SN EN 60721-3-4 : 1995 AMD 1 1997

Committees responsible
National foreword
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. Interdependence of air temperature, relative
     humidity and absolute humidity
C. Examples of practical application of the
     classification specified in this standard
D. Summary of conditions covered by sets of class
     combinations
ZA. (normative) 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 locations which are non-weatherprotected. Limited to those which may directly affect the performance of products. No special description of the effects of these conditions on the products is given. Environmental conditions directly related to fire or explosion hazards and conditions related to ionizing radiation are excluded. Microclimate within a product is not included.