DS/EN IEC 60721-3-3:2019

Classification of environmental conditions - Part 3-3: Classification of groups of environmental parameters and their severities - Stationary use at weatherprotected locations

This section of IEC 60721-3 classifies groups of environmental parameters and their severities to *which products are subjected when installed for stationary use at *weather-protected locations.**The environmental conditions specified in this standard are limited to those which may directly *affect the performance of products. Only environmental conditions as such are considered. No *special description of the effects of these conditions on the products is provided.**Environmental conditions directly related to explosion hazards, microclimate within * a product, fire extinction and ionizing radiation are excluded. Any other unforeseen *incidents are also excluded. The possibility of their occurrence should be considered as *special cases. This standard does not cover equipment covered by building standards, codes or *regulations.**Conditions of stationary use at non-weatherprotected locations, portable and *non-stationary use, use in vehicles and ships, conditions of storage and transportation, *and microclimates inside products are given in other sections of IEC 60721-3.**A limited number of classes of environmental conditions is given, covering a broad *field of application. The user of this standard should select the lowest classification *necessary for covering the conditions of the intended use.*