This paper presents a novel system to protect the industrial and domestic loads from over voltage and under voltage in AC mains supply. The proposed system monitors the voltage and provides a breakpoint based over voltage and under voltage tripping mechanism and protects the load. The proposed system consists of a tripping mechanism that monitors the supply voltage and trips according to the limits provided. A lamp load is used in this research work to test the effective working of proposed system

Keywords : Over Voltage, Under Voltage, Industrial Applications, Domestic Applications, Protecting System.