SIST EN 60721-2-2:2013

Classification of environmental conditions - Part 2-2: Environmental conditions appearing in nature - Precipitation and wind

This part of IEC 60721 presents fundamental properties, quantities for characterization, and a classification of environmental conditions dependent on precipitation and wind relevant for electrotechnical products. It is intended to be used as background material when selecting appropriate severities of parameters related to precipitation and wind for product applications. When selecting severities of parameters related to precipitation and wind for product application, the values given in IEC 60721-1 should be applied.

Klassifizierung von Umweltbedingungen - Teil 2-2: Natürliche Einflüsse - Niederschlag und Wind

Classification des conditions d'environnement - Partie 2-2: Conditions d'environnement présentes dans la nature - Précipitations et vent

La CEI 60721-2-2:2012 présente les propriétés fondamentales, les grandeurs de caractérisation et une classification des conditions d'environnement dépendant des précipitations et du vent en ce qui concerne les produits électrotechniques. Cette deuxième édition annule et remplace la première édition, publiée en 1988, et constitue une révision technique. Les modifications principales par rapport à l'édition précédente sont les suivantes:  - paragraphe Précipitations: simplifié et les données dont la validation est impossible sont supprimées;  - paragraphe Vent: texte de nouveau rédigé;  - Tableau 1 simplifié et aligné avec la définition utilisée par [1];  - paragraphe Grêle: données ajoutées; modification de formule;  - ajout d'une formule de l'énergie d'impact;  - paragraphe Neige: texte modifié et aligné avec les définitions utilisées par [1];  - Tableau 3 retiré;  - paragraphe Pluie normale: modification du texte et suppression de valeurs numériques;  - paragraphe Pluie battante: modification du texte et suppression de valeurs numériques;  - paragraphe Formation de glace: modification du texte et suppression de valeurs numériques;  - paragraphe Neige transportée: ajout de texte;  - paragraphe Force du vent: modification de formule;  - suppression des Figures 1 à 5.

Klasifikacija okoljskih pogojev - 2-2. del: Okoljski pogoji v naravi - Padavine in veter

Ta del standarda IEC 60721 navaja temeljne lastnosti, količine za karakterizacijo ter klasifikacijo okoljskih vplivov, odvisno od padavin in vetrovnih razmer, ki vplivajo na delovanje elektrotehničnih proizvodov. Uporablja se kot dodatni material pri izbiri ustreznih stopenj parametrov v zvezi s padavinami in vetrom za uporabo proizvoda. Pri izbiri stopenj parametrov v zvezi s padavinami in vetrom za uporabo proizvoda je treba uporabiti vrednosti, podane v standardu IEC 60721-1.

General Information

• Status: Published
• Publication Date: 27-Aug-2013
• ICS: 19.040 - Environmental testing
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 27-Aug-2013
• Due Date: 01-Nov-2013
• Completion Date: 28-Aug-2013
• Ref Project: EN 60721-2-2:2013 - Classification of environmental conditions - Part 2-2: Environmental conditions appearing in nature - Precipitation and wind

Relations

• Replaces: SIST HD 478.2.2 S1:2003 - Classification of environmental conditions -- Part 2: Environmental conditions appearing in nature -- Precipitation and wind
• Effective Date: 12-Apr-2011
• Replaces: SIST HD 478.2.2 S1:2003 - Classification of environmental conditions -- Part 2: Environmental conditions appearing in nature -- Precipitation and wind
• Effective Date: 28-Jan-2023
• Revised: SIST HD 478.2.2 S1:2003 - Classification of environmental conditions -- Part 2: Environmental conditions appearing in nature -- Precipitation and wind
• Effective Date: 06-May-2014

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60721-2-2:2013
01-oktober-2013
1DGRPHãþD
SIST HD 478.2.2 S1:2003
Klasifikacija okoljskih pogojev - 2-2. del: Okoljski pogoji v naravi - Padavine in
veter
Classification of environmental conditions - Part 2-2: Environmental conditions appearing
in nature - Precipitation and wind
Klassifizierung von Umweltbedingungen - Teil 2-2: Natürliche Einflüsse - Niederschlag
und Wind
Classification des conditions d'environnement - Partie 2-2: Conditions d'environnement
présentes dans la nature - Précipitations et vent
Ta slovenski standard je istoveten z: EN 60721-2-2:2013
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
SIST EN 60721-2-2:2013 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60721-2-2:2013

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SIST EN 60721-2-2:2013

EUROPEAN STANDARD
EN 60721-2-2

NORME EUROPÉENNE
August 2013
EUROPÄISCHE NORM

ICS 19.040 Supersedes HD 478.2.2 S1:1990


English version


Classification of environmental conditions -
Part 2-2: Environmental conditions appearing in nature -
Precipitation and wind
(IEC 60721-2-2:2012)


Classification des conditions Klassifizierung von
d'environnement - Umgebungsbedingungen -
Partie 2-2: Conditions d'environnement Teil 2-2: Natürliche
présentes dans la nature - Umgebungsbedingungen -
Précipitations et vent Niederschlag und Wind
(CEI 60721-2-2:2012) (IEC 60721-2-2:2012)





This European Standard was approved by CENELEC on 2013-01-17. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60721-2-2:2013 E

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SIST EN 60721-2-2:2013
EN 60721-2-2:2013 - 2 -

Foreword
The text of document 104/583/FDIS, future edition 2 of IEC 60721-2-2, prepared by IEC TC 104
"Environmental conditions, classification and methods of test" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 60721-2-2:2013.
The following dates are fixed:
• latest date by which the document has (dop) 2014-02-02
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-01-17
• latest date by which the national
standards conflicting with the

document have to be withdrawn

This document supersedes HD 478.2.2 S1:1990.
EN 60721-2-2:2013 includes the following significant technical changes with respect to
HD 478.2.2 S1:1990:
– subclause Precipitation: simplified; data not possible to validate are removed;
– subclause Wind: text rewritten;
– Table 1 simplified and aligned with definition used by [1];
– subclause Hail: data added; formula changed; formula for impact energy added;
– subclause Snow: text changed and aligned with definitions used by [1];
– Table 3 removed;
– subclause Normal rain: text has been modified and numeric values removed;
– subclause Driving rain: text has been modified and numeric values removed;
– subclause Formation of ice: text has been modified and numeric values removed;
– subclause Drifting snow: text added;
– subclause Wind force: formula changed;
– Figures 1 to 5 removed.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 60721-2-2:2012 was approved by CENELEC as a European
Standard without any modification.

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SIST EN 60721-2-2:2013
- 3 - EN 60721-2-2:2013

Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 60721-1 - Classification of environmental conditions - EN 60721-1 -
Part 1: Environmental parameters and their
severities

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SIST EN 60721-2-2:2013

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SIST EN 60721-2-2:2013



IEC 60721-2-2

®


Edition 2.0 2012-12




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Classification of environmental conditions –

Part 2-2: Environmental conditions appearing in nature – Precipitation and wind




Classification des conditions d'environnement –

Partie 2-2: Conditions d'environnement présentes dans la nature – Précipitations

et vent















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX M


ICS 19.040 ISBN 978-2-83220-570-9



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60721-2-2:2013
– 2 – 60721-2-2 © IEC:2012
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General . 5
4.1 Introductory remark . 5
4.2 Precipitation . 5
4.3 Wind . 6
5 Characteristics . 6
5.1 Rain . 6
5.2 Hail . 7
5.3 Snow . 8
5.4 Wind . 8
6 Classification . 8
6.1 General . 8
6.2 Normal rain . 8
6.3 Driving rain . 9
6.4 Formation of ice . 9
6.4.1 General . 9
6.4.2 Air hoar . 9
6.4.3 Rime . 9
6.4.4 Clear ice . 9
6.4.5 Glaze ice . 9
6.4.6 Process of ice formation . 9
6.5 Hail . 10
6.6 Snow load . 10
6.7 Drifting snow . 10
6.8 Wind force . 10
Bibliography . 12

Table 1 – Characteristics of rain (average over long periods) . 6
Table 2 – Characteristics of hailstones . 8

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SIST EN 60721-2-2:2013
60721-2-2 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

CLASSIFICATION OF ENVIRONMENTAL CONDITIONS –

Part 2-2: Environmental conditions appearing in nature –
Precipitation and wind

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60721-2-2 has been prepared by IEC technical committee 104:
Environmental conditions, classification and methods of test.
This second edition cancels and replaces the first edition, published in 1988, and constitutes
a technical revision.
The main changes with regard to the previous edition are as follows:
– subclause Precipitation: simplified; data not possible to validate are removed;
– subclause Wind: text rewritten;
1
– Table 1 simplified and aligned with definition used by [1] ;
– subclause Hail: data added; formula changed; formula for impact energy added;
———————
1
 References in square brackets refer to the Bibliography.

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SIST EN 60721-2-2:2013
– 4 – 60721-2-2 © IEC:2012
– subclau
...