Análise da confiabilidade de sistemas elétricos em ambientes industriais - estudo de caso

Abstract

This study aims to analyze the reliability of electrical systems in an industrial environment by identifying the main failures, their causes, and their impacts on production. The research was conducted in a large-scale factory located in Uberlândia, Minas Gerais, using real operational and maintenance data. Methodologies such as Failure Modes and Effects Analysis (FMEA), Fault Tree Analysis (FTA), and the calculation of Mean Time Between Failures (MTBF) were applied to map vulnerabilities in the electrical system and propose improvements to maintenance strategies. The results indicated that the most frequent failures are associated with short-duration voltage variations (VTCD), often caused by external factors such as lightning strikes and short circuits. The predominance of corrective maintenance has led to high operational costs and increased equipment downtime. As solutions, the implementation of continuous monitoring systems, a review of preventive maintenance intervals, and the strengthening of predictive maintenance practices are proposed. The adoption of these strategies has the potential to enhance electrical system reliability, reduce operational costs, and minimize production impacts.