Estudo para implantação de um SPDA em uma metalúrgica

Abstract

Atmospheric discharges are climatic phenomena that occur in a natural way and that cannot be avoided from impacting in a given place, being responsible for numerous structural, economic and also life damage. Over time and with many studies on this phenomenon, it was possible to develop ways to reduce the damage caused, thus protecting the goods and lives that are inside or around the structure in question. This work has the objective of performing an analysis for the implementation of an Atmospheric Discharge Protection System (SPDA) in a company located in the Southwest region of Mato Grosso do Sul. In Brazil, the NBR 5419 standard is responsible for stipulating the minimum requirements necessary for each level of protection. After its last revision in 2015 it was divided into four parts. Through a visit to the property to be protected, the dimensions and layout of the company were surveyed, following NBR 5419­1. According to NBR 5419­2, risk analysis and management were performed, and could identify the relevant risks and losses in the structure. Subsequently, appropriate protective measures were adopted and a new risk analysis was carried out to prove the effectiveness. Then, the SPDA class was determined and the capture and descent subsystems were dimensioned, and solutions were presented for the grounding subsystem, according to NBR 5419­ 3. In the end, a scheme of the Atmospheric Discharge Protection System was presented for the company in question.