Registrador de eventos anormais de tensão em instalações elétricas de baixa tensão

Abstract

This paper proposes the development of equipment that allows to measure and record short-term abnormalities in electrical installations with voltage supply of 127 volts and frequency 60 hertz. The equipment, entitled “Registrador de Eventos Anormais de Tensão em Redes Monofásicas de Baixa Tensão” operation connected to a single phase 127V/60Hz, making 20 samples per cycle, monitoring and calculating the voltage RMS. The sampled voltage values ate temporarily stored in the internal microcontroller memory, being transferred and stored permanently in an external memory along with date and time when a variation in the voltage RMS outside the limits set. These data can be downloaded to a computer via the serial communication interface and plotted on a visualization software, allowing the analysis of the signal disturbance.