DESIGN AND IMPLEMENTATION OF AUTOMATIC THREE PHASE SELECTOR SWITCH
ABSTRACT
Automatic 3 phase selector switch is a replacement of 3 phase manual change over cut fuse from one cut out to another. Automation 3 phase selector switch has an input of 3 phases from PHCN but has one output that supply current to the load. The device monitors the voltage supply of each phase (Red, yellow and blue) when theirs power failure in a particular phase it will automatically change over to another where their is voltage supply and also monitors the amount of voltage in each phase and select the voltage that is more higher than others and give it out as a single phase power supply. Automatic 3 phase selector switch help to minimize the stress of operating a change over switch from one phase   to another manually, and also the risk of been electrocuted.
CHAPTER ONE
INTRODUCTION
1.0Â Â BACKGROUND OF THE SEMINAR
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.
