Departments ELECTRICAL ELECTRONICS CONSTRUCTION OF 100A SINGLE PHASE AUTOMATIC CHANGE OVER SWITCH

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CONSTRUCTION OF 100A SINGLE PHASE AUTOMATIC CHANGE OVER SWITCH
CONSTRUCTION OF 100A SINGLE PHASE AUTOMATIC CHANGE OVER SWITCH

TABLE OF CONTENT

Title page

Dedication ii

Certification iii

Acknowledgment iv

Table of content v

Abstract vii

CHAPTER ONE

INTRODUCTION 1

1.1 Effect of Power Failure 3

1.2 Manual Change Over switch 3

1.3 Automatic ChangeOver Switch 4

1.4 Aims of the Project 5

1.5 Objectives of the Project 5

1.6 Significance of the project 5

1.7 Important of changeover switch 5

CHAPTER TWO

Literature review 6

CHAPTER THREE

OPERATION OF THE CHANGEOVER SWITCH

3.1 Operating Mechanism 11

3.2 Mode of Operation 11

3.3 Method of Operation 14

3.3.1Input Terminal 15

3.3.2Output Load terminal 15

3.4 Design and Analysis of Changeover Switch 15

CHAPTER FOUR

MAINTENANCE, TESTING OF EQUIPMENT, BILL OF ENGINEERING AND PERFORMANCE EVALUATION

4.1 Maintenance and Repair 17

4.1.2Repair 17

4.2 Testing of Equipment 18

4.2.1Engineering testing 18

4.3 Financial Estimation of the Project 19

4.4 Performance Evaluation and Discussion 20

CHAPTER FIVE

CONCLUSION and RECOMMENDATION

5.1 Conclusion 21

5.2 Recommendation 22

REFERENCES

ABSTRACT

Most industrial and commercial processes are dependent on electrical power. In the event of power interruptions, the changeover from electrical power supply which are usually performed manually, often result in waste of time. Moreover, machine damage sometimes occurs because of human errors. These can cause significant financial losses. This project present the design and construction of an automatic change over switch that switches electrical power supply from the public supply PHCN to a generator or other source of electrical supply in the event of a power outage or insufficient voltage. The system uses an electronic control circuit involving integrated circuit, transistor and electromechanical device.


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