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Design And Construction Of An Automatic Phase Selector
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CHAPTER ONE
INTRODUCTION
1.1 Background of the Study
Public
power supply is a major contributor to economic development in every
nation. In developing nations like Nigeria, Ghana, Cote d’Ivoire and
under developed parts of the world, the public power supply for
industrial, commercial and domestic use is highly unstable (Peter,
2002). This has negative effect on the economy in such that most of them
had to depend on frequent use of alternative power sources such as
generator, inverter, solar to meet up with the energy demands. One of
the common alternate sources depended on is the use of generator set
which is usually connected to a changeover switch and the public power
supply also connected to the switch also. The application of alternative
sources of power supply is being faced with the challenge of switching
smoothly and timely between the mains supply and the generator supply
whenever there is power failure on the mains source and vice versa.
(Ransorne, 2009).
Automatic Changeover switch with generator cut off
and starter is one of the electrical devices that can aid smooth
switching from public supply to generator and vice versa. It
automatically switches from one power source to another. When there is
power failure in the public supply it starts the generator and switches
to the supply (generator) and it equally switches over to the mains
supply when power is restored and turns off the generator automatically.
The automatic power changeover switchwith generator cut off and starter
is a device that links the load and mains supply or the alternative
supply together. This enables the use of either the mains supply or an
alternative source when there is outage on the mains source without the
user intervention. The changeover switch can either come in with three
phase or single phase. This device maintains constant power supply to
the load by automatically activating the generator when there is need.
Since the user might not always be in need of the generator, provision
has been made to prevent the generator from starting should an outage
occur. Therefore, in view of these considerations, the project aimed at
designing and constructing a workable automatic change-over switch with
generator cut off and starter functions.
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ABSRACT - [ Total Page(s): 1 ]Automatic phase selector system is used to ensure continuous supply to load in case the mains supply is not healthy. This project is on design and construction of a three phase automatic phase selector with generator starter and cut-off. Power supply in Nigeria and most developing countries of the world is anything but stable. This has adverse effects on the consumers of the electricity and the equipments that are operated from the mains sources of electricity supply in these parts of the world. ... Continue reading---
