Estimação dos Níveis de Energia Incidente em Transformador de Distribuição para Definição de Estratégias de Proteção Térmica ao Trabalhador

  • Marina Camponogara Universidade Federal de Santa Maria, Santa Maria, RS
  • Daniel P. Bernardon Universidade Federal de Santa Maria, Santa Maria, RS
  • Tiago B. Marchesan Universidade Federal de Santa Maria, Santa Maria, RS
  • Fernando C. Pepe
  • Gilnei J. G. dos Santos CPFL Energia, Campinas, SP
  • Lucas M. de Chiara
Keywords: Electric arc, Garments, IEEE Std 1584, Incident energy, PPE, NFPA 70E


The electric arc can reach temperatures above 20,000 ºC and, therefore, the thermal risk is considered the most representative risk of this type of event. The energy released by the electric arc, called incident energy, measures arc’s severity and it is used to define the thermal protection strategies applicable to the worker who performs activities in this type of scenario. The present work presents the process to define personal protection strategies against electric arc’s thermal effects from the estimation of the incident energy levels in a distribution transformer. The incident energy estimation is based on the mathematical model proposed by the IEEE Std 1584-2018 and the definition of garments and PPE is based on the guidelines provided by NFPA 70E-2021.