CONSTRUCTION OF AN AUTOMATIC CHANGE OVER SWITCH (3.7KVA) – Complete Project Material

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CONSTRUCTION OF AN AUTOMATIC CHANGE OVER SWITCH (3.7KVA)

By

NNAMANI IFEANYI B. EE/H2003/014

Presented To

Department of Electrical/Electronic Engineering

ABSTRACT

Due to inconsistent supply of power, there is a growing need for an alternative source of power supply. This has lead to heavy capital investment in a bid to suppress power failure and ensure regular power supply for the industry, hospitals, schools and homes. The problem of power failure can be checkmated with the use of stand-by generating set.

An Engineering Author, “Tony Rudkin”  said in his book titled “Upgraded Signal Source with Improved Performance and Reliability” that the cost and depredation associated with breakdown vary from one application to the other, and in some cases, the user has little choice but to ensure that a stand-by unit is available to take over on event of failure of primary system.

If some of these big firm do not make provisions for stand-by power source, frustration could set in which may lead to the closure of business and thus throwing workers into unemployment. Also in the case of hospital, undergoing a surgical operation and power supply suddenly go off, the patient might loose his or her life due to the power outage.

Furthermore, if the president of the country is making nationwide broadcast and all of a sudden power went off in the transmitting station, it would be viewed as an attempt to sabotage the government ruling and some people must pay for it.

TABLE OF CONTENT

Title page

Certification /approval page

Dedication

Acknowledgement

Table of content

CHAPTER ONE

1.0 Introduction

1.1 Background

1.2 Aims and Objectives

1.3 Scope or Limitation

CHAPTER TWO

2.0 Literature Review

2.1 System Operation of Automatic Change over Switch

2.2 The Stand by Power Unit

2.3 Requirement for a Generator to be use on an Automatic Change over Switch

2.4 Fundamental Relay Operation

2.5 Definition of Operation and Feature

2.6 Time Delay Relay

2.7 Types of Construction for Timing Unit

2.8 Contactor Theory and Configuration

2.9 Contactor Mode of Operation

CHAPTER THREE

3.0 Construction

3.1 Circuit Diagram

3.2 Component and Key Symbols

3.3 Sequence of Operation

3.4 Testing and Result

3.5 The Packaging

CHAPTER FOUR

OBSERVATION SUMMARY AND CONCLUSION

4.1 OBSERVATION

4.2 SUMMARY

4.2  SUGGESTIONS

4.3 CONCLUSION

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