AUTOMATIC PHASE SELECTOR FOR 3-PHASE POWER SUPPLY
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TITLE PAGE
DESIGN AND CONSTRUCTION OF AN AUTOMATIC PHASE SELECTOR FOR 3-PHASE POWER SUPPLY
BY
---
EE/H2013/01430
DEPARTMENT OF ---
INSTITUTE OF ---
DECEMBER,2018
APPROVAL PAGE
This is to certify that the research work, "automatic phase selector for 3-phase power supply" by ---, Reg. No. EE/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on Electrical and Electronics Engineering has been approved.
By
Dr. --- Dr. ---
Supervisor Head of Department.
Signature………………. Signature……………….
……………………………….
Dr. ---
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.
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This project work is on the design and construction of automatic phase selector for 3-phase power supply. It provides a means of switching from one phase of AC mains to another in the case of failure in the existing phase; This project has been improved on the existing types of electromechanical device that has being in use over the years. Hence this has been achieved by the use of operational amplifier, timing circuit and high current relay switches and it is powered by 12V dc power supply. The aim of this work is to design and construct an Auto Phase Selector introduces an automatic solution to overcome power fluctuation/phase interruption by selecting next most healthy available phase from three phase supply to feed the equipment without any notice of power outage.
TABLE OF CONTENTS
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWELDGEMENT
ABSTRACT
CHAPTER ONE
INTRODUCTION
1.1 BACKGROUND OF THE PROJECT
- PROBLEM STATEMENT
- AIM OF THE PROJECT
- PURPOSE OF THE PROJECT
- SIGNIFICANCE OF THE PROJECT
- BENEFIT OF THE PROJECT
- APPLICATION OF THE PROJECT
- METHODOLOGY
- DEFINITION OF TERMS
- PROJECT ORGANISATION
CHAPTER TWO – LITERATURE REVIEW
2.1 OVERVIEW OF RELEVANT TECHNOLOGY
2.2 REVIEW OF RELATED WORKS EXISTING SYSTEM
2.3 SUMMARY OF REVIEWED WORKS
CHAPTER THREE – RESEARCH METHODOLOGY
3.1 INTRODUCTION
3.2 ANALYSIS OF THE EXISTING SYSTEM
3.3 SYSTEM FLOW CHAT
3.4 OVERVIEW OF PROPOSED SYSTEM DESIGN
3.5 INPUT DESIGN
3.6 PROCESS DESIGN
3.7 OUTPUT DESIGN
3.8 SUMMARY OF SYSTEM ANALYSIS AND DESIGN
CHAPTER FOUR - SYSTEM IMPLEMENTATION AND EVALUATION
4.1 INTRODUCTION
4.2 SYSTEM HARDWARE REQUIREMENT
4.3 DATA SOURCE
4.4 IMPLEMENTATION PROCEDURE
4.5 SAMPLE IMPLEMENTATION SNAPSHOT
4.6 SAMPLE IMPLEMENTATION OUTPUT
4.7 EVALUATION RESULT
4.8 DISCUSSION OF THE RESULT
CHAPTER FIVE
5.1 SUMMARY OF RESULT
5.2 CONCLUSION
5.3 RECOMMENDATIONS
5.4 SUGGESTION FOR FUTURE RESEARCH
5.5 REFERENCES
APPENDIX A: USER’S GUIDE
APPENDIX B: COST ANALYSIS
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE STUDY
In Nigeria today the problems of power outage across phases is so rampant thus leading to some sensitive equipment and appliances being redundant, this could sometimes be the cause of one phase going out with respect to the other according to [William D, 2009] . It may surprise one to note that in an attempt to solve this problems, so many unskilled electricity consumers has in recent past resorted to some crude means of swapping between phases to obtain power. So many souls have been lost in this act. This is an undesirable condition to consumers and the need now arises to design a device that can automatically select among the phases and make power supply available at the consumers terminal [William D, 2009]. However, this can only be possible if one have a three phase met or and there is supply from any of the service line or the entire line, this project known as a three phase automatic phase selector has been constructed with a view of solving the problems stated above. The design and construction was based on the principle of Electro magneto-Dynamism and alignment as demonstrated in the contactor arrangement [Theo. Audel and Co, 1998]. Among other components are the timers miniature-circuit breakers the contactors and indicator bulbs, the ease with which the device is operated is well elaborated to ensure simplicity effort were made to present a stop by step operation of the project. As much as there is no project without limitation and applications, we have as well dedicated a section of this paper to look into it [William D, 2009].
In order to ease the effort of technicians in restoring the devices should there be any malfunction associated.
Faults and how they are cleared is presented, however, there are no user serviceable parts in the device therefore all maintenance should be referred to a qualified electrical personnel [Cotton H, 2011].
1.2 PROBLEM STATEMENT
Power failure / under and over voltage in a country, state or city is highly detrimental to development in public and private industries. The insecurity associated with these problems 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 digital automatic power changeover. It has the capacity to automatically switch power from national grid to generator and vice versa, once there is power failure in any of the two power supplies and at the same time has the capacity of shutting down a generator set once the mains grid is been restored according to Theo. Audel and Co, 1998.
1.3 OBJECTIVE OF THE PROJECT
The objective of this work is to design a device that will overcome power fluctuation phase interruption by selecting next most healthy available phase to feed the equipment.
1.4 SIGNIFICANCE OF THE PROJECT
Industries require three phases power to run their machinery. Some of them require continuous \ uninterrupted power to maintain their data. Auto phase selector unit for equipment whose supply is single phase. The single phase supply is selected automatically from three phases supply.
Auto Phase Selector introduces an automatic solution to overcome power fluctuation \ phase interruption by selecting next most healthy available phase to feed the equipment [ Fowler, Nick 2011].
1.5 LIMITATION OF THE PROJECT
In every home, office or industries, automatic phase selector plays a vital role, that is, It provides a means of switching from one phase of AC mains to another in the case of failure in the existing phase; 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 the three phases short-circuiting, until a multiplexing circuit was gotten.
- Difficult in wiring because of the strong wiring the project required [ Fowler, Nick 2011].
1.6 SCOPE OF THE PROJECT
This work covers only a three phase automatic phase selector 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 the existing phase.
1.7 APPLICATION OF THE PROJECT
This device is used in the following places [Theo. Audel and Co, 1998]
- home,
- office,
- worship places
- workshops or industries
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 device is carried out
- Finally, the whole device was cased and final test was carried out.
1.8 DEFINITION OF TERMS
POWER OUTAGE / POWER FAILURE: A power outage is the loss of the electrical power network supply to an end user.
AUTOMATIC CHANGEOVER is device that automatically transfers power from generator supply to PHCN supply when available and stops the generator without without human intervention
1.8 PROJECT ORGANISATION
The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.
CHAPTER TWO: The complete chapter two of “automatic phase selector for 3-phase power supply” is available. Order full work to download. Chapter two of “automatic phase selector for 3-phase power supply” consists of the literature review. In this chapter all the related work on “automatic phase selector for 3-phase power supply” was reviewed.
CHAPTER THREE: The complete chapter three of “automatic phase selector for 3-phase power supply” is available. Order full work to download. Chapter three of “automatic phase selector for 3-phase power supply” 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 “automatic phase selector for 3-phase power supply” is available. Order full work to download. Chapter four of “automatic phase selector for 3-phase power supply” consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of “automatic phase selector for 3-phase power supply” is available. Order full work to download. Chapter five of “automatic phase selector for 3-phase power supply” consist of conclusion, recommendation and references.
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