BASIC ELECTRICAL ENGINEERING

2014 Scheme

Subject Code: 14ELE15/14ELE25

IA Marks: 25

Hours/Week: 04

Exam. Hours: 03

Total Hours: 50

Exam. Marks: 100

Module – 1

1a. D.C.Circuits : 

Ohm’s Law and Kirchhoff’s Laws, analysis of series, parallel and series- parallel circuits excited by independent voltage sources.

Power and Energy. Illustrative examples.

1b. Electromagnetism :

Review of field around a conductor, coil, magnetic flux and flux density, magnetomotive force and magnetic field intensity, reluctance and permeability, definition of magnetic circuit and basic analogy between electric and magnetic circuits. 5 Hours

Electromagnetic induction :

Definition of Electromagnetic Induction, Faradays Laws, Fleming’s right hand rule, Lenz’s Law, Statically and dynamically induced emf. Concept of self-inductance, mutual inductance and coefficient of coupling. Energy stored in magnetic field. Illustrative examples. Force on current carrying conductor placed in a magnetic field, Fleming’s left hand rule. 5 Hours

Module – 2

2a. D.C.Machines : 

Working  principle of  D.C.Machine  as  a  generator and   a  motor. Types  and  constructional  features.  Types  of  armature windings, Emf equation of generator, relation between induced emf and terminal voltage with an enumeration of brush contact drop and drop due to armature reaction. Illustrative examples, neglecting armature reaction. Operation of D.C. motor, Back emf and its significance, torque equation. Types of D.C. motors, characteristics and applications. Necessity of a starter for D.C. motor. Illustrative examples on back emf and torque. 7 Hours

2b. Measuring Instruments : 

Construction and Principle of operation of dynamometer type wattmeterand single phase induction type energy meter. 3 Hours

Module – 3

3a. Single-phase A.C. Circuits :

Generation of sinusoidal voltage, frequency of generated voltage, definition and numerical values  of  average  value, root  mean  square  value,  form  factor  and  peak  factor  of  sinusoidally varying voltage and current, phasor representation of alternating  quantities. Analysis, with phasor diagrams, of R, L, C, R-L, R-C and R-L-C circuits and, parallel and series- parallel circuits. Real power, reactive power, apparent power  and  power  factor.  Illustrative examples.                             7 Hours

3b. Domestic Wiring :

Service mains, meter board and distribution board. Brief discussion on concealed conduit wiring. Two-way and three-way control.   Elementary discussion on Circuit protective devices: fuse and Miniature Circuit Breaker (MCB’s). Electric shock, precautions against shock –Earthing, Earth leakage circuit breaker (ELCB) and Residual current circuit breaker (RCCB).  3 Hours

Module – 4

4a. Three Phase Circuits : 

Necessity  and  advantages  of  three  phase systems, generation of three  phase  power.  Definition of Phase  sequence, balanced supply  and  balanced  load.  Relationship between line and phase values of balanced star and delta connections. Power in balanced three- phase circuits, measurement of power by two-wattmeter method. Determination power factor using wattmeter readings. Illustrative examples.
6 Hours

4b. Three PhaseSynchronous Generators :

Principle of operation, Types and constructional features, Advantages of rotating field type alternator, Synchronous speed, Frequency of generated voltage,Emf equation. Concept of winding factor (excluding the derivation of distribution and pitch factors). Illustrative examples on emf equation.                                                4 Hours

Module – 5

5a. Single Phase Transformers :

Necessity of transformer, Principle of operation and construction of single-phase transformers (core and shell types).  Emf equation, losses, variation losses with respect to load, efficiency, Condition for maximum efficiency, Voltage regulation and its significance (Open Circuit and Short circuit tests, equivalent circuit and phasor diagrams are excluded).  Illustrative problems on emf equation and efficiency only.                                                                                   6  Hours

5b. Three Phase Induction Motors :

Principle of operation, Concept and production of rotating magnetic field, Synchronous speed, rotor speed, Slip, Frequency of the rotor induced emf, Types and Constructional features. Slip and its significance. Applications of squirrel - cage and slip - ring motors. Necessity of a starter, starting of motor using stars-delta starter. Illustrative examples on slip calculations.                                          4 Hours

Course Outcomes :

After studying this course, students will be able to:
•  Understand electrical circuit concepts
•  Understand electromagnetic and electromagnetic induction
•  Understand DC Machines
•  Understand single and three phase circuits, and
•  Understand generators and motors.

Scheme of examination :

•  Two full questions (with a maximum of four sub questions) of twenty marks each to be set from each module. Each question should cover all contents of the respective module.
•  Students have to answer  five full questions choosing one full question from each module

Text Books :

1.  D.C. Kulshreshtha, “Basic Electrical Engineering”, TMH, Revised First Edition.
2.  E.Hughes, “Electrical Technology”, International Students 9th  Edition, Pearson, 2005.
3.  Rajendra Prasad, “Fundamentals of Electrical Engineering”, PHI, Third Edition, 2014.

Reference Books :

1.  AbhijitChakrabarti,  Chandan  Kumar  Chanda,  Sudiptanath,  “Basic Electrical  Engineering”, TMH, First Edition.
2.  B.L.Theraja, “Fundamentals of Electrical Engineering and Electronics”, S.Chand & Company Ltd, Reprint Edition 2013.

All the Best ..!!