EN 60721-3-3 : 95 AMD 2 97

Foreword
1. Scope
2. Normative references
3. Definitions
4. General
5. Classification of groups of environmental parameters
     and their severities
6. Sets of environmental condition class combinations
Tables
Figure
Annexes
A. Survey of conditions affecting the choice of
     environmental parameters and their severities
B. Climatograms
C. Examples for practical application of the
     classification specified in this standard
D. Summary of conditions covered by sets of class
     combinations
E. (normative) Explanation of the environmental conditions in
     tropical areas as specified in classes 3K9 and 3K10
ZA. (informative) Other international publications quoted
     in this standard with the references of the relevant
     European publications

Specifies groups of environmental parameters and their severities to which products are subjected when mounted for stationary use at weatherprotected locations. Limited to those which may directly affect the performance of products. No special description of the effects of these conditions is given. Environmental conditions directly related to ionizing radiation are excluded. Any other unforeseen incidents are also excluded. Microclimate within a product is not included.