PAPER CODE – 100101 || 100201
|
ESC |
BASIC ELECTRICAL
ENGINEERING |
L:3 |
T:1 |
P:2 |
CREDIT:5 |
MODULE 1: DC CIRCUITS (8 LECTURES)
ELECTRICAL CIRCUIT ELEMENTS (R, L AND C), VOLTAGE AND CURRENT SOURCES, KIRCHHOFF CURRENT AND VOLTAGE LAWS, ANALYSIS OF SIMPLE CIRCUITS WITH DC EXCITATION. STAR-DELTA CONVERSION, NETWORK THEOREMS (SUPERPOSITION, THEVENIN, NORTON AND MAXIMUM POWER TRANSFER THEOREMS). TIME-DOMAIN ANALYSIS OF FIRST- ORDER RL AND RC CIRCUITS
MODULE 2: AC CIRCUITS (8 LECTURES)
REPRESENTATION OF SINUSOIDAL WAVEFORMS, PEAK, RMS AND AVERAGE VALUES
(FORM FACTOR AND PEAK FACTOR), IMPEDANCE OF SERIES AND PARALLEL CIRCUIT,
PHASOR REPRESENTATION, REAL POWER,
REACTIVE POWER, APPARENT
POWER, POWER FACTOR,
POWER TRIANGLE. ANALYSIS OF SINGLE-PHASE AC CIRCUITS CONSISTING OF R, L,
C, RL, RC, RLC COMBINATIONS (SERIES AND PARALLEL), RESONANCE. THREE-PHASE
BALANCED CIRCUITS, VOLTAGE AND CURRENT RELATIONS IN STAR AND DELTA CONNECTIONS.
MODULE 3: MAGNETIC CIRCUITS: (4
LECTURES)
INTRODUCTION, SERIES AND PARALLEL MAGNETIC
CIRCUITS, ANALYSIS OF SERIES AND PARALLEL MAGNETIC CIRCUITS.
MODULE 4: TRANSFORMERS (6 LECTURES)
MAGNETIC MATERIALS, BH CHARACTERISTICS,
IDEAL AND PRACTICAL TRANSFORMER, EMF EQUATION, EQUIVALENT CIRCUIT, LOSSES IN
TRANSFORMERS, REGULATION AND EFFICIENCY. AUTO-TRANSFORMER AND THREE-PHASE
TRANSFORMER CONNECTIONS.
MODULE 5: ELECTRICAL MACHINES (10
LECTURES)
CONSTRUCTION, WORKING, TORQUE-SPEED
CHARACTERISTIC AND SPEED CONTROL OF SEPARATELY EXCITED DC MOTOR. GENERATION OF
ROTATING MAGNETIC FIELDS, CONSTRUCTION AND WORKING OF A THREE-PHASE INDUCTION
MOTOR, SIGNIFICANCE OF TORQUE-SLIP CHARACTERISTIC. LOSS COMPONENTS AND
EFFICIENCY, STARTING AND SPEED CONTROL OF INDUCTION MOTOR. CONSTRUCTION AND WORKING OF SYNCHRONOUS GENERATORS.
MODULE 6: ELECTRICAL INSTALLATIONS (6 LECTURES)
COMPONENTS OF LT SWITCHGEAR: SWITCH FUSE UNIT (SFU), MCB, ELCB, MCCB, TYPES OF WIRES AND CABLES, EARTHING. TYPES OF BATTERIES, IMPORTANT
CHARACTERISTICS
FOR BATTERIES. ELEMENTARY CALCULATIONS FOR ENERGY CONSUMPTION, POWER FACTOR
IMPROVEMENT AND BATTERY BACKUP.
SUGGESTED TEXT / REFERENCE BOOKS
& D. P. KOTHARI AND I. J. NAGRATH, “BASIC
ELECTRICAL ENGINEERING”, TATA
MCGRAW HILL, 2010.
&
D. C. KULSHRESHTHA, “BASIC
ELECTRICAL ENGINEERING”, MCGRAW
HILL, 2009.
& L. S. BOBROW, “FUNDAMENTALS OF ELECTRICAL ENGINEERING”, OXFORD UNIVERSITY PRESS,
2011.
&
E. HUGHES, “ELECTRICAL AND ELECTRONICS TECHNOLOGY”, PEARSON, 2010.
& V. D. TORO, “ELECTRICAL ENGINEERING FUNDAMENTALS”, PRENTICE HALL INDIA, 1989.
& BASIC ELECTRICAL ENGINEERING BY FITZERALD, ET AL, TATA
MCGRAW HILL
&
FUNDAMENTALS OF
ELECTRICAL ENGG. BY R. PRASAD, PHI PUBLICATION
& BASIC ELECTRICAL ENGINEERING BY V.K. MEHTA AND ROHIT
MEHTA, S.CHAND PUBLICATION
COURSE OUTCOMES
v TO UNDERSTAND AND
ANALYZE BASIC ELECTRIC AND MAGNETIC CIRCUITS
v TO STUDY THE WORKING PRINCIPLES OF ELECTRICAL MACHINES AND POWER
CONVERTERS.
v TO INTRODUCE THE
COMPONENTS OF LOW VOLTAGE ELECTRICAL INSTALLATIONS
LABORATORY
LIST OF
EXPERIMENTS/DEMONSTRATIONS
v
BASIC SAFETY PRECAUTIONS. INTRODUCTION AND USE OF
MEASURING INSTRUMENTS
–
VOLTMETER, AMMETER, MULTI-METER, OSCILLOSCOPE. REAL-LIFE RESISTORS, CAPACITORS
AND INDUCTORS.
v MEASURING THE
STEADY-STATE AND TRANSIENT TIME-RESPONSE OF R-L, R-C, AND R-L-C CIRCUITS TO A
STEP CHANGE IN VOLTAGE (TRANSIENT MAY BE OBSERVED ON A STORAGE OSCILLOSCOPE).
SINUSOIDAL STEADY STATE RESPONSE OF R-L, AND R- C CIRCUITS – IMPEDANCE
CALCULATION AND VERIFICATION. OBSERVATION OF PHASE DIFFERENCES BETWEEN CURRENT AND
VOLTAGE. RESONANCE IN R-L-C CIRCUITS.
v TRANSFORMERS:
OBSERVATION OF THE NO-LOAD CURRENT WAVEFORM ON AN OSCILLOSCOPE (NON- SINUSOIDAL
WAVE-SHAPE DUE TO B-H CURVE NONLINEARITY SHOULD BE SHOWN ALONG WITH A
DISCUSSION ABOUT HARMONICS). LOADING OF A TRANSFORMER: MEASUREMENT OF PRIMARY
AND SECONDARY VOLTAGES AND CURRENTS,
AND POWER.
v THREE-PHASE TRANSFORMERS:
STAR AND DELTA
CONNECTIONS. VOLTAGE AND CURRENT RELATIONSHIPS (LINE-LINE
VOLTAGE, PHASE-TO-NEUTRAL VOLTAGE,
LINE AND PHASE CURRENTS). PHASE-SHIFTS BETWEEN THE PRIMARY AND SECONDARY SIDE. CUMULATIVE THREE-PHASE
POWER IN BALANCED THREE-PHASE CIRCUITS.
v DEMONSTRATION OF
CUT-OUT SECTIONS OF MACHINES: DC MACHINE (COMMUTATOR- BRUSH ARRANGEMENT),
INDUCTION MACHINE (SQUIRREL CAGE ROTOR), SYNCHRONOUS MACHINE (FIELD
WINGING - SLIP
RING ARRANGEMENT) AND SINGLE-PHASE INDUCTION MACHINE.
v
TORQUE SPEED CHARACTERISTIC OF SEPARATELY EXCITED DC MOTOR.
v SYNCHRONOUS SPEED OF TWO AND FOUR-POLE, THREE-PHASE INDUCTION MOTORS. DIRECTION REVERSAL BY CHANGE OF PHASE-SEQUENCE OF CONNECTIONS. TORQUE-
SLIP
CHARACTERISTIC OF AN INDUCTION MOTOR. GENERATOR OPERATION OF AN INDUCTION
MACHINE DRIVEN AT SUPER- SYNCHRONOUS SPEED.
v
SYNCHRONOUS MACHINE OPERATING AS A GENERATOR:
STAND-ALONE OPERATION WITH A LOAD.
CONTROL OF VOLTAGE THROUGH FIELD EXCITATION.
v DEMONSTRATION OF (A) DC-DC CONVERTERS (B) DC-AC CONVERTERS – PWM WAVEFORM
(C) THE USE OF
DC-AC CONVERTER FOR SPEED CONTROL OF AN INDUCTION MOTOR AND (D) COMPONENTS OF
LT SWITCHGEAR.
LABORATORY OUTCOMES
v GET AN EXPOSURE TO
COMMON ELECTRICAL COMPONENTS AND THEIR RATINGS.
v
MAKE ELECTRICAL CONNECTIONS BY WIRES OF APPROPRIATE RATINGS.
v
UNDERSTAND THE USAGE OF COMMON ELECTRICAL MEASURING INSTRUMENTS.
v UNDERSTAND THE BASIC CHARACTERISTICS OF TRANSFORMERS AND ELECTRICAL
MACHINES.
v GET AN EXPOSURE TO
THE WORKING OF POWER ELECTRONIC CONVERTERS
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