CHAPTER ONE
INTRODUCTION
1.0 BACKGROUND OF THE STUDY
Initially, 3-phase voltage selector system invented manually with operating process of time wasted and inconvenience. The interest of automatic 3-phase voltage selector system is on the fact that technology advancement has made it possible to minimize cost, hard labor and time wasted, and also improves the reliability of our electrical and electronics system. Therefore with the help of electromechanical switching system through the principle of solenoid, a system has been designed such that electromechanical device like a relay and contactor is arranged to automatically change from one phase to other without human intervention. This design is of high efficiency and very accurate in its performance, this is because switching is done by automation without time delay. The 3-phase automatic voltage selector system uses reliable electrical/electronics components such as relay transformers, contactor, diode capacitor, resistor and other switching component.
The operation of this device is that when there is a failure in any of the each line thereby leading to a no output voltage, it select automatically to other phase without time delay. This project is applicable in homes, factories, corporate offices and commercial business center. This system also transfers maximum power to the load.
1.1 AIMS AND OBJECTIVES OF STUDY
The objective and aim of this research is as follows:
I. To select automatically a voltage that is present in power line.
II. To avoid stress and inconvenience in selecting of phase voltage.
III. To build a system that can be able to choose any voltage that appear to be of high potential among other voltage.
1.2 SIGNIFICANCE OF THE STUDY
This research work is important in various ways
(a) To Individual: It helps to avoid the stress of working and selection of phases if there is a failure in any of the available phase.
(b) To Student (i) It helps to lay a foundation of research work about the automatic 3-phase voltage selector system.
ii. It also helps the student to research about a related topic.
(c) To Society: It also shows technological advancement in power system voltage control.
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