w.e.

f Academic Year 2012-13 G Scheme

Course Name : Electronics Engineering Group.

Course Code : DE/ED/EI/EJ/EN/ET/EV/EX/IC/IE/IS/IU/MU
Semester : Third
Subject Title : Electrical Engineering
Subject Code : 17318
Teaching and Examination Scheme

Teaching Scheme Examination Scheme

PAPER
TH TU PR TH PR OR TW TOTAL
HRS
03 -- 02 03 100 -- -- 25@ 125

NOTE:
Two tests each of 25 marks to be conducted as per the schedule given by MSBTE.
Total of tests marks for all theory subjects are to be converted out of 50 and to be entered in
mark sheet under the head Sessional Work. (SW)

Rationale:
The basic concepts of electrical engineering are covered in the subject Elements of
Electronics Engineering in the second semester. Electrical Engineering subject is designed for
second year diploma course in Electronics Engineering group. The subject covers analysis of ac
networks, working principles and characteristics of various drives. The subject includes various
safety rules, methods and equipments used for system and operation. The basic concepts studied
in this subject will be very useful for understanding of Power electronics and electronic drives of
electronics course.

Objectives:
The students will be able to
1. Understand single phase and three phase AC circuits.
2. Realize concept of electromagnetic induction and apply it to static and rotating machines.
3. Understand characteristics of rotating machines.
4. Know the importance of safety and various safety methods in electrical engineering.

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Learning Structure:

Performance of transformer, machine, Calculate Series circuit & parallel

Applications circuit.

To solve To solve Three Operation & Operation &

Procedure Single phase phase balanced performance performance
Series circuit Circuits of Transformer of Machines
& parallel

A.C. Series Polyphase Electromagnetic induction, self &

circuit & Circuit mutually induced emf, Lenzs law,
Principle parallel circuit Faradays laws

Concept Electromagnetism, Single phase,

three phase supply system.

Facts Various parameter of electrical network, ohms law, kirchoffs law, transformer, AC
machines.

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Content Theory:
Topic Hours Marks
Topic 1 : AC Fundamentals
Specific Objectives :
Compare AC and DC system.
Meaning of various terms related to AC system.
Distinguish Various AC circuits and Understand rules and
procedure to draw vector diagrams for the same.
To realize concept of various resonance parameters and plot the
graph.
Contents :
Difference between A.C. and D.C. quantity
Advantages of A.C. over D.C.
waveform of sinusoidal A.C. cycle
Generation of single phase A.C. by elementary alternator
Definitions: instantaneous value, cycle, amplitude, time period,
frequency, angular frequency, R.M.S. value, Average value for
sinusoidal waveform, Form factor, Peak factor (no derivation , simple
numerical on it)
Phasor representation of sinusoidal A.C. quantity, review of phasor 14 30
algebra, representation of A.C. quantity in rectangular.
Phase angle, phase difference, concept of lagging and leading by
waveforms, mathematical equations and phasors.
Pure resistance, inductance and capacitance in A.C. circuit
waveforms, equations and phasor diagram (no derivation)
Concept of impedance and impedance triangle.
Power active, reactive and apparent, power triangle.
Power factor and its significance.
R-L, R-C and R-L-C series circuit phasor diagram, voltage and
current equations.
Simple numerical on R-L, R-C and R-L-C series circuit.
Resonance in R-L-C series circuit: Conditions for resonance, graphical
representation of resonance curve, resonant frequency, bandwidth and
Q factor of series resonant circuit.
Resonance in parallel circuit, resonant frequency and Q factor, nature
of resonance curve (No derivation &no numerical)
Topic 2: Polyphase Circuits
Specific Objectives :
Compare three phase and single phase system.
Define various terms related to three phase system.
Interpret relations between line & phase values of current, voltage,
power& power factor of star & delta connected systems.
Contents :
Advantages of 3 phase system over 1 phase system 06 12
Principle of 3-phase e.m.f. generation and its waveform
Concept of phase sequence
Balanced and unbalanced load
Relation between phase and line current, phase and line voltage in Star
connected and Delta connected balanced system. (no derivation)
Calculation of current, power, power factor in a 3 phase balanced

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system (simple numerical)

Topic 3 : Electromagnetic Induction
Specific Objective :
Realize the concept of self and mutually induced EMF.
Interprete Faradays laws of electromagnetic induction.
Contents :
Relation between Magnetism and Electricity.
Production of Induced E.M.F. and Current.
04 08
Faradays Laws of Electromagnetic Induction.
Flemings Right Hand Rule
Lenzs Law
Induced E.M.F: Self Induced E.M.F., Mutually Induced E.M.F.,
direction of Induced E.M.F. and Currents.
Energy Stored in Magnetic Field
(No Derivation and No Numerical)
Topic 4: Single Phase Transformer
Specific Objective :
Draw construction diagram and explain working principle of
single phase transformer.
Interprete the relationship between various parameters of
transformers.
Compare autotransformer & two winding transformer
Contents :
Construction and working of transformer, classification , brief
description of each part, its function
(power transformer, audio frequency transformer, radio 06 16
frequency transformer, isolating transformer, pulse
transformer, intermediate frequency transformer)
Significance of Emf equation (no derivation)
Voltage ratio, current ratio and transformation ratio.
KVA rating of a transformer
Losses in a transformer
% efficiency & % regulation
Auto transformer comparison with two winding transformer,
Applications
Simple numerical on this topic
Topic : 5 : Three Phase Induction Motor
Specific Objectives :
Realize construction principle of working & types of three phase
induction motor.
Identify speed torque characteristics.
Use of variations in voltage, current and frequency for speed
control of motors.
Contents: 08 16
Construction and principle of working
Types Squirrel cage and slip ring
Synchronous speed, slip speed, slip and rotor frequency (no numerical)
Torque speed characteristics
Necessity of starter
Basic concepts of speed control method using thyristor.

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Revesal of rotation of 3 phase induction motor.

Topic : 6 Fractional Horse Power Motors
Specific Objectives :
Draw Schematic representation, Principle of working ,
characteristics and applications of
i) Single Phase Induction Motor
ii) Universal Motor
iii) Stepper Motor
iv) Servo Motor
Contents : 08 12
Schematic representation, principle of operation and applications of the
Split phase single phase induction motors.
Universal motor - Schematic representation principle of operation,
reversal of rotation and applications
Stepper motor - Schematic representation types, principle of working
and applications
Servo motor - Schematic representation types, principle of working
and applications
Topic 7 : Electrical Safety
Specific Objectives :
Understand and reproduce use of safety equipments
Contents :
Study of different accessories like MCCB, ELCB, cables and wires
02 06
used in domestic and commercial electrical wiring.
Use of megger as earth tester.(front panel diagram & different control
terminals)
Necessity of earthing and list its types.
Electrical safety
Total 48 100

Practical:
Skills to be developed:
Intellectual Skills:
1. Identify various types of Machines.
2. Select Instruments and their ranges.

Motor Skills:
1. Draw machine characteristics.
2. Make proper connection.
3. Accuracy in measurements.

List of Practicals:
1. Know your electrical laboratory.
2. Determine the resistance, inductance and impedance of choke coil by observing its
response to A. C. and D. C supply.
3. Draw the phasor diagram and determine the power factor of R-L-C series circuit.

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4. Verify the relationship between line and phase values of voltages and currents in three
phase balanced star and delta connected load.
5. Identify the type of transformer based on the transformation ration of single phase
transformer.
6. Determine Efficiency and single phase transformer at no load, half load and full load by
conducting load test.
7. Determination of slip of three phase induction Motor by tachometer method and
observation of variation in speed to change in supply voltage.
8. Reversal of direction of rotation of single phase induction motor.
9. Measurement of insulation resistance using megger.
10. Study of different types of Cables and switches.
11. Mini project which includes connection of switch, holder, plug socket, fuse and indicator.

Learning Resources:
Books:

Sr.
Author Title Publisher
No
Electrical & Electronics
1 Hughes Pearson
Technology
Tata McGraw Hill, New
2 Mittle & Mittal Basic Electrical Engineering
Delhi
Electrical Technology Vol- I & S.Chand Publications
3 B.L. Theraja
II Delhi
V. K. Mehta, Rohit S.Chand Publications
4 Basic Electrical Engineering
Mehta Delhi

Websites: www.housestuff.com

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