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Publication details

Publication CODE Title
IEC 60721-3-9:2024 (2024-04) CLASSIFICATION OF ENVIRONMENTAL CONDITIONS - PART 3-9: CLASSIFICATION OF GROUPS OF ENVIRONMENTAL PARAMETERS AND THEIR SEVERITIES - MICROCLIMATES INSIDE PRODUCTS
 
Price Excl. VAT Total number of pages, tables and drawings
122.00 € 34.
Description
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.
Class  C990  (IEC PUBLICATIONS IEC PUBLICATIONS)
Available files
EN/FR version

Status
Status IEC PUBLICATION
Situation Currently active
Replaces  IEC 60721-3-9:1993
Replaces  IEC 60721-3-9:1993/AMD1:1994
Replaces  IEC 60721-3-9:1993/AMD1:1994/COR1:1995
Origin
Committee TC 104
ENVIRONMENTAL CONDITIONS, CLASSIFICATION AND METHODS OF TEST (replace COM 50-50A-50B and 75) (see 70+104 !)
Responsible Monsieur DE LEEUW Thierry, Technical Officer
Diamant Building Bd Auguste Reyers, 80
1030  BRUXELLES
Phone: +32 2 706 85 72
E-mail: thierry.deleeuw@ceb-bec.be
Approval
BEC Approval 2024-04-11
ICS-Code (International Standards Classification) 19.040
NBN Status New
IEC publication date 2024-04-11
IEC stability date 2028-12-31
IEC file modification date 2024-04-11
IEC last modification date 2024-04-11