STM PDF
Amendment 1 - Classification of environmental conditions - Part 4-5- Guidance for the correlation and transformation of environmental condition classes of IEC 60721-3 to the environmental tests of IEC 60068 - Ground vehicle installations. Original standard IEC TR 60721-4-5-2003 in PDF full version. Additional info + preview on request
Document status: Active
Amendment 1 - Classification of environmental conditions - Part 4-6- Guidance for the correlation and transformation of environmental condition classes of IEC 60721-3 to the environmental tests of IEC 60068 - Ship environment. Original standard IEC TR 60721-4-6-2003 in PDF full version. Additional info + preview on request
Document status: Active
Amendment 1 - Classification of environment conditions - Part 4-7- Guidance for the correlation and transformation of environmental condition classes of IEC 60721-3 to the environmental tests of IEC 60068 - Portable and non-stationary use. Original standard IEC TR 60721-4-7-2003 in PDF full version. Additional info + preview on request
Document status: Active
Consideration of reference impedances and public supply network impedances for use in determining the disturbance characteristics of electrical equipment having a rated current ≤75 A per phase. Original standard IEC TR 60725-2012 in PDF full version. Additional info + preview on request
Document status: Active
Evaluation of electrical endurance of electrical insulation systems. Part 1: General considerations and evaluation procedures based on normal distributions. Original standard IEC TR 60727-1-1982 in PDF full version. Additional info + preview on request
Document status: Active
Evaluation of electrical endurance of electrical insulation systems - Part 2: Evaluation procedures based on extreme-value distributions. Original standard IEC TR 60727-2-1993 in PDF full version. Additional info + preview on request
Document status: Active