prBAS EN IEC 60721-3-9:2025
Classification of environmental conditions - Part 3-9: Classification of groups of environmental parameters and their severities - Microclimates inside products
General information
Status:Project
Number of pages:37
Adoption method:Proglašavanje
Language:engleski,francuski
Edition:2.
Realization date:31.10.2025
Forseen date for next stage code:03.11.2025
Technical committee:BAS/TC 64, VS2 - Electrotechnical standardization
ICS:
19.040, Environmental testing
Abstract
IEC 60721-3-9:2024 classifies groups of microclimatic conditions, to which components (basic parts, assemblies, built-in units) can be subjected inside products, which are used under the climatic conditions as classified in IEC 60721-3-3 and IEC 60721-3-4.
This second edition cancels and replaces the first edition published in 1993, Amendment 1:1994 and Corrigendum 1:1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 2 has been updated;
b) Clause 4 has been re-edited and simplified;
c) Annex A has been revised and updated;
d) a new Annex B has been added and gives the origin of the constitutional diagram for humid air, which is the basis of drawing the climatogram for a microclimate.
Lifecycle
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Original document and degree of correspondence
EN IEC 60721-3-9:2024, identical
IEC 60721-3-9:2024, identical
Relation to BAS standards
Work material
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