Segurança do Trabalho em Subestações Elétricas : um estudo das normas vigentes com ênfase na Norma Regulamentadora Nº 10 (NR – 10)

Abstract

The work safety in Brazil came with the creation of the Consolidated Labor Laws (CLT) in the 1970s, when the first regulatory norms (NRs) were also created. The NR-10 rule, for example, discusses about safety in electrical installations and was last updated in 2016. However, doubts about applying the rule to working environments that deal with electricity, such as electrical substations, are still found today. The aim of this study is to present in a practical way and to clarify the main points of the safety rules for working with electricity, especially NR-10, in order to become a guide that can be consulted by substation employees and employers from Brazil, especially of Ceará. The information presented was extracted and interpreted mainly from NR-10, but also from other NRs and ABNT (Associação Brasileira de Normas Técnicas) norms. Several topics related to work safety in electrical substations were addressed, starting with an explanation of the different types of substation and the equipment that compose them, as well as the regulation regarding the sector. Safe procedures for dealing with high voltages such as de-energizing and grounding, fire protection and safety signaling have also been seen. In addition, mandatory documentation for substation electrical interventions and aspects prescribed by the concessionary of electricity of Ceará for approval of substation projects in the state were also analyzed. This work has the potential to assist in the awareness of employees and employers of electrical substations regarding the application of safety standards related to this segment, especially of NR-10, and thus to contribute to the reduction of the number of occupational accidents in this environment.