CHANGEOVER SWITCH USING CONTACTOR INCORPORATING SURGE PROTECTION
USER'S INSTRUCTIONS: The project work you are about to view is on "changeover switch using contactor incorporating surge protection". Please, sit back and study the below research material carefully. This project topic "changeover switch using contactor incorporating surge protection" have complete 5(five) Chapters. The complete Project Material/writeup include: Abstract + Introduction + etc + Literature Review + methodology + etc + Conclusion + Recommendation + References/Bibliography.Our aim of providing this "changeover switch using contactor incorporating surge protection" project research material is to reduce the stress of moving from one school library to another all in the name of searching for "changeover switch using contactor incorporating surge protection" research materials. We are not encouraging any form of plagiarism. This service is legal because, all institutions permit their students to read previous projects, books, articles or papers while developing their own works.
TITLE PAGE
CHANGEOVER SWITCH USING CONTACTOR INCORPORATING SURGE PROTECTION
BY
---
EE/H2013/01430
DEPARTMENT OF ----
SCHOOL OF ---
INSTITUTE OF ---
DECEMBER,2018
APPROVAL PAGE
This is to certify that the research work, "changeover switch using contactor incorporating surge protection" by ---, Reg. No. EE/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on --- has been approved.
By
--- . ---
Supervisor Head of Department.
Signature………………. Signature……………….
……………………………….
---
External Invigilator
DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.
ACKNOWLEDGEMENT
The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.
PROJECT DESCRIPTION: This work "changeover switch using contactor incorporating surge protection" research material is a complete and well researched project material strictly for academic purposes, which has been approved by different Lecturers from different higher institutions. We made Preliminary pages, Abstract and Chapter one of "changeover switch using contactor incorporating surge protection" visible for everyone, then the complete material on "changeover switch using contactor incorporating surge protection" is to be ordered for. Happy viewing!!!
The Changeover Switch is a device used to switch off a power supply and subsequently switch on another power supply. An Automatic Changeover Switch switches from generator to mains automatically when there is mains supply and vice-versa. The power surge incorporated in this work protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold.
The main aim of any electric power supply in the world is to provide uninterrupted power supply at all times to all its consumers and also to protect appliances from power surge.
TABLE OF CONTENTS
TITLE PAGEAPPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRCT
TABLE OF CONTENT
CHAPTER ONE
- INTRODUCTION
- BACKGROUND OF THE PROJECT
- PROBLEM STATEMENT
- AIM/OBJECTIVE OF THE PROJECT
- SIGNIFICANCE OF THE PROJECT
- PURPOSE OF THE PROJECT
- STATEMENT OF PPROBLEM
- LIMITATION OF THE PROJECT
- APPLICATION OF THE PROJECT
- DEFINITION OF TERMS
- PROJECT ORGANISATION
CHAPTER TWO
LITERATURE REVIEW
2.0 LITERATURE REVIEW
2.1 REVIEW OF ELECTRICAL PHASES
2.2 REVIEW OF THREE-PHASE ELECTRIC POWER
2.3 REVIEW OF CAUSES OF POWER FAILURES
2.4 POWER SUPPLY RELIABILITY
2.5 OVERVIEW OF CONTACTOR
CHAPTER THREE
3.0 CONSTRUCTION METHODOLOGY3.1 BLOCK DIAGRAM OF THE SYSTEM
3.2 CIRCUIT DIAGRAM
3.3 CIRCUIT DESCRIPTION
3.4 SYSTEM OPERATION
3.5 COMPONENTS LIST
3.6 DESCRIPTION OF MAJOR COMPONENTS USED
CHAPTER FOUR
4.0 RESULT ANALYSIS
4.1 CONSTRUCTION PROCEDURE AND TESTING
4.2 ASSEMBLING OF SECTIONS
4.3 CONSRUCTION OF THE CASING
4.4 ECONOMIC OF THE PROJECT
4.5 PROJECT VIABILITY
4.6 PROJECT RELIABILITY
4.7 PROJECT MAINTAINABILITY
4.8 PROJECT EVALUATION
4.9 TESTING, TROUBLESHOOTING AND REMEDY
CHAPTER FIVE
- CONCLUSIONS
- RECOMMENDATION
5.3 REFERENCES
CHAPTER ONE
- INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
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.
In his book, Tony Rudkin also said that the depredation caused by such reduce efficiency of the organization and leads to a great deal of frustration.
Sequel to the rate at which more sophisticated electrical/electronics gadgets are being procured and installed in our homes, hospitals and business premises, there is a justifiable need for a faster and more reliable change over system in an event of power outage.
The Changeover system switches off a power supply and subsequently switch on another power supply. Basically it is aimed at switching on a more convenient power supply to the load.
Since it switches on power to the load, precautions has to be taken while choosing the type of Change Over Switch, while selecting the appropriate size, the control of arcing has to be put into consideration.
A good switch should be the one whose contact is made in such a way as to limit the arc formation by having no contact-bounce and by having contacts made of good conductive, corrosion resistance and wear resistance materials.
A good change over switch must have adequate insulation and must be so constructed and located as not to constitute a potential hazard.
A good change over switch should also have tight contact points so as to limit or eliminate the possibility of partial contact at the contact point. The partial contact leads to over heating of the components and may lead to fire outbreak in the entire room.
1.2 PROBLEM STATEMENT
Power failure or outage in a country, state or city is highly detrimental to development in public and private industries. The insecurity associated with constant or frequent power failure or outage brings about limitation to power consistent investments, thus hampering the development of industries and multinational ventures. Processes like carrying out surgical operations in hospitals, laboratories which require constant power supply for research, money transactions between banks and more require constant use of uninterrupted power. In other to solve this problem, an automatic changeover switch was invented. This research covers the design and construction of a single phase automatic power changeover. It has the capacity to automatically switch power from national grid to generator and vice versa, and also has the capacity of protecting electrical appliances connected to it from power surge.
- AIMS AND OBJECTIVES
The main aim of any electric power supply in the world is to provide uninterrupted power supply at all times to all its consumers, a device which switches on the head from power Holding Company (PHCN) to a generator when power fails and from generator to PHCN when power comes back, using contactor as the switching device and to protect loads from damages due to peak AC voltage or surge using surge protector switch.
1.4 SIGNIFICANCE OF THE PROJECT
The automatic change over switch, the switch aimed at achieving the following automatic actions;
- To change power over to generator
- To change back to PHC
- To change the generator.
The automatic change over unit can be operated in single or three phase system. The automatic change over switch has the following advantages;
It minimizes damages to lives/equipment since it has its own monitoring system and its switching requires no human contact with the switch, thus eliminating human error.
It reduces its change over timing to the minimum due to its fast response to power outage.
It maintains high quality of service through its fast and prompt response.
Moreover, the size and captivity of the unit will depend upon the load for which it will be used. The unit is also portable, easy, convenient and safe to install.
1.5 LIMITATION OF THE PROJECT
In every home, office or industries, automatic power changeover plays a vital role, that is, It provides a means of switching from utility AC mains to generator in the case of power failure; This project has been improved on the existing types of electromechanical device that has being in use over the years.
In the course of designing this project, different kinds of problem was notice such as:
- Difficulty in troubleshooting with circuit without the circuit diagram
- Difficulty in connecting the output without short-circuiting, until a multiplexing circuit was gotten.
- Difficult in wiring because of the strong wiring the project required.
1.6 SCOPE OF THE PROJECT
This work covers only a one phase automatic changeover which can only be used for providing a means of switching from one phase of AC mains to another in the case of failure in public utility. The power surge incorporated in this work protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or shorting to ground any unwanted voltages above a safe threshold.
1.7 APPLICATIONS OF THE PROJECT
- This circuit can be used as a home lighting system with few modifications.
- It can be used to drive other DC loads like a DC motor of any electronic appliance or other toy applications.
1.8 METHODOLOGY
To achieve the aim and objectives of this work, the following are the steps involved:
- Study of the previous work on the project so as to improve it efficiency.
- Draw a block diagram.
- Test for continuity of components and devices,
- Design and calculation for the device was carried out.
- Studying of various component used in circuit.
- Construction of the circuit was carried out.
- Finally, the whole device was cased and final test was carried out.
1.9 DEFINITION OF TERMS
CHANGEOVER: Generally, a changeover switch is a system which could be operated manually or automatically , that changes one source of power supply to another source in case of power failure from either of the two sources.
RELAY: relay is one of the major components used in this work which is an electrical device, typically incorporating an electromagnet, which is activated by a current or signal in one circuit to open or close another circuit.
POWER FLUCTUATIONS: is a periodic dip or spikes in the electrical current of any given circuit.
POWER FAILURE: is a short- or long-term loss of the electric power to an area.
1.10 PROJECT WORK ORGANISATION
The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:
Chapter one of this works is on the introduction to changeover switch. In this chapter, the background, significance, objective limitation and problem of changeover switch were discussed.
Chapter two is on literature review of changeover switch. In this chapter, all the literature pertaining to this work was reviewed.
Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.
Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.
Chapter five is on conclusion, recommendation and references.
CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "changeover switch using contactor incorporating surge protection" is also available. Order full work to download. Chapter two of "changeover switch using contactor incorporating surge protection" consists of the literature review. In this chapter all the related work on "changeover switch using contactor incorporating surge protection" was reviewed.
CHAPTER THREE: The complete chapter three of "changeover switch using contactor incorporating surge protection" is available. Order full work to download. Chapter three of "changeover switch using contactor incorporating surge protection" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.
CHAPTER FOUR: The complete chapter four of "changeover switch using contactor incorporating surge protection" is available. Order full work to download. Chapter four of "changeover switch using contactor incorporating surge protection" consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of design and construction of a "changeover switch using contactor incorporating surge protection" is available. Order full work to download. Chapter five of "changeover switch using contactor incorporating surge protection" consist of conclusion, recommendation and references.
To "DOWNLOAD" the complete material on this particular topic above click "HERE"
Do you want our Bank Accounts? please click HERE
To view other related topics click HERE
To "SUMMIT" new topic(s), develop a new topic OR you did not see your topic on our site but want to confirm the availiability of your topic click HERE
Do you want us to research your new topic? if yes, click "HERE"
Do you have any question concerning our post/services? click HERE for answers to your questions
For more information contact us through any of the following means:
Mobile No 
:+2348146561114 or +2347015391124 [Mr. Innocent]
Email address 
:engr4project@gmail.com
Watsapp No 
:+2348146561114
COUNTRIES THAT FOUND OUR SERVICES USEFUL
Australia, Botswana, Canada, Europe, Ghana, Ireland, India, Kenya, Liberia, Malaysia, Namibia, New Zealand, Nigeria, Pakistan, Philippines, Singapore, Sierra Leone, South Africa, Uganda, United States, United Kindom, Zambia, Zimbabwe, etc
Support: +234 8146561114 or +2347015391124
Watsapp No :+2348146561114
Email Address :engr4project@gmail.com
FOLLOW / VISIT US VIA:
