A importância da manutenção preventiva de subestações na previsão e eliminação de problemas futuros: um estudo de caso

Abstract

This work presents an explanation of the process of maintaining 15 kV substations, in order to prevent problems that might interrupt the perfect functioning of the same. Will be presented some of the types of problems more questions that relate to distribution substations when these are not subject to the due processes specific to maintenance. Such problems are coming from the most varied factors, such as, surges, lightning, contamination of the oil, among others, which cause serious failures that inhibit the perfect functioning of the transformer. It will be approached also in respect of the equipment used in the maintenance process, such as, Megômetro, Terrômetro, besides the energy analyzer, so that will be addressed part of the processes that are performed during routine maintenance of a substation. Finally, you will be presented with a case study, which will be based on the substation maintenance agency of the Caixa Econômica Federal Bezerra de Menezes, located in Fortaleza, which will serve as a basis for the practical understanding of the processes mentioned in the course of this work. In advance, said that the results obtained in most tests were meeting with the required before the standards, such as insulation resistance measurements that have reached value above the minimum required by the NBR 7036, as well as the values obtained through the test of termovisão for the transformer unit. The values measured during the process of analysis of energy also fit the criteria required by the PRODIST 8 module.