This guide breaks down how to handle voltages across brazilian cities, how to check before you plug, and exactly what gear to bring so your phone, hairdryer, and camera survive the trip without a meltdown. The useful technical facts: Brazilian mains power runs at 60Hz across the. Neoenergia Brasília interrupted power supply for safety reasons; no one was injured. The MCTI (Ministry of Science, Technology and Innovation), in Brasília (DF), suffered a blackout on the morning of this Thursday (19) after a fire broke out in a power substation that supplies the building. Despite. In the field of occupational safety in Brazil, few standards carry as much weight and importance as NR-10, the Brazilian regulatory standard for electrical installations and services. Whether optimizing a factory"s load shifting or creating neighborhood microgrids,.