Facilities

Labs in the department
Sl No Name of Lab Lab in Charge Phone
1 Basic Electrical Engineering Lab A Suseela 9447307450
2 Analog Electronics Laboratory Dr. Leesha Paul 9495677407
3 Electrical Measurements And Instrumentation Lab Gireesh V Puthusserry 9349513339
4 Electrical Machines Lab I &II Dr. Priya G Das

9495827694

5 Digital Electronics Lab P  Krishna Prasad 9447442518
6 Power Electronics Lab Dr. Anitha P 9495071291
7 Advanced Electrical Engineering Lab Dr. Vasanti V 9447202266
8 Computer centre Dr. Sheela S 9497166490
9 M.Tech. Advanced Power Electronics Lab Dr. Sheela S 9497166490
List of experiments in Basic Electrical Engineering Lab
1 Study of PMMC/MI voltmeter/ammeter, dynamometer type wattmeter, clip on ammeter, analog/digital multimeters and static energy meters
2 Determination of V-I characteristics of a) wire wound rheostat and b) incandescent lamps in series & parallel
3 Measurement of linear resistance using voltmeter-ammeter method
4 Verification of Kirchoff’s laws in DC circuit
5 Verification of Superposition theorem in DC circuit
6 Verification of Thevenin’s theorem in DC circuit
7 Verification of Reciprocity theorem in DC circuit
8 Determination of impedance, admittance, power factor and real/reactive/apparent power drawn in RLC series/parallel circuits
9 Single phase power measurement using a) dynamometer type wattmeter b) 3 ammeters method and c) 3 voltmeters method in an RL load
10 3-phase power measurement using one wattmeter and two wattmeters
11 Power factor improvement in an RL circuit

List of experiments in Analog Electronics Lab
1 Study & Use of CRO: a) Measurement of current voltage, frequency and phase shift
2 Rectifiers and filters with and without shunt capacitors- Characteristics full wave rectifier- Ripple factor, Rectification efficiency, and % regulation
3 Second order LP and BP/notch filters using single OPAMP
4 RC coupled amplifier using BJT in CE configuration- Measurement of gain, input and output impedance and frequency response
5 FET amplifier- Measurement of voltage gain, current gain, input and output impedance
6 Characteristics of clipping and clamping circuits using diodes. Characteristics of voltage regulators- Design and testing of:zener regulator with emitter follower output
7 Characteristics of voltage regulators- Design and testing of:a) simple zener voltage regulator b) zener regulator with emitter follower output
8 OPAMP circuits - Design and set up of inverter, scale changer, adder, non-inverting amplifier, integrator , differentiator ,comparator
9 Phase shift and Wein’s Bridge oscillator with amplitude stabilization using OPAMPs.
10 Waveform generation - Square, triangular and sawtooth wave form generation using OPAMPs.
11 IC 555 Applications
12 PLL IC 565/566 Frequency multiplying, FSK demodulation
13 Introduction to circuit simulation-simulation of OPAMP and other analog IC circuits

List of Experiments in Electrical Measurements & Instrumentation Lab
MEASUREMENTS LAB
1
  1. a) Calibration of single phase energy meter by direct loading

b) Calibration of single phase static energy meter

2
  1. Calibration of single phase energy meter by phantom loading with and without phase shifting transformer
3
  1. Calibration of 3 phase energy meter a) phantom loading b) using phase shifting transformer
4 Measurement of self and mutual inductance a) air cored coil b) iron cored coil
5
  1. a) Determination of B- H curve

b) Determination of hysteresis loop using six point method .

6 Calibration of ammeter, voltmeter and wattmeter using vernier potentiometer
INSTRUMENTATION LAB
1
  1. Measurement of resistance using Wheastone’s Bridge and Kelvin Double bridge
2
  1. Extension of range of wattmeter using CT & PT
3
  1. Measurement of displacement using LVDT
4 Measurement of current/ voltage using Hall effect transducer
5
  1. Thermocouple based ON - OFF controller
6 Measurement of physical quantities - strain, torque and angle
7 Measurement of physical quantities - strain, torque and angle

List of Experiments in Electrical Machines Lab I
1

Obtain the open circuit characteristics of self excited DC shunt generator at rated speed
Objectives:
a) Predetermine the OCC at different speeds
b) Determine the critical field resistance
c) Obtain maximum voltage built up with given shunt field resistance
c) Obtain critical speed for a given shunt field resistance

2

Load test on DC shunt generator
Objectives:
a) Determine the external & internal characteristics
b) Deduce the armature reaction curve

3

Brake test on DC shunt / series motor
Objectives:
Plot the following characteristics
i) Efficiency Vs Output
ii) Line current Vs Output
iii) Speed Vs Output
iv) Speed Vs Torque

v) Line current Vs Torque
4

Perform Swinburne’s test on a DC shunt machine
Objectives:

Predetermine the armature current and percentage efficiency when the machine operates as a motor and as a generator for various load conditions and plot efficiency Vs output curves
5

Hopkinson’s test on a pair of DC machines
Objectives:

Determination of the efficiency of the given dc shunt machine working as a motor and generator under various load conditions
6

Retardation test on a DC machine
Objectives:
a) Separation of hysteresis, eddy current, friction & windage losses

b) Find the moment of inertia of the rotating system
7

No load test at different excitations on a DC shunt motor
Objectives:
a) Separation of hysteresis, eddy current, friction & windage losses

b) Plot the losses vs. speed curves
8

O.C. & S.C. tests on the single phase transformer
Objectives:
Predetermination of the following
a) Efficiency at different load conditions and different power factors
b) Regulation at different load conditions and different power factors
c) Equivalent circuit referred to HV and LV sides
d) UPF load at which efficiency is maximum
f) Power factors at which regulation is maximum and zero

g) Plot % regulation vs. p.f. curves
9

Load test on the single phase transformer
Objectives:
a) Determination of the efficiency at different load conditions and unity power factor
b) Determination of the regulation at different load conditions and unity power factor

c) Plot efficient vs. output & regulation Vs output curves
10

Separation of losses in a single phase transformer
Objectives:
Separate the hysteresis & eddy current losses at different voltages & different frequencies keeping V/f constant & plot losses vs. frequency curves. Hence

  1. (a)Separate the hysteresis & eddy current losses at normal voltage & different frequencies & plot losses vs. frequency curves
  2. (b)Separate the hysteresis & eddy current losses at normal frequency & different voltages &
plot losses vs. voltage curves
11

Sumpner’s test
Objective:
a) Predetermination of efficiency at different load conditions and power factors
b) Predetermination of regulation at different load conditions and power factors
c) Plot efficiency vs. output & regulation vs. power factor curves

d) Obtain the equivalent circuit referred to LV & HV sides
12

Scott connection of the single phase transformers
Objectives:
Determine the efficiency at different load conditions when
a) Main transformer alone loaded
b) Teaser transformer along loaded
c) both transformers loaded under balanced conditions
d) both transformers loaded under unbalanced conditions

Plot efficiency vs. output curves for each case

List of Experiments in Electrical Machines Lab II
1

No load & blocked rotor tests on 3 phase squirrel cage & slip ring induction motors
Objectives:

  1. (a) Determine the equivalent circuit parameters and hence predetermine the performance at full load from the equivalent circuit and
  • (b) Draw the circle diagram and hence predetermine the performance at full load from circle diagram.
(c) Plot the performance characteristics from circle diagram
2

Brake test on 3 phase squirrel cage & slip ring induction motors
Objectives:
1) Plot the following performance characteristics.
a) Electrical characteristics-Speed, line current, torque, power factor, efficiency & % slip Vs output power
b) Mechanical characteristics-Torque Vs speed/slip

2) Find the additional kVAR required to improve the power factor to 0.95 at various loads.
3

Performance of induction machine as a generator and motor
Objectives:
i) Operate the given 3 phase induction machine as a) induction motor and b) induction generator
ii) Conduct load test in both generating and motor modes
iii) Plot efficiency vs. output curves

iv) Plot output vs. slip and hence determine the hysteresis power
4

Slip test on 3-phase salient pole alternator
Objectives:
i) Determine the direct axis and quadrature axis synchronous reactances
ii) Predetermine the voltage regulation at different loads and power factors and plot
regulation vs. power factor

iii) Draw the power vs. torque angle characteristics for a specified induced emf
5

Voltage regulation of alternator
Objectives:
Predetermine the voltage regulation of the given 3 phase alternator by i) emf
method ii) mmf method and iii) Zero power factor (Potier) method.

6

Load test on pole changing induction motor
Objectives:

  1. (a) Study the different modes of operation of a 3 phase pole changing induction motor
  2. (b) Perform load test on pole changing induction motor and plot the various performance characteristics for low speed and high speed operation.
7

No load & blocked rotor tests on single phase induction motor
Objectives:

  1. (a) Conduct the no load and blocked rotor tests on single phase induction motor
  2. (b) Find the equivalent circuit parameters
(c) Predetermine its performance at rated speed
8

V curves on synchronous machine
Objectives:

  1. (a) Synchronize a 3 phase alternator to the supply mains using Dark/Bright lamp method
(b) Plot the V curves and inverted V curves when synchronous machine is acting as generator and motor at no load and constant power
9

Speed control of induction motor by variable frequency method
Objectives:

Control the speed of the 3 phase induction motor by changing the supply frequency on no load and at given load and plot the speed vs. frequency curve
List of Experiments in Digital Electronics Lab
1 Design of Half adder and half subtractor circuits with NAND gates using mode control
2 Design and realization of ripple counter using JK flip-flop
3 Design and realization of Johnson & Ring Counter using a) JK Flip Flop b) Shift Register
4 Synchronous UP/DOWN Counter design and realization
5 Implementation of multiplexer and demultiplexer using gates
6 Logic circuit implementation using multiplexer IC.
7 VHDL implementation of adder circuit and three bit counter.
8 VHDL simulation of adder circuit and counter.
9 8085 simple programming addition, data transfer, multiplication.
10 3-phase power measurement using one wattmeter and two 8085 interfacing –waveform generation-square wave generation, saw-tooth wave and triangular wave.

Lsit of Experiments in Power Electronics Lab
1 Determination of transfer function of DC motor a) armature control b) field control
2 Design and experimental determination of frequency response of lead/lag networks
3 Experiments using PLC
4 Relay characteristics
5 Study of 8086 microprocessor and implementation of simple programs
6 Study of 8051 microcontroller and implementation of simple programs
7 Interfacing an ADC with microcontroller to read an analogue signal
8 Generate a square wave, saw tooth wave and triangular wave using 8051 microcontroller
9 Generate a sine wave using 8051 microcontroller
10 Familiarization with MATLAB-simple programs
11 Simulation using MATLAB, SIMULINK, RL tool etc.
12 Familiarization of P, PI, PD & PID controllers
13
  1. Power flow analysis of the system with the given single line diagram using the given power flow analysis package.
14 Transient stability analysis of the system with the given single line diagram using the given package. The disturbance is 3-phase to ground solid SC fault at t=0. The fault is cleared at time t=5 cycles by permanently removing the fault line
15 Experiments by interfacing transducers like strain gauge, LVDT etc with 8085/8086

List of Experiments in Advanced Electrical Engineering Lab
1 Determination of transfer function of DC motor a) armature control b) field control
2 Design and experimental determination of frequency response of lead/lag networks
3 Experiments using PLC
4 Relay characteristics
5 Study of 8086 microprocessor and implementation of simple programs
6 Study of 8051 microcontroller and implementation of simple programs
7 Interfacing an ADC with microcontroller to read an analogue signal
8 Generate a square wave, saw tooth wave and triangular wave using 8051 microcontroller
9 Generate a sine wave using 8051 microcontroller
10 Familiarization with MATLAB-simple programs
11 Simulation using MATLAB, SIMULINK, RL tool etc.
12 Familiarization of P, PI, PD & PID controllers
13
  1. Power flow analysis of the system with the given single line diagram using the given power flow analysis package.
14 Transient stability analysis of the system with the given single line diagram using the given package. The disturbance is 3-phase to ground solid SC fault at t=0. The fault is cleared at time t=5 cycles by permanently removing the fault line
15 Experiments by interfacing transducers like strain gauge, LVDT etc with 8085/8086