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Design of a Pure Transistorized Voltage Protector for SinglePhase Electrical Installations

In this paper, an electronic device is designed to protect single phase electrical equipment against overvoltage and undervoltage conditions. The protector is designed using pure transistorized circuitry to detect and offer the required protection against unwanted voltage fluctuations. The case study is the protection of 220V 50Hz electrical installations in the range of 220V±22V at the same 50Hz operating frequency. The device is designed and tested on PSpice using low cost electronic devices available on PSpice libraries. Simulation results have accomplished the desired protection during managing a variable voltage sweep starting from possible minimum voltage level to maximum voltage level. .