ABSTRACT

An automatic changeover switch for three phase selectors has been developed to enable seamless transitions between the Benin Electricity Distribution Company (BEDC) phase supplies and generator power sources. In a world increasingly reliant on diverse energy sources whiles being plagued with constantly fluctuating power supply, the device offers a practical solution to power source management challenges. The methods employed in constructing the switch involve the use of relays, microcontrollers, and a sensor circuit consisting of a transformer, capacitor, bridge diodes and Zener diodes as main components of the system. Integrated within the automatic changeover switch are user interface elements, including buttons, a liquid crystal display (LCD), and light emitting diode (LED) setups. The LEDs serve to signify various device status, the buttons facilitate user settings and configuration, while the LCD communicates the active power source and its respective output voltage. Extensive testing validates the functionality of the power supply, LED and button circuits, relay system, and microcontroller-based control unit. The device enhances power reliability in residential, commercial, and critical infrastructure settings, providing a reliable and adaptable means of managing power sources while promoting energy convenience and time retention.