DESIGN AND CONSTRUCTION OF MICROCONTROLLER BASED AUTOMATIC THREE PHASE CHANGE-OVER AND GENERATORSTARTEWSTOPPER

Abstract

The main aim of any electric power supply in the world is to provide uninterrupted power :;upply at all times to all its consumers. Although, in developing countries, the electric power generated to meet the demands of the growing consumers of electricity is insufficient, hence power instability. This project is a design of an automatic changeover switch. This means that when there is any mains failure, the automatic changeover switch will change to an alternative power supply (Generator), and back to the main supply when it is restored. The purpose of this project is to maintain constant supply to the main circuit that is being supplied by making-up for the time lapse or delay that usually accompanies the manual switching from one source to another. The design comprises of the power connection circuit and control connection circuit. The main components to be used include; contactors, relays and timer vi