CENTRAL INSTITUTE OF TECHNOLOGY ... - CIT, Kokrajhar...

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Oct 7, 2013 (3 years and 10 months ago)

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CENTRAL INSTITUTE OF TECHNOLOGY KOKRAJHAR(Centrally
Funded Institute under MHRD, Govt. of India, Approved by
AICTE)BODOLAND TERRITORIAL COUNCIL :: KOKRAJHAR ::
ASSAM :: 783370


ALLIED ENGINEERING
ELECTRICAL
BRANCHE SYLLABUS

Electrical Machine (IE 401) for Degree IE 4
th

Semester:
Basic concept of rotating
machines:
General working principle and constructional features.
-

Type of windings
-

generation of voltage, production of torqu
e
D.C. Machines
Constructional details


emf
equation


Methods of excitation


Self and separately excited generators


Characteristics of series, shunt and compound generators

Principle of operation of
D.C. motor


Back emf and torque equation


Charact
eristics of series, shunt and
compound motors
-

Starting of D.C. motors


Types of starters
-
Testing, brake test and
Swinburne‘s test


Speed control of D.C. shunt motors.
Transformers:
Constructional
details


Principle of operation


emf equation


Trans
formation ratio


Transformer
on no load


Parameters referred to HV/LV windings


Equivalent circuit


Transformer
on load


Regulation
-

Testing


Load test, open circuit and short circuit tests.

Single
phase motors:
Principle of working
-
double revolving

theory, starting characteristics
and application of single phase motor and universal motor.
Induction Motors
Construction


Types


Principle of operation of three phase induction motors


Equivalent circuit


Performance calculation


Starting and speed
control

Single phase
induction motors.
Synchronous and Special Machines
Salient pole and cylindrical rotor
machines. Synchronous generator, distribution and coil span factors, E.M.F. equation.
Salient pole generator phase diagram. Synchronous motor


prin
ciple of working,
phasor diagram, v
-
curves, starting. Synchronous condenser and power factor
improvement.


Reluctance motor


Hysteresis motor


stepper motor.

Basic Electrical Engineering(EE 201) for Degree 2
nd

Sem all branch:


DC Networks
: Definitions

of active, passive, linear, non
-
linear circuit elements and networks.
Kirchoff’s laws. Nodal and mesh analysis. Voltage and current sources. Network theorems


superposition. Thevenin’s, Norton’s and maximum power transfer.

Single Phase AC Circuits
: Wavef
orms of alternating voltages and currents, instantaneous, averages
and rms values, form factor and peak factor, forms of representation of alternating quantities, concept
of phasor and phasor diagrams, concept of lead and lag, reactance and impedances, AC
circuits


resistive, inductive, capacitive, R
-
L, R
-
C and R
-
L
-
C series, parallel and series
-
parallel combinations,
impedance triangle, admittance, active and reactive power and power factor.


Magnetic Circuits
: Definition of mmf, flux, flux
-
density and rel
uctance, comparison between
electric and magnetic circuits, series, parallel and series
-
parallel circuits and their solutions, energy
stored in magnetic circuit, lifting magnets, electromagnetic induction, self and mutual inductance,
hysteresis and eddy cu
rrent losses.



Three Phase AC Circuits
: Concept of three
-
phase AC, connections, phase and line values in star and
delta connections, solution of simple 3
-
ph balanced circuits with resistive and reactive loads, 3
-
ph
power, phase sequence.


Instruments
: Cla
ssification of instruments, essentials of indicating type instruments


deflecting
CENTRAL INSTITUTE OF TECHNOLOGY KOKRAJHAR(Centrally
Funded Institute under MHRD, Govt. of India, Approved by
AICTE)BODOLAND TERRITORIAL COUNCIL :: KOKRAJHAR ::
ASSAM :: 783370


torque, controlling torque, damping, types of indicating instruments, MC and MI type ammeters and
voltmeters, extension of range
-
use of shunts and multiplier, errors and com
pensation.


Basic of Electrical Installations
: Wirings, types of cables, types of wiring; circuit layouts


single
-
phase AC mains to DB; 3
-
ph connections; fuse, MCB etc. Testing of a wiring installation, the
Megger; Earthing
-

purpose and methods; Indian El
ectricity Rules regarding electrical installation.



Electrical Machines and Control(CAI
-
402) for Diploma CAI 4
th

Semester:


1.

Three
-
Phase Supply:

Advantage of three
-

phase system over single phase system.
Star
-
delta connections, relation between phase an
d line voltage and currents in a
three phase system, Power and power factor in three phase system and their
measurements.

2.

Transformers:

Principle of operation and constructional details, Single phase and
three
-

phase transformers, core type and shell type
transformers, difference
between single phase and three phase transformers, advantages and
disadvantages. Voltage regulation of a transformer, Losses in a transformer,
efficiency, condition for maximum efficiency and All
-
Day efficiency, Auto
Transformers a
nd Instruments Transformers, CTs and PTs.

3.

Introduction to Rotating Electrical Machines:

E.M.F. induced in a coil rotating in a
magnetic field, definition of motor and generator, basic principle of a generator
and a motor, torque due to alignment of two mag
netic fields and the concept of
torque angle. Basic electromagnetic laws, common features of rotating electrical

machines.

4.

DC machines:
Principle of working of DC motors and DC generators, their
constructional details, function of the commutator for motori
ng and generating
action, Armature winding. Factors determining induced e.m.f., factors determining
electromagnetic torque.

Armature reaction and its compensation. Action and
relationship between terminal voltage and induced e.m.f., factor determining the
speed of a DC motor. Different types of excitation. Performance and characteristics
of different types of DC machines. Starting of DC machines, motors and starters.
Applications of DC machines.

5.

AC Motors:
Brief introduction about three
-
phase induction moto
rs, its principle of
operation, types of induction motors and constructional features of squirrel case
and slip ring motors. Starting and speed control, star
-
delta and D.O.L. (direct on
line) starters. Reversal of direction of rotation of three
-
phase induc
tion motors.

6.

Applications of induction motors:
Synchronous Machines, Synchronous
Generators, Synchronous Motors and their applications.

7.

Single phase and Fractional Kilowatt Motors:
Introduction, principle of operation
of single phase motors, types of singl
e phase induction motors and their
constructional details, (i.e. split phase, capacitor start, capacitor start
-
capacitor
run, shaded pole & reluctance start). Single phase synchronous motors
-

reluctance
CENTRAL INSTITUTE OF TECHNOLOGY KOKRAJHAR(Centrally
Funded Institute under MHRD, Govt. of India, Approved by
AICTE)BODOLAND TERRITORIAL COUNCIL :: KOKRAJHAR ::
ASSAM :: 783370


motor (hysteresis motor). Commutator type single phas
e motor
-
Repulsion
Induction motor, shaded pole motors, AC series motor & universal motors.
Introduction to servo
-
motors & stepper motors.

Substation, Switchgear and Protection(CAI
-
3204) for Diploma CAI 6
th

Semester:



UNIT


I
Substation


definition,

classification, criterion for site selection,
substation equipment Bus bar


definition, classification


UNIT


II

Neutral grounding


definition & difference from equipment
grounding, disadvantage of neutral ungrounded system, types of
neutral grounding,

criterion for neutral ground practice. Earthing &
Transformer


UNIT


III

Introduction to symmetrical components & symmetrical faults,
Relays


classification basic working principle of electromagnetic &
introduction relay.


UNIT


IV

Introduction to stat
ic relays, Application & phase comparator, Basic
principles of o/c relays, direction relays distance relays, differential
relays.


UNIT


V

Apparatus protection, Transformer protection, Motor protection,
Alternator protection, circuit breakers working prin
ciple, Arc
interruption theory, Auto reclosing, Types of CB & its relative
advantages & disadvantages.



Electrical Circuits and Networks(El
-
401) for Diploma 4
th

Semester:


1.

Fundamental Concept:
Concept of current, voltage, resistance, capacitance,
induct
ance and circuit parameters.

2.

Circuit Theorem:

Statement and applications of ohm’s law, Kirchhoff’s law,
Thevenin’s theorem, Nortons theorem, Maximum Power Transfer theorem,
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-
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Direct curre
nt circuit:

Series, parallel, series
-
parallel circuit of resistance with
problems, division of current in parallel circuit and problems.

4.

AC series circuits:

Alternating current fundamentals, equations of alternating
voltages and currents, R
-
L, R
-
C, R
-
L
-
C s
eries circuits, resonance in R
-
L
-
C series
circuits. Polar and Cartesian representation (j
-
operation).

5.

AC parallel circuit:
Solving parallel circuits by vector methods, admittance method
CENTRAL INSTITUTE OF TECHNOLOGY KOKRAJHAR(Centrally
Funded Institute under MHRD, Govt. of India, Approved by
AICTE)BODOLAND TERRITORIAL COUNCIL :: KOKRAJHAR ::
ASSAM :: 783370


and complex algebra method. Resonance in parallel circuits.

6.

Three
-
phas
e circuits:

Operational characteristics of three phase system, principle
of three phase generation of power, star
-
delta connection, relation of current,
voltage and power.

7.

Transients:

Fundamental concept of transients, oscillating circuit, natural
frequenc
y, forced frequency.

8.

Class Test.