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[ I_th = \sqrt\fracK^2 \cdot S^2t \cdot \epsilon ]

A: The standard is written for AC systems. For DC, refer to IEC 61660-1 (short-circuit currents in DC auxiliary installations). Iec 60949 Pdf Free Download

: Calculate a correction factor that accounts for heat dissipation into surrounding materials (like insulation or soil). Final Current [ I_th = \sqrt\fracK^2 \cdot S^2t \cdot \epsilon

Free versions are often missing crucial amendments or tables. Iec 60949 Pdf Free Download