Classification of environmental conditions - Part 2-4: Environmental conditions appearing in nature - Solar radiation and temperature

NEW!IEC 60721-2-4:2018 is available as IEC 60721-2-4:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60721-2-4:2018 presents a broad division into types of solar radiation areas. It is intended to be used as part of the background material when selecting appropriate severities of solar radiation for product applications. All types of geographical areas are covered, except areas with altitudes above 5 000 m. This second edition cancels and replaces the first edition published in 1987 and Amendment 1:1988. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - Figures updated including the addition of global irradiation information - Format updated.

Klassifizierung von Umgebungsbedingungen - Teil 2-4: Natürliche Umgebungsbedingungen - Sonnenstrahlung und Temperatur

Classification des conditions d'environnement - Partie 2-4: Conditions d'environnement présentes dans la nature - Rayonnement solaire et température

NEW!IEC 60721-2-4:2018 est disponible sous forme de IEC 60721-2-4:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 60721-2-4:2018 présente une large division en types de zones de rayonnement solaire. Elle est destinée à faire partie de la documentation de base pour choisir des sévérités appropriées de rayonnement solaire pour l'application aux produits. Tous les types de zones géographiques sont couverts, sauf les zones situées à plus de 5 000 m d’altitude. Cette deuxième édition annule et remplace la première édition parue en 1987 et l'Amendement 1:1988. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: - Mise à jour des figures incluant l’ajout d’informations sur l’exposition énergétique globale - Mise à jour du format.

Klasifikacija okoljskih pogojev - 2-4. del: Okoljski pogoji v naravi - Sončno sevanje in temperatura (IEC 60721-2-4:2018)

Ta del standarda IEC 60721 podaja širšo razdelitev vrst območij sončnega sevanja. Namenjen je za uporabo kot del osnovnega gradiva pri izbiri ustreznih ravni sončnega sevanja za uporabo proizvodov.
Zajete so vse vrste geografskih območij, razen območij z nadmorsko višino več kot 5000 m.
Ta dokument se uporablja tudi za določanje mejnih ravni sončnega sevanja, ki bi jim lahko bili med prevozom, skladiščenjem in uporabo izpostavljeni proizvodi.

General Information

Status
Published
Publication Date
23-Aug-2018
Current Stage
6060 - Document made available
Due Date
25-Jun-2018

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SLOVENSKI STANDARD
SIST EN IEC 60721-2-4:2018
01-november-2018

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Classification of environmental conditions - Part 2-4: Environmental conditions appearing

in nature - Solar radiation and temperature (IEC 60721-2-4:2018)

Classification des conditions d'environnement - Partie 2-4: Conditions d'environnement

présentes dans la nature - Rayonnement solaire et température (IEC 60721-2-4:2018)

Ta slovenski standard je istoveten z: EN IEC 60721-2-4:2018
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
SIST EN IEC 60721-2-4:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60721-2-4:2018
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SIST EN IEC 60721-2-4:2018
EUROPEAN STANDARD EN IEC 60721-2-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2018
ICS 19.040
English Version
Classification of environmental conditions - Part 2-4:
Environmental conditions appearing in nature - Solar radiation
and temperature
(IEC 60721-2-4:2018)

Classification des conditions d'environnement - Partie 2-4: Klassifizierung von Umgebungsbedingungen - Teil 2-4:

Conditions d'environnement présentes dans la nature - Natürliche Umgebungsbedingungen - Sonnenstrahlung und

Rayonnement solaire et température Temperatur
(IEC 60721-2-4:2018) (IEC 60721-2-4:2018)

This European Standard was approved by CENELEC on 2018-07-27. 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, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60721-2-4:2018 E
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SIST EN IEC 60721-2-4:2018
EN IEC 60721-2-4:2018 (E)
European foreword

The text of document 104/800/FDIS, future edition 2 of IEC 60721-2-4, 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 IEC 60721-2-4:2018.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-04-27

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2021-07-27

document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 60721-2-4:2018 was approved by CENELEC as a

European Standard without any modification.
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SIST EN IEC 60721-2-4:2018
IEC 60721-2-4
Edition 2.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Classification of environmental conditions –
Part 2-4: Environmental conditions appearing in nature – Solar radiation and
temperature
Classification des conditions d’environnement –
Partie 2-4: Conditions d'environnement présentes dans la nature – Rayonnement
solaire et température
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-5781-4

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 IEC 60721-2-4:2018
– 2 – IEC 60721-2-4:2018 © IEC 2018
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 5

4 General ........................................................................................................................... 5

5 Solar radiation physics .................................................................................................... 6

6 Levels of global radiation ................................................................................................. 7

6.1 Maximum levels ...................................................................................................... 7

6.2 Mean monthly and annual global solar radiation ...................................................... 7

6.3 Simultaneous values of maximum air temperatures and solar radiation ................... 8

6.4 World distribution of daily global irradiation ............................................................. 8

7 Minimum levels of atmospheric radiation at night ............................................................. 8

Annex A (informative) World distribution of daily global irradiation ....................................... 10

Bibliography .......................................................................................................................... 15

Figure 1 – Spectra of electromagnetic radiation from the Sun and the surface

of the Earth ............................................................................................................................. 9

Figure A.1 – Mean relative global irradiation for the month of June (in %) ............................. 12

Figure A.2 – Mean relative global irradiation for the month of December (in %) ..................... 13

Figure A.3 – Mean relative global irradiation for the year (in %) ............................................ 14

Table 1 – Typical peak values of global irradiance (in W/m from a cloudless sky) ................. 7

Table A.1 – Mean daily extra-terrestrial global irradiation (kWh/m ) ...................................... 11

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SIST EN IEC 60721-2-4:2018
IEC 60721-2-4:2018 © IEC 2018 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CLASSIFICATION OF ENVIRONMENTAL CONDITIONS –
Part 2-4: Environmental conditions appearing in nature –
Solar radiation and temperature
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 60721-2-4 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 1987 and
Amendment 1:1988. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) Figures updated including the addition of global irradiation information,
b) Format updated.
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SIST EN IEC 60721-2-4:2018
– 4 – IEC 60721-2-4:2018 © IEC 2018
The text of this International Standard is based on the following documents:
FDIS Report on voting
104/800/FDIS 104/803/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 60721 series, published under the general title Classification of

environmental conditions, can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 60721-2-4:2018
IEC 60721-2-4:2018 © IEC 2018 – 5 –
CLASSIFICATION OF ENVIRONMENTAL CONDITIONS –
Part 2-4: Environmental conditions appearing in nature –
Solar radiation and temperature
1 Scope

This part of IEC 60721 presents a broad division into types of solar radiation areas. It is

intended to be used as part of the background material when selecting appropriate severities

of solar radiation for product applications.

All types of geographical areas are covered, except areas with altitudes above 5 000 m.

This document also serves to define limiting severities of solar radiation to which products are

liable to be exposed during transportation, storage and use.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://
...

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