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Electrical Machines Major Electrical Technology Department

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Kingdom of Saudi Arabia اململكة العربية السعودية General Organization for Technical Education and Vocational Training المؤسسة العامة للتعليم الفني

والتدريب المهني

Colleges of Technologe Directorate

عمادة الشؤون األكادمييةDeanship of Academic Affairs

إدارة شؤون الكليات التقنية

DEPARTMENT OF ELECTRICAL TECHNOLOGY

CURRICULUM

FOR

ELECTRICAL MACHINES

PREPARED BY

DR. ALI OSHEIBA DR. HOCINE DRIDI DR. ABDALLAH BENSELAMA DR. ABDELGHANY ELSAYED DR. AHMED MECHRAOUI

FIRST EDITION ١٤٢٠ H – ٢٠٠٠ G


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Electrical Machines MajorElectrical Technology Department

ELE 205 Code Workshop 2 : Repair and Control of Electrical Machines Course Title

WS-1: Electrical Mechanics and Protection Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

L 6 W T

Contacthr/w

L 90 W T

Contact hr/sem.

Course Description : This practical course deals with the design, cost calculation

and assembly of distribution panels, contactor control circuits and fault finding and repair of electrical machines, gear boxes and braking devices.

General Goal : The student should be able to carry out job planning, cost calculations, assembly and repair in conjunction

with distribution panels, contactor control circuits and electrical machines.

Behavioral Objectives : The student …

performs job planning and makes lists of necessary materials, calculates working time and costs installs, puts into operation and carries out trouble shooting in distribution panels and contactor control circuits carries out maintenance and repair work on electrical motors and drives applies protective measures and safety regulations according to the standards

L = Lecture Hours, W = Workshop/Laboratory Hours, T = Tutorial Hours


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Topics (Theory & Practice) 1. Job planning and cost calculation 2. Distribution panels

Assembling of components Testing components

3. Contactor control circuits for electrical machines Circuit components Open loop control circuits Assembling, testing and fault finding

4. Fault finding and repair of motors, gear boxes and braking devices Electrical motors Gear boxes for electrical motors Braking devices for electrical machines

TOP 2 and 4: Electrical Power Engineering Proficiency Course Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ)

Textbook:

Additional Reading:

References:


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Detailed Curriculum (Practice)

Behavioral Objectives Contents Hrs The student ... - reads technical drawings and circuit documents and applies them - plans the necessary working steps and estimates the required working time

- selects materials, wires and cables according to instructions with the help of

catalogues - draws up a list of tools and materials needed – selects tools and materials for maintenance and repair - draws up a cost estimation and checks it when the work is completed - knows and applies the industrial safety provisions and the trade accident prevention regulations The student ... - applies the regulations and standards for assembling and putting into operation low voltage distributors - names selective criteria for the distribution and applied equipment - assembles distributors of different types for different purposes - selects the type of wiring and connects the components according to the circuit diagram - installs industrial measuring instruments and connects them directly or over a measuring transformer to the source

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The student … - carries out a safety inspection with the help of measuring instruments - installs and connects distributors

1. Job planning and cost calculation

- Circuit diagrams - Documents - Working steps - Time consumption for labour - Wires, cables, etc. - Tool and material list for maintenance and repair - Cost estimation - Industrial safeties - Accident prevention regulations

2. Distribution panels

• Assembling of components - Low voltage distributors - Regulations for assembly - Types of distributors - Circuit connections - Selection of material - Connection of circuit components - Installation of industrial instruments • Testing components - Safety inspection - Installation of distributors -Tests and inspection report

18 W

24 W


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- tests for proper functioning - draws up a report to hand over The student ... describes the construction and functioning of different circuit components such as switches, relays, contactors etc. - states the application of various components and evaluates their characteristics - names components criteria for the selection in open loop control circuits The student … describes with the help of circuit diagrams the functioning of various contactor circuits: - analyses sequential controls, develops the necessary circuits and draws the circuit diagram The student … - assembles the components of the open loop control and connects them according to the circuit diagram - performs a visual inspection of the assembly - carries out safety tests and necessary adjustments for optimal operation with the help of measuring instruments - carries out systematic fault finding and repair with the help of a circuit diagram and measuring instruments - fills out inspection forms and prepares the documentation The student ... - tests rotating electrical machines and determines whether they are repairable - turns and saws commutators and slip-

3. Contactor control circuits for electrical machines

• Circuit components - limit switches, - pressure-operated switches, - temperature relays, - synchro-generators, - float switches - time delay relays - safety-locking contactor - motor protecting switches • Open loop control circuits * On/Off circuit * Reversal circuit * Star-Delta ciruit * Pole.changing circuit, * sequential control circuits • Assembly, tests and faults - Open loop control assembly - Circuit diagrams - Visual inspection - Safety inspection - Optimal operation - Fault finding - Inspection forms - Documents

4. Fault finding and repair of motors and their accessories

• Electrical motors - Repairable check - Repair commutators and slip-rings - Brushes, brush holders

30 W


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rings - exchanges carbon brushes and grinds them to fit - adjusts the brush holder - exchanges the start switch and condensers - checks the completed repair work according to instructions The student ... - checks gears from electrical machines and determines whether they are repairable - dismantles and cleans gears - makes oil changes - exchanges faulty bearings, sealing rings, cog wheels and shafts from gears - assembles gears, seals them and fills them with oil The student ... - distinguishes the difference between braking devices - tests the braking device and its mechanical and electrical parts - adjusts the brakes according to instructions and technical documents - changes brake linings, brake discs, brake drums, brake magnets and parts of clutch

- Starter switch - Condenser - Check of repair work

• Gear boxes for electrical motors

- Repairable check - Oil change - Desassembly - Faulty bearings - Sealing rings - Cog wheels - Shafts from gears - Assembly

• Braking devices for electrical machines

- Braking devices - Adjustment - Brake repair


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Electrical Machines MajorElectrical Technology Department ELE 352 Code Fundamentals of Electric Drives Course Title

AC Machines Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : The course covers the performance of electrical drives,

selection of motor rating, starting, braking, speed control of dc motor, induction motor, and synchronous motor drives. Energy conversion in electrical drives is also covered considering current and future needs of the industry.

General Goal : This course is designed to give students a comprehensive introduction to the classification of drives, theory of operation, performance analysis and applications of different electric drives.

Behavioral Objectives : This course gives the student a deep understanding of various aspects of different electric

drives behavior for general industrial applications.

A graduated student should have the ability to select, operate, and control electric machine drive.


Topics (Theory & Practice) Introduction.

Characteristics of loads.

Characteristics of electric motor drive.

Control of electric motor drives.


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A. Hughes, Electric Motors and Drives Fundamentals, Types and Applications, Heinemann Newnes, London, 1990.

V. Subrahmanyam, Electric Drives: Concepts and Applications, Mc Graw-Hill, New York, 1990.

Textbook:

P. C. Krause et al , Electromechanical Motion Devices, Mc Graw Hill Edition , 1989

S.B. Dewan , G.R. Slemon, A. Straughen, Power Semiconductor Drives, John Wiley &Sons, 1984.

B.M. Bird, K.G. KING, D.A.G. Pedder, An Introduction to Power Electronics John Wiley & Sons 1993.

P,C, Sen, Thyristor DC Drives, New York, 1981.

Additional Reading:

1. B.K. Bose, Power Electronics and AC Drives, Prentice-Hall, New Jersey, 1986.

2. P.C. Sen, Principles of Electric Machines and Power Electronics, John Wiley, 1989.

3. J.T. Humphries, Motors and Controls, Merril Publishing Company, Columbus, 1988.

4. G.K. Dubey, Fundamentals of Electrical Drives, Narosa Publishing House, New Delhi.

5. M.E. El-Hawari, Principles of Electric Machines with Power Electronics Applications, Prentice Hall-Reston, 1986.

6. V. Subrahmanyam, Thyristor Control of Electric Drives, Tata Mc Graw-Hill , new Delhi, 1988.

References:


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Detailed Curriculum (Theory)

Behavioral Objectives Contents Hrs The student should have the ability to :

Explain the function of each component in the system drive

Identify and determine the load characteristics

Know different types of electrical drive

Identify and determine the characteristics of electrical drive

Select the appropriate converter adapted to the application needs and constraints

Compare the different methods of electrical machines control

Introduction: Requirements of an adjustable

speed drive Forms of drive motors

Comparison of DC and AC drives Trends in drive technology Choice of electrical drives

Characteristics of Loads: Nature and classification of load

torques Quadratural diagram of

speed/torque characteristics Loads with rotational motion Loads with translational motion Components of loads torques Dynamics of motor – load

combination

Characteristics of Electric Motor Drives Introduction Characteristics of DC motors Characteristics of three-phase

induction and synchronous Motor drives Braking of electric motors:

(Regenerative braking, dynamic braking, counter current braking)

Starting of electric motors: (Direct on line, low voltage starting, rotor resistance starting, low frequency starting, special rotor construction)

Energy relations during starting.

Control of Electric Motor Drives: • Methods of Speed Control of DC

Motor Drives Controlled rectifier feeding DC Motor Four Quadrant DC Chopper feeding DC

Motors • Methods of Speed Control of

Induction Motor Drives Constant voltage operation Constant horse-power operation Constant flux operation

• Methods of Speed Control of Synchronous Motor Drives

Variable frequency supply Voltage source inverter fed synchronous

motor drive

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Current source inverter fed synchronous motor drive


Behavioral Objectives Contents Hrs A graduate student should have the ability to:

Understand the meaning of average and RMS values of currents and voltages.

Show the reversibility of the Static Converters.

Obtain the electrical and mechanical characteristics of the static converter-electrical machine association.

Select the right static converter adapted to the needs and constraints.

Show the merits of the converter fed electrical machine.

Determine and adjust the parameters for speed control.

DC Motor Control

• Controlled Rectifier fed DC Motor Drives

Single phase fully-controlled rectifier Single phase half-controlled rectifier Three phase fully-controlled rectifier Three phase half-controlled rectifier

• Four Quadrant DC Chopper fed Dc

Motor Drives Speed - torque Characteristics

AC Motor Control

• Control Methods of Induction Motor Drives

Stator voltage control Variable frequency control from voltage

sources Variable frequency control from a current

source Rotor resistance control Static rotor resistance control

• Control Methods of Synchronous Motor Drives

Variable frequency control from voltage sources

Variable frequency control from a current source

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Electrical Power / Machines Major Electrical Technology Department ELE 211 Code Electric Circuits Course Title

Physics-2 Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

3 L W

1 T

Contacthr/w

45 L W

15 T

Contact hr/sem.

Course Description :

This course covers electrostatics, DC circuits, and electromagnetic. The course contents include: field, dielectric strength, capacitance, Ohm s law, Kirchhoff s laws, series & parallel networks, power, AC voltages, currents, impedance, series & parallel AC networks, power triangle and power factor correction. The course includes also three phase circuits analysis and the switching phenomena in R-L and R-C circuits

General Goal : This course is designed mainly to give the students a basic knowledge and analysis of DC and AC circuits

Behavioral Objectives : The student should be able to:

• Identify the basic electric quantities

• Apply Kirchhoff s laws, voltage and current division rules and analyze simple circuits

• Recognize the magnetic quantities, self mutual inductance and induced voltage in the magnetic circuits

• Identify the AC quantities (peak, r m s and average values, period, frequency, and phase shift)

• Recognize the wave form, impedance, active power, reactive power, apparent power, and power triangle

• Analyze simple circuits

• Know the configurations of the three phase systems, power in three phase systems and power factor improvement

• Calculate the current and voltage changes due to switching in R-L and R-C circuits



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Topics (Theory & Practice)

Electrostatics D.C Circuits Electromagnetism A.C Circuits Three Phase Circuits Switching Phenomena in R-L and R-C circuits.

Robert L. Boylestad, Introductory Circuit Analysis , Merill, 5th Edition 1987

Textbook:

A. Bruce Carlson & David G. Gisser Electrical Engineering Concepts & Applications Addison-Wesley, 2nd Edition 1990

Additional Reading:

Robert L. Boylestad, Introductory Circuit Analysis , Merill, 5th Edition 1987

References:


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Behavioral Objectives Contents Hrs The student should be able to;

Identify the basic electric quantities

Apply kirchhoff s laws, voltage and current division rules and analyze simple circuits

Recognize the magnetic quantities, self and mutual inductances and induced voltage in magnetic circuits

Identify AC quantities (peak, r.m.s. and average values, period, frequency, and phase shift)

Recognize the wave form, impedance, active power, reactive power, apparent power, and power triangle

Analyze simple circuits Know the configurations of the three phase

systems, power in three phase systems and power factor improvement

Calculate the current and voltage changes due to switching in R-L and R-C circuits

Electrostatic Field

Brief introduction to electrical quantities i.e. current, voltage and electric field.

D.C circuits

Electrical resistance, series and parallel connection, Ohm s Law, Kirchhoff s law,

current and voltage division rule and power. Simple circuit analysis.

Electromagnetic Field Definition of magnetic quantities,

Self and Mutual Inductance. Induced voltage in Magnetic circuits.

A.C Circuits

A.C quantities: Peak, r.m.s values, period, frequency, phase shift, phasor diagrams, wave

forms, impedance, resonance, power (active, reactive and apparent). Power triangle and

power factor. Brief review of related mathematics. Simple circuit analysis.

Three phase circuits

Introduction to three phase systems, different configurations in three phase systems, Power in

three phase systems (Active, Reactive and Apparent).

Power factor improvement

Switching phenomena in R-L and R-C circuits

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Electrical Power / Machines MajorElectrical Technology Department

ELE 212 Code Electrical Instrumentation and Measurements Course Title

Prerequisite

65 4 3 2 1 Semester

2 Credit hr/w

1 L 2 W T

Contacthr/w

15 L 30 W T

Contact hr/sem.

Course Description : This course covers a wide range of measuring instruments,

including their function, constructions, characteristics, calibrations, and applications. The course contents include: introduction to instruments, units, and measurements, errors, moving coil and moving iron instruments, electrodynamics and induction instruments, DC and AC bridges, digital instruments, and oscilloscopes.

General Goal : This course aims to give the students a concise introduction to the theory and practice of electrical

instrumentation and measurements. Behavioral Objectives :

The student should be able to: • Know the S. I. system and the S. I. derived units • Describe the source of errors in measurements and caries out an error analysis • Describe the construction and principle of operation of moving coil, moving iron, electrodynamics and

induction type instruments • Know how to use these instruments in measuring different electric quantities • Know how to extend the range of operation of each instrument • Know how to use DC and AC bridges in measuring resistance, inductance and capacitance • Describe the basic functions of digital multi meter and oscilloscope • Know how to use oscilloscope in measuring different electric quantities



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Topics (Theory & Practice) • Systems • Units • Standards • Errors in • Moving Coil Instruments • Iron Coil Instruments • Electrodynamics Instruments • Induction Instruments Current • Voltage and Resistance Measurements • AC Power and Power factor measurements • DC/AC Bridges • Digital multi meters • Oscilloscope

HUGHES ELECTRICAL TECHNOLOGY, seven edition, 1997, revised by Ian McKenzi Smith Textbook:

BASIC ELECTRICAL and ELECTRONIC ENGINEERING. Fourth edition, By E.C BELL and R.W WHITEHEAD, revised by W BOLTON.

Additional Reading:

References:


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Behavioral Objectives Contents Hrs

The student should be able to:

Know the S. I. system and the S. I. Derived units.

Describe the source of errors in measurements and carry out an error analysis

Describe the construction and principle of operation of moving coil instrument.

Calculate the electromagnetic torque, control torque, and the series and shunt resistance for range extension.

Recognize the basic principle of attraction and repulsion types.

Represent the source of errors in measuring r.m.s values in AC quantities.

Describe the principle of operation

Use the instrument for measuring current, voltage and power

Extend the range of operation

Describe the principle of operation

Use the instrument for measuring current, voltage, power and energy.

Measure the resistance, inductance and capacitance using different bridges.

System of units and standards The S. I. System, The S. I. Drives units.

Error in Measurements

Accuracy, Precision and Sensitivity

Source of errors in measuring systems

Moving Coil Instrument

Construction and principles of operation

The electromagnetic torque and the control torque for a certain angular deflection

The series and shunt resistance for the extension of voltage and current readings.

Advantages and disadvantages Moving Iron Instrument

Basic principle of attraction and repulsion types

Source of errors in measuring the r.m.s values of AC quantities (Voltage and current)

Advantages and disadvantages Electrodynamics Instrument

Principle of operation of Ampermeter, Voltmeter, or wattmeter

Extending the range of operation Induction Instrument Principle of operation of Ampermeter, Voltmeter, wattmeter, and energy meter. DC & AC Bridges

Measuring the resistance using different bridges

Measuring inductance and capacitance using AC bridges.

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Recognize the basic function of digital instrument

Use the multi digital meter

Recognize the basic function of oscilloscope

Use the oscilloscope in measurement

Digital Instruments

Basic functions and applications of multi digital meters. Oscilloscope

Basic functions and applications.

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Behavioral Objectives Contents Hrs The student should be able to;

- Measure the voltage, current and obtain the resistance - Calculate the resistance under consideration of error in measurement - Measure the resistance using AVO - Use Megger in insulation testing.

-Calculate and measure small resistance (0.1Ω to 100 Ω ) by applying Wheatstone and Thomson bridges

-Measure active and reactive power and calculate the power factor. -Measure the power factor using different methods.

Measurement of inductance, capacitance using different AC bridges.

-Describe and handle the oscilloscope in y-t and x-y modes -Measure and evaluate the AC quantities such

Basic Measurements

- Measurement of Voltage, current, and resistance (indirect) - Calculation of resistance under consideration of errors caused by the ammeter and voltmeter - Measuring unknown resistance using a direct measuring instrument (AVO meter) - Basic principle of an insulation meter (Megger) and applying it for insulation testing.

DC Bridges-Calculating and measuring unknown resistances (range from 0.1 to 1 M) by applying the Wheatstone bridge -Comparing Wheatstone with Thomson Bridge.

AC Power and Power Factor Measurement -Measuring the active and reactive power in a single-phase ac circuit and calculating the power factor. -Measuring the power factor using the three voltmeter method or the three ammeter method.

AC Bridges-Practical applications of AC bridges and deriving the two conditions for balancing an AC bridge. -Functions of the Maxwell bridge, Wein bridge, Maxwell-Wein bridge, and Schering bridge

-Application of different AC bridges

Oscilloscope-Describing the handling of the oscilloscope in the y-t and x-y modes -Measuring and evaluating AC quantities such as f, t, Upp, Up, etc -Measuring the characteristics of electrical and electronic components.

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as f, t, Up, Upp, etc. 6

Electrical Power / Machines MajorElectrical Technology Department ELE 341 Code Protection of Electrical SystemsCourse Title

Electrical Distribution Systems Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : This course introduces the student to common faults on

electrical power system components i.e. generators, motors, feeders & transformers and the practical measures recommended through application of different protective schemes.

General Goal : At the end of the course the student will understand the functioning and setting of different types of

industrial relays: Over-load (O/L), definite time and inverse definite minimum time (IDMT) O/C relay, over and under voltage relay, frequency relay and directional relay. The student will also develop adequate theoretical and practical knowledge with regards to choosing proper protective schemes for different power systems components (motors, generators, feeders and transformers).

Behavioral Objectives :

Upon course completion the student will be able to perform the following tasks:

. Recognize different types of electrical faults and explain their effect on electrical systems components.

2. Define terms related to protection of electrical systems and describe the construction, functioning and application of current transformers, voltage transformers (C.Ts, V.Ts) and different types of protective relays. . Identify common abnormal conditions in generators, transformers, feeders & motors and choose proper protective scheme for specific fault condition.

4. Calculate pick-up current / time of operation for O/C relays in simple radial systems. 5. Construct the wiring diagrams required for testing O/C, under/over voltage and directional relays and

make necessary measurements. 6. Use computer application software to do protection coordination analysis for practical radial and ring

circuits.



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Topics (Theory & Practice) Theoretical Topics:

• Brief review of faults in electrical systems • C.Ts & V.Ts • Introduction to protective relays • Generator protection Transformer protection • Feeder protection Motor protection.

Practical Topics:

• Testing of C.T & V.T (single & three phase) • Testing of definite time O/C relay • Testing of I.D.M.T relay • Testing of over / under voltage relay • Testing of directional relay • Application of different types of relays to transmission line (T.L) model • Protection coordination using computer software application.


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Power systems protection, 4 volume set (Principles & components, Systems

& methods, Application and Digital protection & signaling) ISBN # 0-85296-834-5/836-1/837-X/838-8, 1995, Edited by the British

Textbook:

1. Generator protection application guide, Basler Electric Company, 1994. 2. Generator protection application guide, ABB Company, 1986. 3. Application guide for industrial generator protection, GEC Company, 1995.

4. Power transformer protection application guide, ABB company, 1988. 5. Transformer protection application guide, Basler Electric Company, 1996.

6. Application guidelines for protection of industrial three-phase motor, GEC company, 1995.

7. Protective relays training course, ISCOSA Training Center, 1994. 8. Introduction to protection & electromagnetic relays, Technical short course, SCECO East, 1994.

9. Industrial SwitchGear Technology, Dr. M.M. Abdul Ghani, College of Technology at Dammam, Short training course, 1997.

Additional Reading:

Protective relaying theory and applications, ASEA Brown Boveri Transmission & Distribution Dept, 1994, Marcel Dekker publisher.

Protection of electricity distribution networks, J.Gers & E.J.Holmes, IEE Series, 1998, ISBN # 0-85296-923-6.

Power system relaying, Stanley H. Horowitz, Second edition, 1995, Research Studies Press Ltd.

Electricity Training Association. Protective relays application guide, GEC Company, 3rd edition, 1995. IEEE Guide for AC generator protection, IEEE Std C37.102, 1995. Guide for AC motor protection, ANSI/IEEE C37.96, 1988. Guide for protective relay applications to power transformers,

ANSI/IEEE C37.91, 1985.

References:


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Behavioral Objectives Contents Hrs The student should be able to:

• Recognize different types of electrical faults and explain their effects on electrical system s performance.

• Describe the construction, functioning

and application of current & voltage transformers and draws the connection diagram.

• Define terms related to electrical

protection. • Describe the construction, functioning,

application and setting of the most common industrial protective relays.

• Classify relays according to their IEEE function number.

• Identify different faults in generators. • Compare between different stator

earthing conditions from the point of view of phase to ground fault detection.

• Choose and properly set protective relays required for specific fault condition.

• Identify different faults in

transformers. • Choose and properly set protective

relays required for specific fault condition / transformer size and function.

• Solve special problems associated with differential protection schemes.

• Explain the function of fault monitoring equipment.

1. Brief review of faults in electrical systems: Sources of S.C current, Types of faults (O/L, S.C, and O.C) and their effects on electrical system s components.

2. C.Ts & V.Ts: Construction,

connection, accuracy requirements and preferable ratings of single & three-phase type.

3. Introduction to protective relays:

Brief definition of protection terminology (sensitivity, selectivity, speed, reliability, dependability and coordination), Construction, application, setting and associated IEEE function numbers of O/L relay, definite time and IDMT relay, over & under voltage relay, frequency relay and directional relay.

4. Generator protection: Stator ground

fault protection, taking into consideration different types of earthing (direct, low resistance and distribution transformer earthing), Rotor earth fault protection, Stator phase fault protection, Back-up protection (voltage restrained & voltage controlled O/C relays), Reverse power protection, Over/Under frequency protection.

5. Transformer protection: Overload,

over-current, ground fault and Bucholz relay protection for transformers less than 5 MVA, Differential protection and associated problems for transformers greater than 5 MVA, Fault monitoring (temperature monitoring, pressure relief valves, oil level monitor, Silica gel dehydrating breather).

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• Describe the importance of feeder protection.

• Explain / analyze coordination between adjacent relays using different grading methods.

• Name different kinds of faults in electrical motors.

• Apply / properly set protective relays required for specific fault condition.

6. Feeder protection: Application of instantaneous & IDMT relays, connection of relays, coordination between adjacent relays and the grading margin, Application of earth fault relays, their types, setting principles and connections.- Directional protection.

7. Motor protection: Thermal O/L

protection, locked rotor protection, phase unbalance & single phasing protection, earth fault protection and under current protection, S.C protection for both contactor controlled and C.B controlled motor.

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The student should be able to :

• Construct the wiring diagram required for testing C.T s primary & secondary current.

• Calculate, from the results, transformer s accuracy.

• Construct the wiring diagram required for testing V.T s primary & secondary voltage.

• Calculate, from the experimental results, transformer s accuracy.

• Construct the wiring diagram required for testing the pick-up/dropout current and time of operation of definite time & IDMT relay.

• Formulate, from the experimental results, the tripping characteristics of IDMT relay for different time dial settings.

• Construct the wiring diagram required for testing the pick-up/dropout voltage and time of operation of over/under voltage relay.

• Analyze experimental results and compare them to relay s data sheet.

• Construct the wiring diagram required for

testing the pick-up/dropout current and time of operation of directional relay.

• Analyze experimental results and compare them to relay s data sheet.

• Construct the wiring diagram required for application of relays to protection of a T.L model.

• Test for different types of faults and fault locations.

Use a computer application software in order to calculate the pick-up current / time setting of adjacent relays in both radial & ring circuits.

Measuring primary, secondary current and accuracy of single, three-phase & summation C.T.

Measuring primary, secondary voltage and accuracy of single & three-phase V.T.

Measuring pick-up, dropout current, time of operation and I/t characteristics of definite time and inverse time relay (IDMT).

Measuring pick-up, dropout voltage and time of operation for over/under voltage relay.

Measuring pick-up, dropout current and time of operation for directional power relay.

Application of definite time and IDMT O/C relays to a T.L model under different fault configurations.

Protection coordination using computer application software. Recommended software is EDSA software.

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ELE 331 Code Control Technologies and Automation Course Title

Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : The course covers the terminology, concepts, principles,

procedures and computations used to analyze, select, specify, design and maintain control systems. Emphasis is on the application of well-established methods with the aid of examples and computer programs. Further, students will also learn about building automation technologies and its applications.

General Goal : The goal of this course is to provide the student with the basic knowledge of control systems technology,

so that he is able to understand how to analyze and design industrial control systems. In addition, students are also provided with the knowledge necessary for implementing building automation technologies.


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Behavioral Objectives : At the end of this course, the student should be able to:

Define a control system (openloop and closedloop), sketch a block diagram, and perform simple block diagram simplifications

Describe process control, process controller, and servomechanism

Describe the physical elements of each part of the control system, and explain the role of each element in the system

Define the steadystate gain, settling time, maximum overshoot, and damping ratio Generate the above characteristics and system time responses using SIMULINK. Define desired controller characteristics. Explain the role of each element of P, PI and PID controllers in a closedloop setting. Design P, PI, and PID controllers using the Ultimate Cycle method.

Explain the historical and technical background about the development of Building Automation Systems (BAS).

Identify and draw relevant diagrams and circuits using recognized standards. Name recognized terms and specifications of BAS for different applications. State the general functions of controller and modules in BAS. Define the importance of special programming and application software for BAS. Specifies the construction of digital telegrams and bus transmission techniques. List Hard and Software components of the European Installation Bus System (EIB). Explain their function and plan complete circuits. Explain the use of Direct Digital Control (DDC) used for complex BAS. Identify different system components like controller, modules, sensors and actuators. Program controller (Free programmable) with a specialized programming software. Write small application plot programs for monitoring of devices. Operate different facility management programs for energy control, efficiency, coast, maintenance etc.



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Topics (Theory & Practice) This course covers basic concepts and terminologies Types of industrial control. Industrial control systems, control system analysis. Control system design. Building automation systems Introduction to equipment and devices (lab) Analysis of industrial system responses (lab) Closed-loop control of industrial systems (lab) Computer simulation and building automation systems (lab).

Automatic Control Systems Publisher: Prentice-Hall

Author: Benjamin Kuo

Textbook:

Introduction to Control System Technology Author: Robert Bateson Publisher: Prentice-Hall, 1996

Additional Reading:

Handbook of Automatic Control and instrumentation Publisher: McGraw-Hill Author: Richard dorf

Automatic Control Systems Publisher: Prentice-Hall Author: Benjamin Kuo

References:


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After completing this chapter, the student will be able to do the following: Define a control system (openloop and closedloop) Sketch a block diagram and perform simple block diagram simplifications Define a criteria for a good control system

This chapter will enable the student to describe/explain: Analog and digital signals Process control and process controller Servomechanism The difference between the three control systems

After completing this chapter, the student will be able to describe/explain: The physical elements of each part of the control system The role of each element in the system

This chapter will enable the student to define the following as they relate to a given system. Steadystate gain Settling time Maximum overshoot Damping ratio Further, students will be able to

I. Basic Concepts and Terminologies: Importance of control systems (motivational example: e.g. simple level control system, DC motor, etc.) Block diagram concepts (I/O relation using industrial example e.g. DC motor) Open-loop control: Concepts, advantages and disadvantages Closed-loop systems: Concepts, advantages and disadvantages Objectives of control systems: Stability, regulation, and transient response. Brief introduction to block diagram simplification: simple cascade and negative feedback block diagrams. II. Types of Industrial Control: Definition of Analog and digital control. Definition of process control Servomechanism III. Industrial Control Systems: Common components of industrial systems: Final control elements. Control valves Electric motors Servo valves Sensors and transducers Controller Measurements in control technology: The Op-Amp as a signal conditioning. Measurements of the following will be introduced: position, displacement, velocity, acceleration, force, temperature, flow rate, pressure and level. IV. Control System Analysis: Introduction to Laplace Transformation using tables System transfer function (first and second order systems). Time-domain analysis by step response of industrial open-loop systems. Time-domain characteristics.

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generate the above characteristics and system time responses using SIMULINK.

After completing this chapter the student will be able to: Define desired controller characteristics. Explain the role of each element of P, PI and PID controllers in a closedloop setting. Design P, PI, and PID controllers using the Ultimate Cycle method. Design P, PI, and PID controllers using the Ultimate Cycle method. Explain the historical and technical background about the development of Building Automation Systems (BAS). Identify and draw relevant diagrams and circuits using recognized standards. Name recognized terms and specifications of BAS for different applications. State the general functions of controller and modules in BAS. Define the importance of special programming and application software for BAS. Specifies the construction of digital telegrams and bus transmission techniques. List Hard and Software components of the European Installation Bus System (EIB). Explain their function and plan complete circuits. Program and commission circuits with EIB busdevices by using the EIB Tool Software (ETS). Design more complex Home Electronic Systems (HES) for house appliances in residential buildings. Explain the use of Direct Digital Control (DDC) used for complex BAS. Identify different system components like controller, modules, sensors and actuators. Discriminate between: Static controller for parameter setting and free programmable controller. Program controller (Free programmable) with a specialized

Lag, settling time, damping, etc… Use of SIMULINK to illustrate the concepts introduced above. V. Control System Design: Define the closed-loop desired characteristics of the controlled system. Explain the role of each element of P, PI and PID controllers in a closed-loop setting. The Ultimate Cycle method of P, PI, PID control design. The Process Reaction method for P, PI, PID control design. Use of SIMULINK to illustrate the concepts introduced above. VI. Building Automation Systems: -Historical development of BAS. Standardized terms, abbreviations, specifications and symbols of bus operated building control and automation technologies. General functions of digital control and automation systems: Switching, positioning, measuring, counting and reporting. control and regulator functions. Different philosophies of general structure: Centralized and decentralized systems. Hardware components (Bus devices) of the European installation Bus System. EIB Topology, structure of the network. Transmission technique, bus access and telegram structure. Programming with the EIB Tool Software (ETS). Interfaces to other automation systems and to telecommunication networks. EIB Bus protection. Description of applications. Programming, commissioning, operation and maintenance. General Structure of Home Electronic Systems (HES) in residential buildings. Appliances for HES Systems. Home assistance application software.

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programming software. Write small application plot programs for monitoring of devices. Operate different facility management programs for energy control, efficiency, coast, maintenance etc. Summarize the advantages of a BAS for large buildings or areas like Hotels, Hospitas, Shopping centers, Airports etc.. Recognize future development towards compatible software protocol systems

General structure of Building Automation Systems using DDC technology. Controller and modules for DDC systems. Sensors and actuators for DDC systems. Control of Standalone plants with Field Processor Units (FPU) and DDC Modules using different types of controller. Programming free programmable systems with Control Orientated Language for Building Automation Systems (COLBAS). Control of several FPU’s by Central Processor unit (CPU) and application software for building management using different types of controller. Integrating several FPU’s of different manufacturers by means of gateways and common protocol languages like: BACnet, LON, LAN, ASI etc. Advantages and disadvantages of such integrated networks


٣١


Behavioral Objectives Contents Hrs I. The student is able to distinguish and describe the use of lab equipment and devices. II. The student is able to to determine static and dynamic characteristics of an industrial system (thermal, DC-motors, flow) and analyze the system by means of time responses. III. The student is able to design and implement P, PI and PID controllers on the given industrial systems. In addition the student will be able to choose the control type for the given industrial system using the system characteristics determined in II.

I. Introduction to equipment and devices: Students are provided with an introduction to the various types of equipment and devices that will be utilized during the course. II. Analysis of Industrial system responses: In the next three weeks students will perform the following practical exercises:

Analysis of thermal system response. Defining the step response of an open-loop thermal system in order to determine its static and dynamic characteristics. Students should be introduced to following system characteristics: lag time, settling time, and temperature-voltage (T/V) correspondence.

Analysis of a DC motor system response. Defining the open-loop step response of a DC motor with the aid of a tachometer. Defining the DC motor static and dynamic characteristics. Students should be introduced to following system characteristics: settling time, maximum overshoot, and speed-voltage (N/V) correspondence.

Analysis of a flow system response. Defining the open-loop step response of the flow system. Determining its static and dynamic characteristics. Students should be introduced to following system characteristics: settling time and height-voltage (h/V) correspondence. III. Closed-loop control of Industrial systems: In the next three weeks students will perform the following practical exercises:

Closed-loop control of a thermal system. • With the use of P-type control, the

influence of Kp on the static error and settling time should be illustrated.

• By using a P.I. control, the concept of

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IV. The student will be able to use mathematical models of given industrial systems and design corresponding controllers using SIMULINK. Further, the student is able to explain the source of differences in practical and simulation results (exercises in II-IV).

static zero-error should be introduced.

Closed-loop control of a DC motor

system. Closed-loop speed control of a DC motor is achieved using the following:

• With the use of P-type control, the influence of Kp on the static error and settling time should be illustrated.

• By using a P.I. control, the concept of static zero-error should be introduced.

P.I.D. control, where the influence of the D-type element should be noticed. Closed-loop control of a flow system.

Closed-loop level control of a flow system is achieved using the following:

• With the use of P-type control, the influence of Kp on the static error and settling time should be illustrated.

• By using a P.I. control, the concept of static zero-error should be introduced. IV. Computer simulation: In the next three weeks, computer simulation of the following should be performed. 1) Thermal system control

• Open-loop thermal system. • Closed-loop control of a thermal

system with the same parameters as in II. • Comparison with practical results from

II and III.

DC-motor system • Open-loop DC-motor system • Closed-loop speed control with the

same parameters as in II. • Comparison with practical results from

II and III.

Flow system • Open-loop flow system • Closed-loop control of a flow system

with the same parameters as in II. Comparison with practical results from II and III.

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Apply visualization software for complex systems Connect different DDC devices on a training unit to wire a complete circuit. Identify different controller characteristics by observing the function of the controlled actuator. Evaluate control circuit performance by running special plot programs. Compare between static controller and free programmable controller. Write small task programs with the Control oriented Language for Building Automation (COLBAS). Analyze system functions by measuring the controller output signals. Predict further development in the field of bus operated control and automation systems. Monitor and operate a complex Building Automation System (Training unit). Explain how to control several buildings within a country from one remote location.

V Building Automation Systems (BAS): Setting up a complete control circuit with European Installation Bus (EIB) devices like: Power supply unit, choke, interface, several bus couplers with bus devices. Programming all devices with the EIB Tool Software (ETS). Commissioning and testing the EIB circuits. Changing the function of some bus-devices, (From switching to dimming). Overvoltage and surge protection of EIB bus-lines. Programming logical functions with logic modules. Integrating binary and analogue in and outputs to the EIB System. Application of visualization software for complex EIB systems. Setting up small control circuits with DDC components like: DDC FPU, modules, sensors and actuators. Commissioning and testing DDC circuits by observation of controlled devices (Motor valves etc.) Measuring controller output signals (0-10V) according to the choosen characteristic (P-I-D, PID). Writing and running time-plots to monitor devices (Temperatue – signal output – valve position). Running special tasks for peak control, duty cycle program, optimum start-stop program etc. Writing specialized programs using the Control oriented language for Building Automation (COLBAS). Connecting several Field Processor Units to one Central Processor Unit. Connecting several Buildings in different towns via telephone modem to a national control center. Visits to Buildings with BAS in the vicinity of the College. The student will be able to: Connect EIB bus and power lines on a training unit to wire a complete control circuit. Configurate different bus devices with their physical address, using the ETS software. Test the circuits using ETS test-routines. Change function of bus devices by re-configuration. Choose protection devices for bus lines from overvoltage spikes. Program logic functions with logic modules. Integrate binary and analogue external devices to digital systems.

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Electrical Power / Machines MajorElectrical Technology Department ELE 241 Code Electrical Distribution Systems Course Title

Electric Circuits Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : The course introduces the student to terms, standards,

regulations, systems, technologies and devices used for planning, commissioning and maintaining LV installations and distribution systems from electric utility consumer unit to branch circuits and outlet points in different operating places

General Goal : After finishing the course the student will be able to plan and supervise electrical installation from feeding

point to outlet point in residential, commercial and industrial buildings and premises. He will develop adequate theoretical knowledge of relevant standards, regulations and methods of electrical installations using the correct materials and devices for any operating place.To achieve these goals the student should know how to deal with conventional and computer aided tools like books, tables and computer application software (CAS).

Behavioral Objectives : Upon course completion the student will be able to perform the following tasks:

. Define terms related to electrical installations in residential, commercial and industrial premises. 2. Apply relevant national and international rules, standards and regulations to LV distribution systems.

. Describe the function of different types of protective and swichting devices for LV distribution systems. 4. Compare different earthing systems in LV installations and apply the correct protective measures. 5. Calculate relevant units and factors for the installation of LV distribution systems.

6. Design, calculate and draw wiring diagrams for distribution systems in larger premises and in different operating areas (hand calculations and through using CAS).

7. Design, calculate and draw branch circuits for light and power outlets in residential, commercial and industrial premises and different operating areas (hand calculations and through using CAS).

8. Explain and calculate relevant factors for illumination. 9. Distinguish between different types of lighting fixtures and their application. 0. Design illumination systems, using CAS.



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Topics (Theory & Practice) Theoretical Topics:

• Introduction to the regulation and standards. • Introduction to L. V. Consumer feeding meteringand distribution systems and devices. • Introduction to earthing and protective measures in L.V installations • Designing of L. V. distribution systems Introduction to illumination

Practical Topics:

• General rules of safety • maintenance & repair • Demonstration of different types of LV wires and cables • Demonstration of electric utility consumer feeding unit single and three-phase metering distribution

system and devices • Measuring of earth resistance loop resistance installation resistance and setting of RCD s and appliance

check • Designing of LV distribution systems & branch circuits in different premises using • CAS. • Demonstration of light fixtures and their effects / Measuring and planning of lighting illumination

systems.


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Electrical Installation Technology, Theory and Regulations, 3.edition M. Lewis - Stanley - Thomas ISBN 0-7487-0272-5

Textbook:

1. Siemens : Electrical Installations Handbook I, II, III ISBN 0-47- 91343-X 2. Practical Electrical Wiring 17th editon ISBN 0-07-05395-9 3. Technical Terms for Electrical Engineering GTZ Eschborn 4. Basic Wiring Techniques T. Jeff Williams Ortho Books ISBN 0-89721-000-X 5. Series: Information on lighting application 1 – 14 FGL Gutes Licht, 60591 Frankfurt/Germany.

Additional Reading:

Requirements for Electrical Installations BS7671:1992, IEE series, 1997, ISBN # 0-85296-927-9. 2. NEC 1996 Handbook, 7th edition, NFPA ISBN # 0-87765-405-0 3. Understanding the NEC, 2nd edition, Michael Holt, 19996 ISBN # 0-8273-6805-4 4. Safety of electrical Installations up to 1 000V Wilhelm Rudolph VDE Publishing House ISBN # 3-8007-1610-0 5. Electric utility Regulation and standards for Distribution and Grounding SDS-1 6. Potential Systems with Isolation monitoring Wolfgang Hofheinz VDE Publishing House 7. Industrial and commercial Power Systems Handbook, F.S. Prabgakaa Mc.Graw/Hill 1996 ISBN # 0-07-050624-8 8. Handbook of Electrical Installation Practice, 2nd edition E.M. Reeves Mc.Graw/Hill ISBN # 0-632-02678-2 9. Handbook of practical electrical design, 2nd edition, Josef F. Mc.Partland, McGraw-Hill, 1995, ISBN # 0-07-045820-0. 10. Industrial Maintenance Reference Guide R. Rosater & J.O. Rice Mc.Graw/Hill ISBN # 0-07-052162-X 11. Electrical Safety: a guide to the causes and prevention of electrical hazards, J. Adams ISBN # 0-85296-806-X 12.EDSA Application Software, EDSA Micro Corporation, San Diego, California. 13. Electrical Wiring Commercial, 9th edition, Ray Mullin, 1996, Delmar Publishers, ISBN # 0-8273-6655-8. 14. Electrical Wiring Industrial, 9th edition, Robert Smith, 1996, Delmar Publishers, ISBN # 0-8273-6653-1. 15. Electrical Wiring Residential, 12th edition, Ray Mullin, 1996, Delmar Publishers, ISBN # 0-8273-6841-0.

References:


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• Discriminate between different national and international standards and regulations required for the installation of LV networks.

• Compare applicable units and symbols for electrical cirucit diagrams.

• Identify wires and cables using harmonized standards.

• Apply relevant standards, systems and materials recommended by the electric utility for the installation and connection of consumer feeder units.

• Explain the different systems and to apply them in a correct way.

• Define terms of different LV earthing systems and describe their application.

• Explain the different methods of protection, for humans and animals, against electric shock.

• Describe the construction, functioning, application and setting of different protective devices against shock, lightning and overvoltage.

• Design and calculate a complete distribution system in residential, commercial or industrial premises.

• know how and when to apply the correct devices.

1. Introduction to regulations and

standards Regulation and standards - National & international electrical standards (SASO, IEEE, IEC, BS, VDE, DIN, NEC, ISO etc.) - National and international electrical units and terminology - National and international electrical drawing symbols - Terminology of wires and cables cross-section (AWG, MCM, mm2).

2. Introduction to LV consumer feeding, metering & distribution systems and devices: Electric utility overhead and underground distribution system with mini-pillars - Electric utility current meter boxes (Consumer units) for indoor and outdoor installations - Earthing and bonding at consumer feeding point - Consumer main panels (residential, commercial and industrial) in different operating places (wet and humid, fire endangered, explosion hazards, etc.) - Construction and ratings of distribution devices (fuses disconnectors, MCBs, RCDs etc) - Consumer – Sub-distribution panels and systems in commercial and industrial premises and different operating places.

3. Introduction to earthing & protective measures in LV installations: Earthing systems (TN-C, TN-S, TN-C-S, TT and IT) - Potential equalization - Protection of humans and animals against electric shock, Function of RCD s Lightning & surge protection.

4. Designing of LV Distribution systems: Sizing of branch circuit conductors, protective devices, switches, outlets, connectors etc. - Sizing of conduits, trunkings and industrial bus-bars - Sizing of feeders and subfeeders and their protective devices - Sizing of main and sub-disconnectors - Power factor

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• Calculate and analyze the system with respect to power factor correction.

• Explain lighting terminology and draw light intensity distribution curves of different fixtures.

• Calculate, number and type of fixtures required for a certain area, manually or by using CAS.

• Explain luminous features and the construction of different types of lamps.

• Explain the stroboscopic effect of 3-phase illumination sets and its elimination.

correction. Introduction to illumination: Illumination characteristics of lamps (incandescent, fluorescent, L & H sodium and mercury pressure lamps, LV and ELV Halogen) - Lighting fixtures for different purposes and indoor/outdoor installations - Planing and calculation of illumination systems by using tables and software applications.

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Explain general rules for safety, repair and maintenance of tools, equipment and electrical installations.

Design time and cost schedules for repair and maintenance of electrical installations.

Identify and distinguish between different wires and cables.

Explain the construction of different types of wires and cables. Design a complete LV distribution line from transformer to consumer unit, in accordance with electric utility standards.

Identify different LV distribution systems. Carry out the necessary measuremts in such systems.

Set protective devices and check their function.

Draw wiring diagrams using CAS. Plan & design LV distribution systems and branch ciruits using CAS.

1.General rules of safety, repair and maintenance:

Theoretical introduction to general safety of tools and equipment - Introduction of special safety rules for work on electrical networks - Rules for behaviour in case of electric shock - Purpose and need of preventive maintenance in electrical installations, Developing of repair and maintenance time schedules and distributing tasks to specialized teams.

2.Demonstration of different types of LV wires and cables:

Demonstration with sample-boards of wires and cables, produced abroad and within the Kingdom, With respect to materials, construction and application.

3.Demonstration of electric utility consumer feeding units, single and three-phase metering, electric utility distribution systems and devices:

Demonstration of pre-wired electric utility consumer units with one or two meters, single or three phase, Demonstration of pre-wired electric utility mini- pillars, Demonstration of electric utility LV underground and overhead distribution.

4.Measuring of earth resistance, loop resistance, insulation resistance, setting of RCD s and appliance check:

Measuring of earth/ground resistance (Step voltage, Voltage drop), Measuring of dielectric resistance (insulation), Measuring of loop resistance. Setting and testing an isolation monitoring circuit. Setting and testing protecive devices, Safety and function test of repaired appliances.

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Describe related terms and use these terms to calculate the correct number and type of light fixtures for different purposes. Explain the construction and functioning of different lamps and fixtures.

Calculate illumination systems using CAS.

5.Designing of LV distribution systems and branch circuits in different premises using CAS:

Designing of distribution systems in residential, commercial and industrial premises, Designing of L.V. branch circuits in residential, commercial and industrial premises - Designing of L.V. distribution boards and cabinets, Cost calculation of installations for tendering.

Demonstration of high fixtures and their effects on measuring and planning of lighting illumination systems:

Measuring of relevant lighting parameters (velocity, luminous flux, luminous efficiency, luminous density) using different types of lamps and fixtures- Drawing light intensity distribution curves, Comparing the effects of different light sources: Incandescent lamps, Fluorescent lamps, Gas discharge lamps, Halogen lamps by use of demonstration boards and samples, Designing of illumination systems, Demonstrating the stroboscopic effect in AC circuits and its prevention.

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ELE 251 Code DC Machines and Transformers Course Title

Electric Circuits Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : The course covers constructional features, principles of

operation, classification, equivalent circuits, parameters evaluation, characteristics, testing and applications of DC machines and transformers.

General Goal : This course aims to give students basic knowledge of theory, performance analysis and applications of DC

machines and transformers.

Behavioral Objectives : This course will enable the student to analyze the overall performance of a system of which the DC machine or transformer happens to be an integral part. It also gives the student a deep understanding of various aspects of machine behavior for general industrial applications. A graduated student should have the ability to install, operate and maintain electric equipment and machines.



٤٢

Topics (Theory & Practice) Electromagnetism (Magnetic Circuits) DC Machines (Generators and Motors)

Transformers (Single-Phase and Three-Phase Transformers)

Laboratory Experiments.

Mulukutla S. Sarma, Electric Machines, (Steady-state Theory and Dynamic Peformance), West Publishing Company, Minneapolis/St. Paul, New York, Second Edition, 1994.

B.S.Guru and H. R. Hiziroglu, Electric Machinery and Transformers, Harcourt brace and company, New York, Second Edition, 1988.

Textbook:

A.S. Langsdorf, Principles of Direct- Current Machines, New York: Mc Graw-Hill, 1959.

J. Hindmarsh, Electrical Machines and Their Applications, 2d ed., New York, Pergamon, 1970

Additional Reading:

A.E. Fitzgerald, C. Kingsley and A. Kusko, Electrical Machinery, 3d ed., New York, Mc Graw-Hill , 1971.

S.A. Nasar and E. Umnewehr, Electromechanics and Electric Machines, New York, John Wiley & Sons, 1979.

References:


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Behavioral Objectives Contents Hrs The Student…

describes the relationship between electric current and magnetic flux

knows the principles of electromagnetism and their terminology

describes simple magnetic circuits and calculates magnetic quantities

describes the construction and operating principles of a DC machine

distinguishes DC- generators from their type of excitation

explains the armature reaction and its compensation

explains the working principles of DC-motors

deduces the equation of the developed torque

distinguishes the different types of DC-motors and draws their schematic diagrams

describes the methods of reversing and speed regulation

knows starting methods of dc-motors calculates the efficiency of DC-machines

describes the construction and working

principles of a single-phase transformer explains the properties of an ideal

transformer, draws the equivalent circuit and deduces the equation for transformation ratio of voltage, winding, current and impedance transfer by applying induction law

describes the open-circuit and short-circuit tests for parameter evaluation

describes the load terminal voltage by using the phasor diagram applying different loads

draws the phasor diagram, determines the iron and copper losses and calculates the efficiency

describes the requirements for parallel operation of transformers

compares a transformer with an autotransformer and names advantages and disadvantages for applications

1 Electromagnetism:

Review of Magnetic Circuits: Concept of a Magnetic Circuit, Reluctance, MMF, Analogy Between Electric and Magnetic Circuits.

2 DC Machines :

Constructional Features and Operating Principles of DC Machines.

- Armature Windings and the Induced EMF Equation.

- Methods of Excitation: Separately Excited, Shunt, Series, Compound: Long and Short, Cumulative and Differential.

- Mode of Operation: DC Generators, Voltage Build Up, Critical Field Resistance,

Voltage Regulation, Armature Reaction, Commutation, Inter-poles, MMF, and Flux

Components.

DC Motors: Torque Equations, Torque/ Speed with Different Methods of Excitation,

Speed Regulation, Starting and Speed Control.

Losses in DC Machines and Efficiency.

3 Transformers :

Constructional Features of transformers, Configurations, Types, and Theory of Operation.

Voltage and Current Transformation Ratios, Equivalent Circuits, and Phasor Diagrams.

Transformer Tests: No-Load and Short-Circuit Tests.

Performance: Load Characteristics, Voltage Regulation, Losses and Maximum Efficiency Criterion.

Three-Phase Transformer Connections. Parallel Operation of Transformers. Auto-Transformers

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Electrical Power / Machines MajorElectrical Technology Department ELE 252 Code Alternating Current Machines Course Title

DC Machines and Transformers Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : The course covers constructional features, principles of

operation, classification, equivalent circuits, determination of the parameters, characteristics, testing, and applications of induction and synchronous machines.

General Goal : This course aims to give the students basic knowledge of operating principles, performance analysis, and

applications of induction and synchronous machines.

Behavioral Objectives : - This course is carefully designed to give students in Electrical Technology a deep understanding

various aspects of AC machine performance that are necessary for industrial applications. - Graduated students should have the ability to install, operate, measure, maintain and control the

AC machines.



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Topics (Theory & Practice) Induction Machines: Polyphase and Single-Phase Induction Motors. Synchronous Machines: Generators and Motors Laboratory Experiments.

M. S. Sarma, Electric Machines: Steady-state Theory and Dynamic Performance, West Publishing Company , Minneapolis/St. Paul, New York, Second Edition, 1994.

B.S.Guru and H.R. Hiziroglu, Electric Machinery and Transformers, Harcourt brace and company. New York, Second Edition, 1988.

Textbook:

1. P.L. Alger, Induction Machines-Their Behaviour and Uses, 2d ed., New

York, Gordon and Breadch, 1970 2. M.G. Say, Alternating Current Machines, New York, John Wiley &

Sons, Halsted Press, 1976.

Additional Reading:

1. P.L. Alger, Induction Machines – Their Behaviour and Uses, 2d ed., New York, Gordon and Breadch, 1970

2. M.G. Say, Alternating Current Machines, New York, John Wiley & Sons, Halsted Press, 1976.

3. J. Hindmarsh, Electrical Machines and Their Applications, 2d ed., New York, Pergamon, 1970

References:


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Behavioral Objectives Contents Hrs The student…

describes the construction and the working principles of a three-phase induction motor

explains the behavior of a three-phase induction motor with their characteristic curves

describes the control of three-phase induction motors (direction of rotation, speed control)

describes the different kinds of starting of three-phase induction motors

describes the construction and the working principles of a single-phase induction motor describes the different kinds of starting and operation of single-phase asynchronous motors

Induction Machines : - Constructional Features and Operating

Principles of Polyphase Induction Machines, Rotor Configurations and Theory of Operation.

- Equivalent Circuit of Polyphase Induction Machine and Phasor Diagrams.

- Equivalent Circuit from Test Data. - Polyphase Induction Motor

Performance: Power Equations, Power Flow Diagram, Torque/ Speed Characteristics, Efficiency.

- Speed Control of Polyphase Induction Motors:

- Pole-Changing Method, Variable-Frequency Method, Variable Line-Voltage Method, Variable Rotor-Resistance Method, Rotor-Slip Energy Recovery Method.

- Starting Methods for Polyphase Induction Motors:

- Star-Delta Starter, Auto-transformer Starter, Reactor Starter, Rotor Resistance Starter, Part Winding Starting.

- Constructional Features and Theory of Operation of Single-Phase Induction Motors.

Equivalent Circuit of a Single-Phase Induction Motor Based on the Revolving-Field Theory.

- Starting Methods for Single-Phase Induction Motors:

- Split-Phase Motors, Capacitor-Run Motors, Capacitor-Start Motors, Capacitor-Start and Capacitor-Run Motors, Shaded-Pole Motors.

- Applications for Induction Motors.

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describes the construction and working principles of synchronous machine

distinguishes between salient pole and non-salient pole machines

draws the equivalent circuit of the generator and develops from it the phasor diagrams

Synchronous Machines :

- Constructional Features of Synchronous Machines.

- Armature Winding, and EMF Equation.

- Equivalent Circuit of a Synchronous Machine.

- Power-Angle and Performance Characteristics of Synchronous Generators.

- No-Load and Short-Circuit Tests of a Synchronous Generator.

- Voltage Regulation: Synchronous Impedance Method and Simple-Ampere Turn Method.

- Synchronization Process, Parallel Operation and Load Sharing of Synchronous Generators.

- Synchronous Motors: Starting Methods, V-Curves, Synchronous Capacitor, Power Factor Correction.

- Applications for Synchronous Motors.

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Behavioral Objectives Contents Hrs The student …

builds up the measuring circuits for single and three-phase asynchronous motors, takes data from the rating plate, measures the characteristic values and discusses the results

builds up the measuring circuits for synchronous generators, takes data from the rating plate, measures the characteristic values and discusses the results

Part-I Induction Motors:

No-Load and blocked rotor tests.

- Determination of motor parameters.

Load characteristics. Different methods of starting. Different methods of speed

control. Starting methods of single-

phase induction motors. Feeding a three-phase

induction motor from a single phase supply using capacitors

Part- II Synchronous Generators:

No-Load and blocked rotor tests.

Equivalent circuit constants. Determination of voltage

regulation: synchronous Impedance and Ampere-turn method.

Load characteristics. Parallel operation and

synchronization process. V-curves of a synchronous

motor.

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Behavioral Objectives Contents Hrs The Student…

builds up the measuring circuits for different kinds of DC-machines

puts these circuits into operation, measures their characteristic values and discusses the results

Carry out the open circuit and short circuit tests for parameters evaluation of transformers

Measures the load characteristic for both transformers

Knows the different connections for three phase transformers

No-Load Characteristics of DC

Generators. Load Characteristics as a Generator and as

a Motor. Compound DC motor Retardation or Back-to-Back Test. Transformers magnetizing curve No-Load and Short-Circuit Tests of

Transformers. Load Characteristics of Single-Phase and

Three-Phase Transformers. Different connections of three phase

transformers

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Electrical Power / Machines MajorElectrical Technology Department ELE 231 Code Industrial Process Control Course Title

None Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W T

Contacthr/w

30 L 30 W T

Contact hr/sem.

Course Description : This course gives an introduction to the handling,

functioning and applications of programming logic controllers (PLCs). Program writing and editing techniques are covered in detail and applications to real-time processes are also included.

General Goal : This course will enable the student to set up and operate a complete PLC based control system.

Behavioral Objectives : The student must know: The principle of operation of PLC. How to program both basic and advanced functions of a PLC. How to write a complete program, test it and put a simulator or a real process into operation. How to translate a complete control scheme to a simple PLC program. Program using advanced program techniques.



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• Number systems, logic gates and boolean algebra. • Programmable Logic Controller (Principle of function, module description and electrical specification). • Programming languages (STL, LAD, CSF) & applications. • Basic functions (Timers, Counters, flip flops, shift registers, comparators) & applications. • Advanced programming techniques & applications. • Introduction to electro-pneumatic.

J. C. Jewery and W. keith, The PLC Workbook: Programmable Logic Controller MadeEasy – 1993. J. W. Wabb and R.A. Reis, Programmable Logic Controllers : Principles & Applications, 1994.

Textbook:

1. P.Renner, Automation with Programmable Logic Controllers, University of New South Wales, UK 1994.

Additional Reading:

1. C. Simpson, Programmable Logic Controllers, 1993. 2. A. Crispin, Programmable Logic Controller & Their Engineering

Applications, 1990. References:


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The student will be able to:

1. Transform numbers from Decimal system to binary, hexadecimal, octal and BCD systems and vice versa Add numbers in these systems Find out truth table of logic gates Simplify logic equations

Explain the principle of operation of PLC and the role of each module

Know the connection and the electrical specifications of the PLC

Write a statement list Create a ladder diagram Draw Control System Flowchart

Apply with practical examples the use of advanced features such as timers, counters, flip-flops, numbers processing, comparison, jump functions and code field (electric motor control, fans, lighting…)

Know the structure and the elements of a linear step chain

Develop the step chain for the process Transform a step chain diagram to an

instruction list Test the proper functioning of the program Compile a complete standardized

documentation including technological scheme with explanation step chain diagram, statement list and ladder diagram

Know the principle of pneumatics Interpret the symbolic representation know the basics of the distance time

diagram

Number Systems, logic gates and boolean algebra Programmable logic Controller

Principle of function Module description Connections Electrical specifications

Programming languages

Statement list STL Ladder diagram LAD Control System Flowchart CSF

Basic programming functions

Timers Flip Flops Counters Shift registers Comparison Operations Arithmetic Operations Jump functions Code field

Advanced programming techniques

Step chain diagrams from the technological scheme

Instruction list for a step chain diagram Analysis of the process control Documentation and debugging techniques Practical examples

Introduction to electro-pneumatics

pneumatic output devices electro-pneumatic control

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Behavioral Objectives Contents Hrs The student should be able to : Operate the PLC system. And write programs. The student should be able to : Apply the advanced features of the PLC system in various industrial applications such as: speed control, starting and reversing direction of electric motors, control of traffic lights and elevators. The student should be able to : Understand the principle of electro-pneumatics and writes PLC program to test the different electro-pneumatic output devices. The student can also test a faulty process systematically for pneumatic errors, and eliminates the malfunctions.

PLC Universal Applications Simulator: This universal PLC application simulator has been specially developed for basic training on PLC. Traffic Light Module: Model of a traffic system at a main road junction with side road and pedestrian crossing. Stepper Motor Module: Stepper motor with coupled incremental disc. Washing Machine: Module for simulating the control and monitoring of a domestic washing machine. Star/Delta and Contactor Reversing Circuits: Representative of a star / delta rotation reversing circuit. Complete, ready-wired relay with all the necessary lead contactors for connecting a 3-phase induction motor with squired cage rotor. Temperature Control Line Module: Simulation of a temperature controlled oven (resistor with heat sink). Dahlander Circuit: Complete, ready-wired for connecting a three-phase induction motor with a Dahlander winding. Slip Ring Motor Control: Complete ready-wired power relay with all the necessary load contactors for connecting a three-phase induction motor with a 3-stage starter resistance. Motor Control for 3 Speeds: Complete, ready-wired power relay with all the necessary lead contactors and an integrated for 3 speeds: 2 separate windings, one of which is a switchable Dahlander winding. Elevator Model (Lift) 3 Floors:Real model of an elevator with cabin for 3 floors. Solenoid Valve Unit:Solenoid valve unit for driving pneumatic simulation models, by PLC systems. Practice-oriented application model for simulating a complete electro-pneumatic industrial process.

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Electrical Power / Machines MajorElectrical Technology Department ELE 221 Code Power Electronics Course Title

AC Machines Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

2 L 2 W 1 T

Contacthr/w

30 L 30 W 15 T

Contact hr/sem.

Course Description : This course includes a theoretical and practical introduction

to power conversion by means of power electronic devices. Various topologies of power converters are described and studied.

General Goal : This course is designed to provide the student a basic knowledge of power electronic devices and their

applications.

Behavioral Objectives : The student will be able to:

Explain the operating and characteristics of power electronic devices. Implement the power electronic devices in power converter systems such as: controlled and non-

controlled rectifiers, DC-choppers, AC controllers and inverters.



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Introduction to power semiconductors Non controlled rectifier circuits Controlled rectifier circuits DC-Choppers AC-Voltage Controllers Inverters

1. M.H. Rashid, Power Electronics: Circuits, Devices and Applications, 2nd Ed., 1996, Prentice-Hall, Inc., Englewood Cliffs, N.J., U.S.A. ISBN-81-203-0869-7 Textbook:

P,C, Sen, Thyristor DC drives, New York, 1981.

2. B.K. Rose, Modern Power Electronics, IEEE Press Publication, ed. New York, IEEE 1992.

Additional Reading:

1. B.K. Bose, Power Electronics and AC Drives, Prentice-Hall, New Jersey, 1986.

P.C. Sen, Principles of Electric Machines and Power Electronics, John Wiley, 1989.

B.M. Bird, K.G. King, D.A.G. Pedder, An Introduction to Power Electronics, John Wiley &Sons, 1993.

References:


٥٧


Behavioral Objectives Contents Hrs The student should be able to: - explain the characteristics of power semiconductors, their functioning principles and protection methods,

compare the characteristics of the different non controlled rectifier circuit configurations

identify the rating of rectifiers

calculate the average and effective values of currents and voltages in controlled rectifier circuits

explain the effect of an inductive load on the output characteristics

explain the operating principles of a step-down and step-up chopper using power transistors

choose the ratings of a speed drive system for a DC-motor

Introduction to power semiconductors Physics of semiconductors Diodes and their characteristics Application of power diodes Characteristics and functioning of

thyristors, triacs and GTOs Firing and protection methods of thyristors Characteristics and functioning of

transistors Characteristics of power transistors BJT,

MOSFET, IGBT Drive and protection methods of power

transistors

Non controlled rectifier circuits Characteristics of single-phase rectifier

circuits with resistive load Smooth and filter circuits Characteristics of 3-phase rectifier circuits

with resistive load Application

Controlled rectifier circuits Principle of phase control technique Characteristics of single-phase rectifier

circuits with resistive and inductive load Effect of inductive load in single-phase

rectifier circuits Characteristics of 3-phase rectifier circuits

with resistive load Application

DC-Choppers Principle and performance parameters of

step-down chopper using power transistors Principle and performance parameters of

step-up chopper using power transistors Four quadrant DC-chopper Application: Speed drive of DC-motor

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explain the operating principle of AC-controller using phase angle control with resistive and inductive loads

apply a practical example of AC controller system

describe the operating principles of voltage source and current source inverter

explain the pulse width modulation technique

apply a practical example of speed drive circuit for a three-phase induction motor

AC-Voltage Controller Operating principle of AC controller Single-phase bidirectional AC controller

with resistive and inductive loads Application

Inverters Principles of operation Voltage source single-phase and three-

phase inverter using power transistors Sinusoidal Pulse Width Modulation

technique Current source inverter Harmonics reduction Application: Speed drive of three-phase

induction motor.

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Behavioral Objectives Contents Hrs The student should be able to:

1. find out the characteristics of diodes, thyristors, triacs and GTOs from data sheet book find out the characteristics of BJTs,

MOSFETs and IGBTs from data sheet book

draw up and connect the different configurations of non controlled rectifier circuits

measure and compare the characteristics of rectifier circuits with resistive and inductive load

simulate a rectifier circuit using Pspice package

draw up and connect the different configurations of non controlled rectifier circuits

measure and compare the characteristics of rectifier circuits with resistive and inductive load

compare practical and simulation results using Pspice package

put the chopper circuit (step-up and step-down) into operation and measure the current and the voltage of load and power switch.

apply a chopper circuit for speed control a DC-motor.

draw up and connect an AC-voltage controller.

measure the voltage and current as function of phase angle.

draw up, connect and measure the voltage and the current of the load in case of voltage source inverter and current source inverter using resistive load.

measure current and voltage of a three-phase induction motor fed by a voltage source inverter.

analyze the effect of switching frequency on harmonics.

Introduction to power semiconductors Data sheet of diodes Data sheet of thyristors, triacs and GTOs Data sheet of power transistors BJTs,

MOSFETs, IGBTs

Non controlled rectifier circuits Voltage and current of load and switches

in single-phase rectifier circuits: half-wave, full-wave connection with resistive load

Effect of inductive load in single-phase rectifier circuits

Voltage and current of load and switch in three-phase rectifier circuits: half-wave, full-wave connection with R-load

Controlled rectifier circuits using thyristors

Voltage and current of load and switches in single-phase rectifier circuits: half-wave, full-wave connection with resistive load

Effect of inductive load in single-phase rectifier circuits

Voltage and current of load and switch in three-phase rectifier circuits: half-wave, full-wave connection with R-load

DC-Choppers using power transistors Step-up chopper providing higher

controllable DC-output Step-down chopper providing lower

controllable DC-output Application: Speed control of DC-motor

Single-phase AC-Voltage Controller

using thyristors, triacs Phase angle control with resistive load Application: control of light intensity Inverters using power transistors and

GTOs Voltage source inverter Current source inverter Sinusoidal Pulse Width Modulation Reduction of harmonics by increasing the

switching frequency Application: speed drive of three-phase

induction motor

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ELE 201 Code Workshop 1: Electrical Mechanics and Protection Course Title

Pre-Workshop Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

L 6 W T

Contacthr/w

L 90 W T

Contact hr/sem.

Course Description : This practical introduction course focuses on electrical

domestic installations, safety and protection measures and the basic training of mechanical and electrical skills in conjunction with electric machines.

General Goal : The student should be able to plan and carry out domestic electrical installations and mechanical and

electrical work on machines whilst taking into account safety and protection methods.


reads and draws various installation diagrams installs, puts into operation, tests and carries out trouble shooting in domestic installations explains and applies protective measures and safety regulations according to the standards performs basic mechanical and electrical work on electrical machines describes and uses methods of protection for electrical motors



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Topics (Theory & Practice) 1. Basic mechanical skills and workshop safety regulations

(REVIEW topic 0. when necessary!)

2. Domestic Installations • Installation diagrams • Installation techniques and measurements • Installation of various circuits

3. Safety Measures • Fault circuits • Various protective measures (e.g. VDE 0100)

4. Basic mechanical and electrical work on electric machines • Job planning • Assembling and disassembling • Work on machine elements • Tin-soldering and welding • Electrical connections 5. Protection of electrical motors • Components of control circuits • Motor protection methods

TOP 2 and 4: Electrical Power Engineering Proficiency CourseDeutsche Gesellschaft für Technische Zusammenarbeit (GTZ)

Textbook:

Additional Reading:

References:


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Behavioral Objectives Contents Hrs The workshop safety regulations must be applied during all laboratory and workshop courses! The student ... applies the electrical symbols for domestic installations according to standards reads and draws different forms of diagrams for domestic installations

The student ...

handles analogue and digital multimeters in manual and automatic mode with expertise measures electrical properties in electrical installations and derives the measurement errors

The student ...

- determines the working steps necessary for the installation of simple domestic installation circuits selects installation materials from catalogues - lays and fastens cables with clips,lays them on a cable rack, in pipes and ducts - selects wires and cables according to their electrical and mechanical use - determines wiring and cable runs by taking into consideration the local requirements The student … - puts into operation, tests and describes the

0. Basic mechanical skills and Workshop Safety Regulations

(REVIEW topic 0. when necessary!) 1. Domestic Installation • Installation diagrams and measurements - Installation symbols - Constructional drawings - Single line wiring diagram - Installation plan - Multi-line wiring diagram - Schematic wiring diagrams in resolved form - Analogue and Digital Multimeters - Safety precautions with electrical measuring instruments - Display, control buttons and function selector switches - Manual and automatic range - DC and AC Voltages and Currents - Resistance measurement - Errors of measurements • Installation Technique - Working steps - Installation material - Type of Wires and cables - Wire and cable runs - Wire and cable fastener - Cable racks - Pipes and ducts Wire and cable selection CONT.: • Installation Technique - Installation circuits such as: * on/off circuits * series circuit * two-way circuit * intermediate circuit * impulse relais control * circuits with sockets * bell ringing and door opening

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functioning of different installation circuits. - performs systematic fault finding in electrical installations and repairs the faults professionally.

The student ... - describes the effects of voltage, current and frequency on the human body and knows the electrical resistance of the human body explains various possible faults in electrical circuits with the help of diagrams and measures the electrical quantities The student ... distinguishes between protective measures which prevent a dangeres fault voltage and those measures which switch off an electrical installation when a fault occurs recognizes the importance of grounding in case of current leakage - relates safety measures to network configurations tests the effectiveness of safety measures in electrical installation by measuring various electrical quantities such as: dielectric resistance, ground resistance and loop resistance etc. according to the set regulations The student ... - reads and understands technical drawings especially detailed and installation drawings, as well as drawing lists and making sketches according to applicable standards - chooses necessary tools and appliances and keeps them at hand - determines the necessary working steps

2. Safety Measures • Fault circuits - Circuits with faults e.g. insulation fault / short circuit fault / short to ground / fault voltage / contact voltage / fault current / leakage current / direct and indirect contact etc. • Various protective measures Protective measures by insulation - Protective shockproof insulation such as: Solid dielectric insulation / Insulating covering / Insulating lining / Interlayer insulation - Protective low voltage * Ungrounded circuits with voltage rating up to 42 V Protective measures by switching off - Neutral grounding with protective conductor (L1, L2, L3, N, PE) - Ground fault current interruption GFCI protective circuit - Network configuration (TT,IT,TN-C TN-CS) Effectiveness protective measures Loop resistance, dielectric ground resistance, ground resistance, leakage current contact voltage, leakage current, short-circuit current, tripping test for ground, fault circuit interrupters (GFCI`S)

3. Basic mechanical and electrical work on electrical machines

• Job Planning Technical drawings

List of components and devices

Tools and appliances

Working steps

Working time

Material selection

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towards execution and estimates the required working time - chooses appropriate materials and appliances according to instructions with the help of catalogues observes the industrial safety provisions and the trade accident prevention regulations The student ... installs and removes electrical machines - adjusts electrical machines, clutches and belt pulleys - tightens v-belts - installs and removes clutches, belt pulleys and fan blades - dismantles, cleans and reassembles electrical machines - tests, exchanges and greases bearings - drills out screws and recuts threads into the workpiece - assembles parts with screws, nuts and washers and locks the joints with the help of spring washers, shockproof washers The student ... - puts workpieces concentric into the machine and tests them for smooth running - fixes belt pulleys and rotating axles - drills a hole in clutch discs and belt pulleys and fits them with a key seat - repairs the bearing arrangement - produces a sleeve bearing with key way and ring - drills a hole in bearing shells with a friction bodkin by keeping the exact measurement - scrapes areas and bearings to a plane shape - fits parts into plane areas for firm and moving joints - turn off commutators and slip-rings - cleans commutator segments with sawing The student ... - prepares connections for hard soldering and welding

Regulations • Assembling and disassembling

Parts of electrical machines Clutches Pulleys V-belts Fan blades Bearings - Tests, maintenance and repairs • Work on machine elements

Workpiece adjustment

Belt pulleys

Key seat

Sleeve bearing

Bearing shells

Friction bodkin

Commutator and slip-rings

Commutator segments • Tin-Soldering and Welding

Solder and soldering flush Tin-soldering connections

Commutators and Squirrel-cage connections

Welding connections in machines

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- selects solder and soldering flush - performs connections with tin-soldering on squirrel-cage rotors and commutators - produces welding connections of conductors in electrical machines The student ... - prepares power leads and connects electrical machines - attaches connecting components, especially cable lugs, core sleeves and plugs by crimping, screwing and soldering - tests wires and cables for continuity and open circuit - connects electrical machines considering local conditions (cable entry, strain relief, IPxx) - reads terminal diagrams of switches - exchanges mechanical switching devices on electrical machines ( on-off, reversing, star-delta, pole changing switch) - measure the insulation resistance The student ... - reads and draws electrical symbols and circuits for contactor controls according to standards - explains the functioning and specifications of 3 phase switches, contactors, overload breakers, motor protection switches etc.

- determines the working steps for the installation of simple 3 phase motor controls

describes the functioning of contactor control circuits applies multimeters to measure various electrical quantities in contactor The Student … - Installs, tests, performs trouble shooting and describes the functioning of simple contactor control circuits for electrical motors such as:

• Electrical Connections

Power leads

Connecting components : Cable lugs/ core sleeves

Crimping, srewing, soldering

Wire tests

Wiring technique

Terminal diagrams

Switching devices - Insulation resistance

4. Protection of Electrical Motors • Components of control circuits - Symbols for contactor control - 3 phase switches - Contactors - Overload breaker - Motor protection switches etc. • Motor protection method - Electrical motor ON/OFF - Overcurrent relay - Undervoltage relay Overload release - installs, tests, performs trouble shooting and describes the functioning of simple contactor control circuits for electrical motors such as:

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* switching single - and three-phase motors with overcurrent relay and undervoltage relay * controlling motors for on/off with contactors and overload release (bi- metallic temperature sensor)

* switching single - and three-phase motors with overcurrent relay and undervoltage relay * controlling motors for on/off with contactors and overload release (bi-metallic temperature sensor)


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ELE 305 Code WS 3 : Rewinding ElectricalMachines and Interfacing ControlsCourse Title

WS-2: Repair and Control of Electrical Machines Prerequisite

65 4 3 2 1 Semester

3 Credit hr/w

L 6 W T

Contacthr/w

L 90 W

T

Contact hr/sem.

Course Description :

The focal points of this practical course lay on the winding and rewinding of electrical machines, the application of a frequency inverter and a PLC controlled industrial process using electrical motors.

General Goal : The student should be able to wind and rewind various electrical machines, perform job planning, apply

frequency inverters in conjunction with 3-phase induction motors and interface a PLC to an industrial control process using electrical motors as actuators.


• Performs job planning and cost estimation for maintenance and repair • Winds, rewinds and tests electrical motors (dc, ac) and transformers (1- and 3 phase) • Control a 3-phase induction motor using a frequency inverter. • Assembles a plc control of an industrial process with a 3-phase induction Motor • Puts control systems with electrical motors into operation, tests them for proper

functioning and carries out trouble shooting.



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Topics (Theory & Practice) 1. Job planning and cost calculation 2. Rewinding electrical Machines (AC-, DC motors, 1- and 3-phase transformers) • Preparations for rewinding • Rewinding transformers • Rewinding stators • Rewinding rotors • Assembling and testing

3. Industrial frequency inverter for three-phase motors • Parameter setting • Speed drive of 3-phase induction motor

4. PLC control of an industrial process with a 3-phase induction motor • Project planning • Interfacing a PLC with sensors and a 3-phase motor • PLC programming and system testing

TOP 2 and 4: Electrical Power Engineering Proficiency Course Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ)

Textbook:

Additional Reading:

References:


٧٠



The student ...

Selects appropriate technical drawings and circuit documents to perform proper job planning. Plans the necessary working steps and estimates the required working time

Draws up a list of tools and materials needed for maintenance and repair work with the help of catalogues. Selects tools, materials, wires and cables according to the task of work. Draws up a cost estimation and compares it with the real costs when the work is completed. Knows and applies the industrial safety provisions and the trade accident prevention regulations The student ...

Dismantles, tests and cleans rotating electrical machines and determines whether they are repairable. Removes windings and parts of windings. Notes the winding data and the circuit of the electrical machine. Selects insulating material and insulates the laminated core. Calculates the necessary winding data such as:-

1. Different revolutions per unit time. 2. Voltages, currents and frequencies

Determines the size and form of the coils and designs different types of windings. Adjusts the winding machine and winds the coils

1. Job planning and cost calculation Technical drawings Working steps Time consumption for labour Tool and material list for maintenance and repair Cost estimation Industrial safeties and accident prevention regulations 2. Rewinding electrical machines (AC, DC motors, single and 3-phase transformers) Preparations for rewinding

Dismantling electrical machines

Machine data selection

Insulating material

Winding data calculation

Types of windings

Winding machines adjustment

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The student ... Dismantles, tests and cleans transformers and coils and determines whether they are repairable Removes the windings, cleans the coil forms and determines the data of the windings Proofs the winding data by rough calculations makes coil cores and insulation’s Fixes the coil core on to the winding machine and adjusts it Winds coils with and without coil cores,

Using circular and noncircular wires Bandages, soaks and dries the coils Assembles and adjusts transformers and Magnetic coils according to technical Documentation’s Tests transformers for short circuit to frame and short circuit between layers according to technical specifications

The student ... Winds stators with different designs and types of windings and bandages. Connects the windings and assembles the terminal block.

Tests the windings of stators for different winding faults according to technical specifications. Soaks and dries the laminated core and prepares it for assembly. knows and applies the regulations

For the repairing of explosion protected machines The student ...

Winds rotors of different designs and bandages the windings. Assembles commutators and sliprings and connects the windings. Tapes with binding wire and ribbon bandages. Performs the balancing procedure for rotors.

Rewinding transformers and coils Transformer dismantling Windings calculation Coil cores Circular and non-circular wires Coil treatment Assembly of coils Winding faults Rewinding stators Types of windings Terminal blocks Shorted windings Short circuits to frame Phase to phase short circuit Continuity of windings Laminated core Safety regulations Rewinding rotors Rotor windings Connections of windings Wire treatment Rotor balancing Winding faults Laminated cores


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Tests the windings for short circuits to frame, interwinding fault, phase to phase short circuit and continuity according to instructions. Soaks and dries the laminated core and prepares it for assembly.

The student … Assembles the repaired and maintained parts of electrical machines carries out test runs and checks the performance of the electrical machine Fills out inspection record files with the measured test data Determines the material consumption, required working time and calculates the repair costs

Compares estimated and real costs of repair

The student … Explains the technical data of an industrial frequency inverter and distinguishes between the power circuit and the control circuit Carries out various parameter settings on an industrial frequency inverter Performs the parameter setting by means of pushbuttons and LED display or via bus interface using a PC

The student … Handles the frequency inverter and knows how to apply it for practical applications with the help of technical documentation Sets the parameter of a frequency inverter for a speed drive control of a 3 phase induction motor Connects the circuit for the speed drive control and puts it into operation Tests the circuit for proper functioning and

Performs trouble shooting if necessary

Assembling and testing Assembly Test run Inspection sheets Repair costs 3. Industrial frequency inverter Parameter settings Technical data Power circuit and control circuit Operational parameter Protection parameters Drive parameters Parameter pushbuttons or PC setting Speed drive of 3 phase induction motor Frequency inverter handling Speed drive control setting Circuit connection Testing and trouble shooting 4. PLC control of an industrial process with a 3-phase induction motor Project planning Projects such as:


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The student ... Selects a technical control problem as a project to be solved. Carries out the project planning by using different components such as a PLC, digital sensors, 3phase induction motor etc. The student ... Distinguishes between parallel and serial data exchange Assembles a practical control circuit with a PLC, sensors and a 3phase motor Applies the conventional parallel wiring system or the modern serial data exchange method for interfacing sensors and actuators to the PLC

The student ... Programmes and tests the PLC programme for proper functioning Connects the control system, installs and handles the PLC programme Puts the system into operation and performs system adjustments Tests the system for proper functioning and performs systematically trouble shooting if necessary Carries out an overall documentation of the control system

Lift control Conveyer belt Packing machine etc…. Interfacing a PLC with sensors and a 3- phase induction motor Parallel and serial data exchange Conventional external parallel wiring system Modern serial data exchange PLC programming and system testing PLC programmes System installation System adjustments Trouble shooting Documentation

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