Análise do SPDA do refeitório do IFG-Campus Itumbiara à luz da NBR 5419/2015: estudo de caso

Abstract

Brazil is the country with the largest amount of atmospheric discharges in the world, reaching the mark of 77.8 million cloud-to-ground discharges per year. This number is a direct consequence of factors such as climate type, precipitation behavior and air masses, relative air humidity, height, latitude, pollution and biannual variable behavior. The potential for the occurrence of lightning strikes inside the clouds and its charging method is still being studied by the academy. Thus, two most probable aspects are studied, the induction charging and the electrification by the friction of hail, graupel and ice crystals. In addition, the physical process for the initiation of lightning, a concept studied for 250 years, has not yet been completely defined. However, the occurrence of lightning discharges is an observable reality and in the Brazilian case presents a real risk to life, structure, equipment and services. Thus, the Brazilian Association of Technical Standards, through NBR 5419, standardizes actions of protection within the Brazilian territory. In 2015, this standard received an update and concepts related to risk analysis were added, as well as the essential characteristics of the Lightning Protection System (LPS). The refectory installed at IFG Campus Itumbiara had its LPS built based on NBR 5419 of 2005 and, until then, it has not been updated. Consequently, this thesis works on the case study in the analysis and adequacy of the LPS of the refectory considering the characteristics of NBR 5419 of 2015.