A Project Based On

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A PROJECT BASED ON

ON-LOAD TAP CHANGING OF A TRANSFORMER USING

RELAY

Submitted in partial fulfillment of the requirement forDegree in Bachelor of Technology

(Electrical & Electronics Engineering)

Submitted by:

Supratik Datta

(072300128101005 )

Under the guidance of Mr. Pradyumna Roy

(Asst. Professor,

Department of Electrical & Electronics Engg.)

Camellia Institute of Technology

Digberia (Badu Road), Madhyamgram, Kolkata ² 700129

WEST BENGAL UNIVERSITY OF TECHNOLOGY

2010-2011



A PROJECT BASED ON


RELAY



Submitted by:

2.Sayanton Roy(072300128101025)

Under the guidance of

Mr. Pradyumna Roy(Asst. Professor,





2010-2011



A PROJECT BASED ON


RELAY



Submitted by:

4.Dipayan Dey(072300128101002)







2010-2011



A PROJECT BASED ON


RELAY



Submitted by:

5.Titas Kumar Nag(072300128101026)


Mr. Pradyumna Roy

(Asst. Professor,Department of Electrical & Electronics Engg.)




2010-2011



A PROJECT BASED ON


RELAY



Submitted by:

3.Dhrubajyoti Das(072300128101016)







2010-2011



A PROJECT BASED ON


RELAY



Submitted by:

NAME WBUT Registration No.

1.Supratik Datta (072300128101005)

2.Sayanton Roy (072300128101025)3.Dhrubajyoti Das (072300128101016)

4.Dipayan Dey (072300128101002)5.Titas Kumar Nag (072300128101026)

Under the guidance of Mr. Pradyumna Roy

(Asst. Professor,Department of Electrical & Electronics Engg.)




2010-2011



Index

TopicPage

No.

1. CERTIFICATE (GROUP) 1

2. CERTIFICATE

(INDIVIDUAL)2

3. ACKNOWLEDGEMENT 3

4. DECLARATION 4

5. ABSTRACT 5

6. On Load Tap Changer 6-24

7. Introduction7

ON LOADTAPCHANGING

8

ON LOAD TAPCHANGER 9

REACTER TRANSITION

TYPE OLTC

RESISTER TRANSITION

TYPE OLTC

SINGLE COMPARTMENT

TYPE OLTC10

DOUBLE

COMPARTMENT TYPE

OLTC



OLTC WITH CHANGE

OVER SELECTOR13

METHODS OF

POTENTIAL

CONNECTIONS

OLTC FOR DELTA

CONNECTION WINDING15

SINGLE COMPARTMENT

DESIGN

DOUBLE

COMPARTMENT DESIGN

16

AUTOMATIC CONTROL

OF TAPCHANGER18

TAP CHANGER

SELECTION

LATEST TRENDS IN TAP

CHANGER DESIGN19

Transition Without

Bridging Action

(Single Compartment Tap-

Changer)

20

Tap Transition

Including BridgingOperation (Double

Compartment Tap-

Changer

20

Resistance Type LTC 21



(Based on Arcing Tap

Switch)

Tap TransitionSequence based on

arcing switch-Flag

cycle (resistance type

LTC)

22

Reactance Type LTC23

Switching Principle24

8.Relays 27-35

General purpose

electromechanical

relays28

The Relay used in our

Project 30

Characteristic chart31

Ratings32

Characteristics 33

Precautions 35



9.Main Overview of the

project done36-37

Apparatus used 36

Connection 36

Circuit Diagram 37

10. Final Model 38

11. Advantages &

Disadvantages Of our

Model

39

12. Result and Discussion 40

13. Conclusion and Future

Scope41

14. Bibliography 43



CERTIFICATE

(INDIVIDUAL)

This is to certify that the project entitled ´ON-LOAD TAPCHANGING OF A TRANSFORMER USING RELAYµ , submitted by Supratik Datta (072300128101005) ,final year student of Bachelor of Technology (Electrical & Electronics Engineering) [2007-2011], of Camellia Institute of Technology affiliated to WEST BENGALUNIVERSITY OF TECHNOLOGY, is hereby accepted and approved as acredible work. It is further certified that this work has not been submitted

for similar purpose anywhere else. His work has been found satisfactory forthe partial fulfillment of the requirement for the award of the degree of Bachelor of Technology in Electrical & Electronics Engineering.

___________________________ Date:

Mr. Pradyumna RoyAsst. Professor & Project Guide Place:Department of Electrical & Electronics EngineeringCamellia Institute of Technology

___________________________ Date

Prof. Ajoy Kr DuttaHEAD Place:Department of Electrical & Electronics EngineeringCamellia Institute of Technology



CERTIFICATE

(INDIVIDUAL)

This is to certify that the project entitled ´ON-LOAD TAPCHANGING OF A TRANSFORMER USING RELAYµ , submitted by Sayanton Roy (072300128101025) , final year student of Bachelor of Technology (Electrical & Electronics Engineering) [2007-2011], of Camellia Institute of Technology affiliated to WEST BENGALUNIVERSITY OF TECHNOLOGY, is hereby accepted and approved as acredible work. It is further certified that this work has not been submitted for

similar purpose anywhere else. His work has been found satisfactory for thepartial fulfillment of the requirement for the award of the degree of Bachelor of Technology in Electrical & Electronics Engineering.

___________________________ Date:


___________________________ Date




CERTIFICATE

(INDIVIDUAL)

This is to certify that the project entitled ´ON-LOAD TAPCHANGING OF A TRANSFORMER USING RELAYµ , submitted by Dhrubajyoti Das (072300128101016),final year student of Bachelor of Technology (Electrical & Electronics Engineering) [2007-2011], of Camellia Institute of Technology affiliated to WEST BENGALUNIVERSITY OF TECHNOLOGY, is hereby accepted and approved as acredible work. It is further certified that this work has not been submitted


___________________________ Date:


___________________________ Date




CERTIFICATE

(INDIVIDUAL)

This is to certify that the project entitled ´ON-LOAD TAPCHANGING OF A TRANSFORMER USING RELAYµ , submitted by Titas Kumar Nag (072300128101026),final year student of Bachelor of Technology (Electrical & Electronics Engineering) [2007-2011], of Camellia Institute of Technology affiliated to WEST BENGALUNIVERSITY OF TECHNOLOGY, is hereby accepted and approved as acredible work. It is further certified that this work has not been submitted


___________________________ Date:


___________________________ Date




CERTIFICATE

(INDIVIDUAL)

This is to certify that the project entitled ´ON-LOAD TAPCHANGING OF A TRANSFORMER USING RELAYµ , submitted byDipayan Dey (072300128101002),final year student of Bachelor of Technology (Electrical & Electronics Engineering) [2007-2011], of Camellia Institute of Technology affiliated to WEST BENGALUNIVERSITY OF TECHNOLOGY, is hereby accepted and approved as acredible work. It is further certified that this work has not been submitted for

similar purpose anywhere else. His work has been found satisfactory for thepartial fulfillment of the requirement for the award of the degree of Bachelor of Technology in Electrical & Electronics Engineering.

___________________________ Date:


___________________________ Date


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