scope:

This part of IEC 60721 is a technical specification dealing with the correlation and transformation of the conditions given in IEC 60721 -3-3 to the environmental test procedures defined in IEC 60068-2. This TR recommends test procedures and test severities for electro-technical equipment operated at stationary weather protected locations for the product classes set out in 60721 -3- 3. An environment may consist of several environmental conditions such as dynamic, climatic, and biological, and other effects due to chemically and mechanically active substances. In this document, dynamic, air pressure, biological and climatic conditions have been considered. The purpose of this technical specification is to provide the specification writer with guidance together with a set of easy-to-use tables which correlate and transform these environmental conditions.