A PROJECT REPORT ON CONSTRUCTION OF AUTOMATIC PHASE CHANGER PRESENT ED

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A PROJECT REPORT ON CONSTRUCTION OF AUTOMATIC PHASE CHANGER PRESENT ED

TABLE OF CONTENT

Cover page

Dedication

Certification

Acknowledgement

Table of content

CHAPTER ONE

1.1 Introduction

1.2 Block diagram of an automatic phase changer

1.3 Component list

CHAPTER TWO- COMPONENT DESCRIPTION

2.1.1Comparator

2.1.2Zener diode p.n junction, electron, avalanche diode, avalanche breakdown}

2.1.3Rectifier

2.1.4Relay

2.2 Transformer

2.3 Capacitor

2.4 Fuse

CHAPTER THREE

3.1 Comparator/voltage sensor stag.

3.2 Design calculator

3.3 Oscillator circuit

3.4 Flip flop/switching Transistor stage

3.5 Logic circuit

3.6 Transistor switching circuit

3.7 Relay switching circuit

3.8 Output load terminal

3.9 Methodology

CHAPTER FOUR

4.1 Working

4.2 Performance evaluation

4.3 Circuit diagram

4.4 Planning of work

4.5 Application

CHAPTER FIVE

5.1CONCLUSION

5.2Recommendation

5.3Reference

CHAPTER ONE

1.0 INTRODUCTION

Raw power instability in developing countries creates a need for automation of electrical power generation or alternative sources of power to back up the utility supply. This automation is required as the rate of power outage becomes predominantly high. Most industrial and commercial processes are dependent on power supply and if it processes of change-over are manual, serious time is not only wasted but also creates devices or machine damages from human error during the change-over connections, which could bring massive losses. The starting of the generator is done by a relay which switches the battery voltage to ignition coil of the generator while the main power relay switches the load to either public supply or generator. Fig 1 shows the generalized block diagram of the system. The approach used in this work is the moduler approach where the overall design was first broken into functional block diagrams, where each block in the diagram represents a section of the circuit that carries out a specific function.

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