DGUV Information 203-077e - Thermal hazards due to electric fault arcing Guide for selecting Personal protective equipment

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Abschnitt 4.1 - 4 Procedures for selecting PPEaA
4.1 Overview of the estimation process

The first step is to estimate the electric arc energy Warc converted at the workplace in the event of a fault. This is then compared with the protection level (equivalent arc energy) Warc, prot, up to which PPEaA provides protection, while accounting for the geometry of the installation and the working distance.

The estimation process for an AC installation is described in Section 4.2. The approach described in Section 4.2 can also be applied in a figurative sense to the estimation process for DC installations. Particular aspects that apply specifically to DC systems, however, are described in Section 4.3.