Development of a Hybrid Automatic Power Changeover Switch with Phase Selector

Abstract

This paper presents the design and construction of a Hybrid Automatic
Power Changeover Switch with Phase Selector. The system is capable of
switching between three different sources of power supply, viz: public power
supply, generator and inverter circuit system. This design and
implementation were achieved with the use of contactors/relays to effect the
switching and at mega 328 microcontroller that is programed to compare the
voltage levels of the three-phase supply. The work was simulated using an
Electrical Control Technique Simulator (EKTS), while the phase selector was
simulated in Proteus environment to ensure it workability. The work was
tested, and results shows that it automatically switches power supply from
generator to public supply and put off the generator once there is public
power supply, it also automatically switches to an inverter or any alternative
means of power supply other than generator once there is public power
supply outage; this ensures the reliability of power supply to our loads
(equipment).