IEC 60870-2-2:1996

Telecontrol equipment and systems - Part 2: Operating conditions -Section 2: Environmental conditions (climatic, mechanical and othernon electrical influences)

IEC 60870-2-1:1995

Telecontrol equipment and systems - Part 2: Operating conditions - Section 1: Power supply and electromagnetic compatibility

IEC 60949:1988

Calculation of thermally permissible short-circuit currents, taking into account non-adiabatic heating effects