Development of a Single Phase Automatic Change Over Switch

Abstract

Most industrial and commercial processes are dependent on electrical power. In the event of power interruptions, the change-over from power supplied by a public utility to a generator is usually performed manually, resulting in wasted time. Moreover, machine damage sometimes occurs because of human errors. These can cause significant financial losses. This paper presents the design and construction of an automatic phase change-over switch that switches electrical power supplied from public supply to generator in the event of a power outage or insufficient voltage. The system uses an electronic control circuit involving integrated circuits, transistors and electromechanical devices.