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Medium-voltage – Power distribution. Power Generation. Energy automation and smart grid. TechTopics. Product support. Energy Mastering the challenges of changing energy systems Energy systems are changing – fundamentally and fast. The importance of individual energy sources and options for power generation are changing, as are the ways in ...

Updating Older Systems to Reduce Arc Flash Hazards. Figure 1 – Typical Substation Configuration. In this example, the primary medium voltage fuse provides the protection for the substation, which results in an incident energy result well above 40 cal/cm 2 —creating the environment for arc flash hazards. This value is high due to (1) the ...

Mitigating arc flash hazards Arc flash studies are a valuable part of implementing an NFPA 70E program. However, putting arc flash labels on electrical equipment is not the only step needed to protect electrical workers. Most arc flash studies will identify electrical equipment with incident energy at a given distance.