Implementation of over-voltage & undervoltage protection system

Abstract

Overvoltage and undervoltage are quality problems, they happen due to many reasons. The effects of overvoltage and undervoltage can be severe and can cause insulation failure in case of overvoltage and overheating and burning of motors coils in case of undervoltage. To solve the problem a tripping mechanism is designed to disconnect the load when subjected to overvoltage, undervoltage or imbalance operation in case of three phase equipments. The design is first simulated in a virtual environment using a simulation program, and then a hardware design is made according to the simulated circuit. Two designs are made single phase and three phase, only the single phase is designed as hardware. The circuits responded effectively to voltage variations whether it’s under or over voltage in case of single phase circuit, and overvoltage, undervoltage, phase failure and imbalance operation in case of three phase circuit. The liquid crystal display shows the operation status of the system whether it is operating normally or under faulted condition.