PD IEC/TR 60721-4-3:2002 - Page 2

Classification of environmental conditions. Guidance for the correlation and transformation of environmental condition classes of IEC 60721-3 to the environmental tests of IEC 60068. Stationary use at weatherprotected locations | Status: Current

1 Scope and object This part of IEC 60721 is a technical report dealing with the correlation and transformation of the conditions given in IEC 60721‑3‑3 to the environmental tests defined in IEC 60068‑2. An environment may consist of a number of environmental conditions such as dynamic, climatic and biological, and other effects due to chemically and mechanically active sub-stances. In this report, only dynamic and climatic conditions have been considered. The purpose of this technical report is to provide the specification writer with guidance together with a set of easy-to-use tables which correlate and transform these conditions.