures and 50 diagrams (simulation plots) Springer 1 Main Parameters of Induction Motors 1.1 Introduction 1 1.2 Structural Elements of
More informationDownloaded From All JNTU World
Code: 9A02403 GENERATION OF ELECTRIC POWER 1 Discuss the advantages and disadvantages of a nuclear plant as compared to other conventional power plants. 2 Explain about: (a) Solar distillation. (b) Solar
More informationAlternators Reactance for Nonlinear Loads
Alternators Reactance for Nonlinear Loads Allen Windhorn. P.E. 26 July, 2013 Introduction Widespread invocation of IEEE Std 519 on systems powered by generators, together with increased use of equipment
More informationNATIONAL SENIOR CERTIFICATE GRADE 12
NATIONAL SENIOR CERTIFICATE GRADE 12 ELECTRICAL TECHNOLOGY NOVEMBER 2008 MEMORANDUM This memorandum consists of 12 pages. Electrical Technology 2 DoE/November 2008 QUESTION 1: TECHNOLOGY, SOCIETY AND THE
More informationELEN 140 ELECTRICAL CIRCUITS II Winter 2013
ELEN 140 ELECTRICAL CIRCUITS II Winter 2013 Professor: Stephen O Loughlin Prerequisite: ELEN 130 Office: C234B Co-requisite: none Office Ph: (250) 762-5445 ext 4376 Lecture: 3.0 hrs/week Email: soloughlin@okanagan.bc.ca
More informationThe synchronous machine as a component in the electric power system
1 The synchronous machine as a component in the electric power system dφ e = dt 2 lectricity generation The synchronous machine is used to convert the energy from a primary energy resource (such as water,
More information