(electric networks) Course Catalogue 2019-2020

Directorate of Quality Assurance and Accreditation خشین‌به‌تی‌دڵنیایی‌جۆری‌و‌متمانه‌رایه‌به‌ڕێوه‌به

(electric networks) Course Catalogue

2019-2020

institute Erbil Technology Institute

Department Electricity

Module Name Electric network

Module Code ELI204

Semester 2

Credit 7

Module type Core

Weekly hours See attached

Weekly hours (Theory) ( 3 )hr Class ( )hr Workload

Weekly hours (Practical) ( 2 )hr Class ( )hr Workload

Lecturer (Theory) Ssrdar Mohammad Saeid

E-Mail [email protected]

Lecturer (Practical) Harbi waso kader

Email harbi. kader @epu.edu.iq

Course Book


Keywords Understanding the basic components of electrical structures, identification of conductors, insulators, semiconductors, medium and low voltage systems, magnetic forces, types of magnetic materials, circuit breaker systems, and how to equip the consumer with electric power. With an introduction to how to erect electrical boards.

Course overview: 1. Understanding the basic components of electrical installation. 2. Understanding the material types according to electrical conductivity: conductors, insulators, and

semiconductors. 3. Understanding types of magnetic materials, magnetic forces, medium and low voltage systems. 4. Understanding circuit breaker systems and how to equip the consumer with electric power. 5. Understanding how to connect lamps in series and parallel and connect electricity of houses and large

buildings. 6. Establishment of a staircase with a two-way switch and the identification of the middle keys with the

electric bell of various kinds and the electric counters 7. Understanding the general classification of electric machines.

Course objective: Understanding the basic components of electrical structures, identification of conductors, insulators, semiconductors, medium and low voltage systems, magnetic forces, types of magnetic materials, circuit breaker systems, and how to equip the consumer with electric power with general classification of electric machines. With an introduction to how to erect electrical boards.

Student's obligation The student should be aware of the commitment to the formal attendance and attendance during the lecture, and to clarify the extent to which this material is useful in the future of the practical student, with how to distribute the grades for the theoretical and practical subjects, how to conduct the daily exam for the material and how to put questions with the student's participation in the discussion.

Forms of teaching 1 - Explanation of the articles of the foundations on the data shows. 2 - Clarification of the article for each lecture on the white board. 3. Students can download lectures in university website. 4- Provide explanation with full explanation of mathematical equations

Assessment scheme

Exam Theoretical Practical Mid Term 6 10

Report 7

lab Reports 14

quizzes 4

homework 10

ceminars 7

Attendance 2

Total for year work 60

Final exam 15 25

Total 100


Student learning outcome: The student learns how to connect and install houses, buildings and how to connect types of electrical lamps and learn how to providing the consumer with electric power from the main stations, and benefit from this course to understanding the electrical motors and D.C type generators and how to install electrical residential houses.

Course Reading List and References‌: Key references:

1. A.J. Watkins, C. Kitcher, “Electrical Installation Calculations “, eighth edition. 2. Trevor Linsley, “ Introduction To Electrical Installation Work “ 3. Trevor Linsley, “Basic Electrical Installation Work”, level 2, fifth edition. 4. Brian Scaddan, “Electrical Installation Work “, sixth edition. 5. Trevor Linsley, “Advance Electrical Installation Work “level 3, fifth edition.

▪ Useful references: 1. “Basic Electricity “, CONTINUING EDUCATION PROFESSIONAL DEVELOPMENT COURSE. 2. Kristover Kicher, “Practical Guide to Inspection, Testing and Certification of Electrical Installations “,

third edition. 3. Step by step Guide Book on “Home Wiring “.

▪ Magazines and review (internet): www. Qurya.com ,www.electrical insulation.com


The Topics: Lecturer's name

Theory sardar mohammad saeid

No. Of Weeks Description

1

Students learn the vocabulary of scientific approach to material sources of textbooks. SI- Derived units. SI- Prefixes and Symbols and safety Precautions. Types of materials according to electricity connection, Conductors, insulators and semiconductor materials. Energy band structure

2 Types of materials according to electricity connection, Conductors, insulators and semiconductor materials. Energy band structure

3 Definition of electricity, basic types of electrical energy. Colour Coding of Wires, Cables color code for Single and Three phases, Cables and Conduit, Wire Sizes.

4

afety Equipment, Common Electrical Units used in Formulas and Equations and common

symbols. Insulating materials examples of air insulation material oil and its uses Temperature

Classes of Electrical Insulators.

Ohm’s Law, Resistivity, Conductivity, Relationship between Resistivity and Conductivity,

Resistance Temperature coefficient of Resistance (α),

5

Magnetic properties of materials Magnetic forces. Types of magnetic materials. Magnetism

terms. and laws related to magnetism.

Magnetic flux, flux density, magnetic motive force, magnetic field strength, permeability, relative permeability, reluctance

6 Electricity supply systems, steps of electrical energy from the generation stations until it reaches the consumer.

7

Definition of Fuses and types of fuses.operation

8 Circuit breaker, types of circuit breaker, basic differences between fuses and circuit breaker.

9

Wiring systems, types of wiring systems, cleat wiring, wooden casing and capping wiring. C.T.S or

T.R.S wiring, metal sheathed wiring, conduit wiring.

10

Electrical power cable, rating of power cables, construction of power cables, types of cables, classification of cables Earthling system, applications of earthling system, earthling conductors, earthling electrodes.

11

Earthling system, applications of earthling system ,Earthling conductors, earthling electrodes.

12

Theory of single and three phase electrical power counter.


The Topics: Lecturer's name

PRACTIC HARBY WASO KADER

No. Of Weeks Description

1 Course book , safety precautions

2 One lamp controlled by one switch. One bell controlled by one push switch. Installation a ceiling Fan with a dimmer switch.

1.

3 Two-way lamp switch control (staircase). Three-way lamp switch control (intermediate switch

4 Connection of a single-phase power meter (KWH) to a specific load through a plat distribution. Three phase (kWh) meter connection and installation.

5 Controlling a lamp by a contactor.

Controlling a single phase motor by a using thermal relaywith increasing current. Controlling the operation of a three-phase inductive motor by using a thermal

relay when increasing current.

6 Operating a lamp for a specified time using relay and timer(traffic light ).

7 Rotary switch application in control systems manually for inversing the

directions for the same load.(manual)

Inversing the direction of motors automatically by contactor and timer.

8 star/delta connection& application of three phase induction motor using

contactors manually

star/delta connection& application of three phase induction motor using

contactors and timer automatically.

9 Automatic opening and closing of a garage door using limit switch

10 Electric hist (crane) operation

11 Automatic Changeover using contactor.

12 Starting ond stopping a single phase motor automatically

Starting serval motors automatically in sequence.


Typical Answers of Electrical Installation an Machines

1st stage 1st Attempt 2017-2018

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Q1/

1. Conductors, Insulators, and Semiconductors.

2.

3.

i) Field system.

(ii) Armature core.

(iii) Armature winding.

(iv) Commutator.

(v) Brushes.

4.

Advantage of HBC fuses:

1. They have no mechanical moving parts.

2. The declared rating is accurate.

3. The element does not weaken with age.

4. Their operation is very rapid under fault conditions.

5. They are capable of breaking very heavy fault currents safely.

6. They are capable of discriminating between a persistent fault and a transient fault such as the large starting

current taken by motors.

7. It is difficult to insert an incorrect size of cartridge fuse since different ratings are made to different physical sizes.


Disadvantage of HBC fuses:

They are very expensive compared to semi-enclosed fuses.

Q2/A/

Terminal voltage, V = Ia RL = 8 × 60 = 480 V

Generated e.m.f., Eb = V + Ia Ra = 480 + 8 × 1 = 488 V

Q2/B/

R₂ = 𝑅₁(1+𝛼𝑡2)

(1+𝛼𝑡1) =

250(1+0.0045×500)

(1+0.0045×25) =

250(3.25)

(1.1125) = 730.337 Ω

Q3/A/

1. Magnetic field strength: H =N I

ℓ=

350×2

25×10−2 = 2800 A/m

2. For a non-magnetic material μr = 1, thus flux density

B = μ₀H⟹ B = 4π ×10⎺⁷×2800 = 3.5168 mT

3. Total magnetic Flux (Φ) = BA = (3.5168×10⎺³)(1.5×10⎺⁴)

= 0.52752 μWb

Q3/B/

Output power = kVA × p.f = 100 kVA × 0.8 = 80 kW

Η =Output Power

Input Power=

Output Power

OutputPower+Losses=

80 kW

80 kW+1 kW

= 0.987 = 98.7%

Q4/A/


Q4/B/

1. Power= √3 VL IL cosθ ⟹ IL =Power

√3 VL cosθ=

25000

1.723×400×0.89= 40.544 A

2. For delta connection: IL = √3 IP ⟹

Ip =IL

√3=

40.544

1.723= 23.4 A

Q5/A/


Q5/B/

1. The prospective fault current.

2. The circuit load characteristics.

3. The current carrying capacity of the cable.

4. The disconnection time requirements for the circuit.

Q5/C/


Extra notes: The use of new technologies and tools such as video conferencing, smart board and visiting sites, helps greatly students to development of science and understanding lectures rapidly. peer review: this course book has been reviewed by Mr. abubaker aziz ahmed .He taught this subject earlier and he agreed on this syllabus.

(electric networks) Course Catalogue 2019-2020

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