Lab Manual for UEL-3rd

7/29/2019 Lab Manual for UEL-3rd

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LABORATORY MANUAL

COURSE CODE: ELE-303

COURSE TITLE: UNIFIED ELECTRICAL LAB-III


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TABLE OF CONTENTS

S. No. Title of the Experiment Page No.

1 1) To study the performance of transmission line.

2) To compute its ABCD parameters.

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2 To find the earth resistance using three spikes. 5

3 1) To perform load test on a single phase induction motor.

2) To plot torque speed characteristics.

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4 1) To reverse the direction of three phase induction motor using star deltastarter.

2) To start the three phase induction motor using it.

3) To study star delta starters physically.

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5 To perform no load and short circuit test on three phase alternator and draw open

circuit and short circuit characteristics.

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6 To study speed control of induction motor using Silicon Controlled Rectifier. 16

7 1) To draw V-I characteristics of an Unijunction Transistor.

2) To use Unijunction transistor as oscillator.

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8 To plot waveforms for output voltage and current for single phase full-wave controlled

bridge rectifier for different angles.

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9 Familiarization with the microprocessor kits. 28

10 Simple programs for sorting a list of numbers in ascending and descending order. 31


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EXPERIMENT 1

Experiment: To study the performance of a transmission line. Also compute its ABCD parameters.

Equipment Required:

Learning Objectives:

Outline of the Procedure:


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Learning outcomes: to be written by the students in 50-70 words.


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EXPERIMENT 2

Experiment: To find the earth resistance using three spikes

Equipment Required: Jumper wire, earth tester or ohmmeter, three earth electrodes

Connecting leads, tools(hammer, screw driver, plier)

Learning Objectives: After performing this experiment, one can measure the earth resistance using

three terminal tests

Outline of the Procedure: Bury the auxiliary electrodes away from the earthling electrode under

test make the connections of the earth tester with the three electrodes as shown Rotate the

handle at constant speed (160 RPM) and take the reading change the position of auxiliary

electrodes twice and take the readings of earth tester and record the observation table.

Required Results:

Generally earth resistance with permissible values is: Large

power stations: 0.5 ohmMajor power stations: 1.0 ohm

Small substation: 2.0 ohm In all

other cases:8.0 ohm

Observation:



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EXPERIMENT 3

Experiment:

Equipment Required:




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Required Results:


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Draw the graphs between followings:

Cautions:



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EXPERIMENT 4

Experiment:

Equipment Required:

LearningObjectives:


1) Make the connections to the motor through TPIC switch and star delta starter.


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2) Start the motor by bringing the lever of the starter to start (star) position and then

with the jerk to the run(delta) position

3) Observe the direction of rotation of motor

4) Stop the motor by pushing the stop button at the starter and switch off the TPIC

switch

5) To reverse the direction of rotation of the motor, interchange the leads of the

motor at any two terminals of the TPIC switch

6) Switch off the TPIC switch and start the motor again, observe the direction of

rotation of rotation of the motor

7) Switch off the motor and the supply

Cautions:



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EXPERIMENT 5

Experiment:

Equipment Required:


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EXPERIMENT 6

Experiment: Speed control of induction motor using SCR



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EXPERIMENT 7

Experiment: A) Todraw V-I characteristics of an UJT

B) To use UJT as oscillator

Equipment Required:




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EXPERIMENT 8

Experiment: To plot waveforms for output voltage and current for three single phases

Fully controlled bridge rectifier for different angles

Equipment Required:

Experimental trainer kit, CRO, connecting leads etc.



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EXPERIMENT 9

Experiment: Familiarization with the microprocessor kits


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EXPERIMENT 10

Experiment: Simple program for sorting a list of numbers in ascending and descending order.



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Lab Manual for UEL-3rd

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