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

IEC 60721-3-3:2019 classifies groups of environmental parameters and their severities to which products are subjected when installed for stationary use at weatherprotected locations.
This third edition cancels and replaces the second edition published in 1994, Amendment 1: 1995 and Amendment 2:1996. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Clause 3: definitions aligned with IEC 60721-3-1.
b) Clause 4: aligned with IEC 60721-3-1.
c) Clause 5: Clause A.3 has been incorporated into Clause 5.
d) Subclause 5.2: all existing climate classes have been replaced by completely new classes. The new classes are divided into two groups. The reason for the new classes is the latest revision of IEC 60721-2-1 which incorporates new climate types.
e) Subclause 5.3: addition of a new class for low air pressure.
f) Defined values of chemically active substances are now by reference to ISO 9223.
g) Subclause 5.6: all existing classes for mechanically active substances have been replaced by completely new classes, in alignment with IEC 60721-3-1.
h) Subclause 5.7: all existing classes for mechanical conditions have been replaced by completely new classes, in alignment with IEC 60721-3-1.
i) Table 1: new climatic classes with new severities.
j) Table 2: new class for low air pressure.
k) Table 4: new mechanically active substances classes.
l) Table 5: new mechanical conditions classes.
m) Annex A: revised and includes a clean climatogram.
n) Annex B: revised and includes the definition of seismic environment.
o) All classes regarding fire, all combined classes, all chemically active substances classes, Clause A.2, Annexes C, D and E have been removed.

Classification des conditions d'environnement - Partie 3-3: Classification des groupements des agents d'environnement et de leurs sévérités - Utilisation à poste fixe, protégé contre les intempéries

L’IEC 60721-3-3:2019 classifie les groupements d’agents d’environnement et leurs sévérités, auxquels sont soumis des produits montés pour une utilisation à poste fixe dans des emplacements protégés contre les intempéries.
Cette troisième édition annule et remplace la deuxième édition parue en 1994, ainsi que son amendement 1:1995 et son amendement 2:1996. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) Article 3: alignement des définitions sur l’IEC 60721-3-1.
b) Article 4: alignement sur l’IEC 60721-3-1.
c) Article 5: intégration de l'Article A.3 dans l’Article 5.
d) Paragraphe 5.2: toutes les catégories climatiques ont été remplacées par des catégories totalement nouvelles. Ces nouvelles catégories sont divisées en deux groupes. La création de nouvelles catégories est justifiée par la dernière révision de l’IEC 60721-2-1 qui intègre de nouveaux types de climats.
e) Paragraphe 5.3: ajout d'une nouvelle catégorie pour la basse pression atmosphérique.
f) Les valeurs définies des substances chimiquement actives font désormais référence à l’ISO 9223.
g) Paragraphe 5.6: toutes les catégories existantes pour les substances mécaniquement actives ont été remplacées par des catégories totalement nouvelles, avec alignement sur l’IEC 60721-3-1.
h) Paragraphe 5.7: toutes les catégories existantes pour les conditions mécaniques ont été remplacées par des catégories totalement nouvelles, avec alignement sur l’IEC 60721-3-1.
i) Tableau 1: nouvelles catégories climatiques avec de nouvelles sévérités.
j) Tableau 2: nouvelle catégorie pour la basse pression atmosphérique.
k) Tableau 4: nouvelles catégories pour les substances mécaniquement actives.
l) Tableau 5: nouvelles catégories pour les conditions mécaniques.
m) Annexe A: révision et introduction d'un climatogramme propre.
n) Annexe B: révision et introduction de la définition de l'environnement sismique.
o) Toutes les catégories relatives au feu, toutes les catégories combinées, toutes les catégories des substances chimiquement actives, l'Article A.2, les Annexes C, D et E ont été supprimés.

General Information

• Status: Published
• Publication Date: 21-May-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 19.040 - Environmental testing
• Technical Committee: TC 104 - Environmental conditions, classification and methods of test
• Drafting Committee: MT 19 - TC 104/MT 19
• Current Stage: PPUB - Publication issued
• Start Date: 21-Jun-2019
• Completion Date: 22-May-2019

Relations

• Revises: IEC 60721-3-3:1994/AMD2:1996 - Amendment 2 - Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 3: Stationary use at weatherprotected locations
• Effective Date: 05-Sep-2023
• Revises: IEC 60721-3-3:1994 - Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 3: Stationary use at weatherprotected locations
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60721-3-3 ®
Edition 3.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of environmental conditions –
Part 3-3: Classification of groups of environmental parameters
and their severities – Stationary use at weatherprotected locations

Classification des conditions d'environnement –
Partie 3-3: Classification des groupements des agents d'environnement et de
leurs sévérités – Utilisation à poste fixe, protégé contre les intempéries

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IEC 60721-3-3 ®
Edition 3.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of environmental conditions –

Part 3-3: Classification of groups of environmental parameters

and their severities – Stationary use at weatherprotected locations

Classification des conditions d'environnement –

Partie 3-3: Classification des groupements des agents d'environnement et de

leurs sévérités – Utilisation à poste fixe, protégé contre les intempéries

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-6954-1

– 2 – IEC 60721-3-3:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions. 5
4 General . 6
5 Classification of groups of environmental parameters and their severities . 7
5.1 General . 7
5.2 Climatic conditions (K) . 7
5.3 Special climatic conditions (Z) . 8
5.4 Biological conditions (B) . 8
5.5 Chemically active substances (C) . 8
5.6 Mechanically active substances (S) . 8
5.7 Mechanical conditions (M) . 9
Annex A (informative) Interdependence of air temperature, relative air humidity, and
absolute air humidity . 11
Annex B (informative) Definition of seismic environment . 12
Bibliography . 14

Figure A.1 – Climatogram of interdependence of air temperature, relative air humidity,
and absolute air humidity . 11

Table 1 – Classification of climatic conditions . 9
Table 2 – Classification of special climatic conditions . 10
Table 3 – Classification of biological conditions . 10
Table 4 − Classification of mechanically active substances . 10
Table 5 − Classification of mechanical conditions . 10
Table B.1 – Correlation of seismic zones with expected magnitudes . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CLASSIFICATION OF ENVIRONMENTAL CONDITIONS –

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

FOREWORD
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International Standard IEC 60721-3-3 has been prepared by IEC technical committee 104:
Environmental conditions, classification, and methods of test.
This third edition cancels and replaces the second edition published in 1994, Amendment 1:
1995 and Amendment 2:1996. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Clause 3: definitions aligned with IEC 60721-3-1.
b) Clause 4: aligned with IEC 60721-3-1.
c) Clause 5: Clause A.3 has been incorporated into Clause 5.

– 4 – IEC 60721-3-3:2019 © IEC 2019
d) Subclause 5.2: all existing climate classes have been replaced by completely new classes.
The new classes are divided into two groups. The reason for the new classes is the latest
revision of IEC 60721-2-1 which incorporates new climate types.
e) Subclause 5.3: addition of a new class for low air pressure.
f) Defined values of chemically active substances are now by reference to ISO 9223.
g) Subclause 5.6: all existing classes for mechanically active substances have been replaced
by completely new classes, in alignment with IEC 60721-3-1.
h) Subclause 5.7: all existing classes for mechanical conditions have been replaced by
completely new classes, in alignment with IEC 60721-3-1.
i) Table 1: new climatic classes with new severities.
j) Table 2: new class for low air pressure.
k) Table 4: new mechanically active substances classes.
l) Table 5: new mechanical conditions classes.
m) Annex A: revised and includes a clean climatogram.
n) Annex B: revised and includes the definition of seismic environment.
o) All classes regarding fire, all combined classes, all chemically active substances classes,
Clause
...