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--/H2013/01430
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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.

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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.
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PROJECT DESCRIPTION: This work"construction of automatic phase changer"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"design and installation of 5000 watt solar power system"is to be ordered for. Happy viewing!!!

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CHAPTER ONE
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.The functional block diagram fig 1 also shows the interconnection between these blocks.Each section of the block is analyzed below.A manual change-over switch consists of  a manual change over switch box,switch gear box and cut out fuse or the connected fuse as describe by the by rocks and Mazur{1993}.This change-over switch box separate the sources between the generator and public supply when there is power supply outage from public supply,someone has t go and change the line to generator.Thus when power supply is restored,someone has to put off the generator and then change the source line from generator to public supply.    
         In view of the above manual change-over switch system that involves man power in starting the generator and switching over from public supply to generator and vice-versa when the supply is restored.
          The important attached to cases of operation in hospitals and airport in order to save life from generator as fast as possible makes it important for the design construction of automatic change-over switch which would solve the problem of manpower and the danger likely to been countered changeover.
            The electronic control monitors the incoming public supply voltage and detects when the voltage drops below a level that electrical or electronics gadgets can function depending on the utility.
Fig 1 Block diagram of an automatic change over switch
 

 

COMPONENT LIST
Component name                                    Quality            
Step down transformer                                    3
(Files 22ov - 12v 300mA)
Fuse (F1 - F3 = 5A)                                          3
IC (IC1 – Ic3 =741)                                           3
Transistor (T1, T2, T3 = BC 557)                      3
Relay (RL1 – RL3 = 12v LC/o Relay)                 3
Zener diode CZD1 = ZD3 = 5, 1v                      3
Variable resistance (VR4 – VR3 = 10K)             3
Resistance (R1, R2, R4, R5, R7,R8 = 3,3k               9
R3, R6, R9 = 10K)
Diode                                                               9
Capacitor (C1 – C4 = 1000uf 25V                     7
C5 – C7 = 470uf 35V)
Wires       ACC, TO
Requirement

CHAPTER FIVE
The various test carried out and the results obtained demonstrate that the automatic phase change. Change –over switch achieved it’s design and construction aim. The system worked accordingly to specification and quite satisfactory. The automatic phase change –over switch is relatively affordable and reliable. It is easy to operate, and it provides a high level of power supply when there are power outages. Finally, it reduces stress associated with `manual changes –over.  

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CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of"construction of automatic phase changer"is also available. Order full work to download. Chapter two of"construction of automatic phase changer"consists of the literature review. In this chapter all the related work on"construction of automatic phase changer"was reviewed.

CHAPTER THREE: The complete chapter three of"construction of automatic phase changer"is available. Order full work to download. Chapter three of"construction of automatic phase changer"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"construction of automatic phase changer"is available. Order full work to download. Chapter four of"construction of automatic phase changer" consists of all the test conducted during the work and the result gotten after the whole work

CHAPTER FIVE: The complete chapter five of"construction of automatic phase changer"is available. Order full work to download. Chapter five of"construction of automatic phase changer" consist of conclusion, recommendation and references.

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