1、 IEC 60721-2-1 Edition 2.0 2013-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Classification of environmental conditions Part 2-1: Environmental conditions appearing in nature Temperature and humidity Classification des conditions denvironnement Partie 2-1: Conditions denvironnement prsentes dans l
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16、.ch. IEC 60721-2-1 Edition 2.0 2013-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Classification of environmental conditions Part 2-1: Environmental conditions appearing in nature Temperature and humidity Classification des conditions denvironnement Partie 2-1: Conditions denvironnement prsentes da
17、ns la nature Temprature et humidit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE L ICS 19.040 PRICE CODE CODE PRIX ISBN 978-2-83220-899-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Intern
18、ationale 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 agr. colourinside 2 60721-2-1 IEC:2013 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Normative references
19、. 6 3 Terms and definitions, abbreviations, quantities and units 6 4 General information regarding data collection and analysis 6 5 General validation process . 7 6 Open air climates . 8 6.1 General . 8 6.2 Environmental parameters . 8 6.3 Identification of statistical open-air climates 8 6.4 Map of
20、 open-air climates . 9 Annex A (informative) Map of climate classification 10 Bibliography 11 Figure A.1 Climate classifications 10 Table 1 Climate classifications . 7 Table 2 Climate classification definitions 7 Table 3 Classification of climates by extreme daily mean values 8 Table 4 Classificatio
21、n of climates by annual extreme values 8 Table 5 Classification of climates by absolute extreme value . 9 60721-2-1 IEC:2013 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ CLASSIFICATION OF ENVIRONMENTAL CONDITIONS Part 2-1: Environmental conditions appearing in nature Temperature and humidity FOREWO
22、RD 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 elect
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30、s 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,
31、 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 th
32、at 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 60721-2-1 has been prepared by IEC technical committee 104: Environmental conditions, classification and me
33、thods of test. This second edition cancels and replaces the first edition published in 1982 and its amendment 1 (1987), and constitutes a technical revision. The main changes with respect to the previous edition are in the definitions of climate types. 4 60721-2-1 IEC:2013 The text of this standard
34、is based on the following documents: FDIS Report on voting 104/610/FDIS 104/617/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
35、 A list of all the parts in the IEC 60068 series, under the general title Classification of environmental conditions, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “h
36、ttp:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are consider
37、ed to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 60721-2-1 IEC:2013 5 INTRODUCTION Electrotechnical products are used in almost all areas of the world under varying climatic conditions and have to meet the stresses impo
38、sed by these climatic conditions with the necessary reliability. A detailed knowledge of the climatic conditions to which the product will be subjected is necessary in the design stage to ensure that reliability is met. Data on open-air temperature and humidity have been collected and statistically
39、processed for many years throughout the world. Such data is represented in this part of IEC 60721. In addition to open-air temperature, temperature stresses on a product depend on a number of other environmental parameters, for example solar radiation, air velocity or heating from adjacent equipment
40、. The effects of humidity depend on temperature, temperature changes and impurities in the humid air. In many cases the extremes of temperature and humidity are of great importance even if they occur for a short time. In other cases, where large time constants for heat or water penetration are invol
41、ved, the mean values of temperature and humidity over a certain period may be more important. It has therefore been considered useful to present here both the mean value over many years of the annual extreme values of temperature and humidity, which will occur only for short periods (a few hours), a
42、nd the mean value over many years of the extreme daily mean values of temperature and humidity, which will occur for longer periods. In order to cover cases where rare events need to be taken into account, the absolute extreme temperatures and humidity levels, observed over a period of many years, h
43、ave also been presented. 6 60721-2-1 IEC:2013 CLASSIFICATION OF ENVIRONMENTAL CONDITIONS Part 2-1: Environmental conditions appearing in nature Temperature and humidity 1 Scope This part of IEC 60721 presents classifications of open-air climates in terms of temperature and humidity. It is intended t
44、o be used as part of the background material when selecting appropriate temperature and humidity severities for product testing and application. The climates cover all areas of the world, excluding the central Antarctic and high altitudes (above 5 000 m). This presentation may be used as background
45、material when issuing climatic environmental classes for product applications. This standard defines a limited number of open-air climate classifications, in terms of temperature and humidity, which represent the conditions most frequently met by products while being transported, stored, installed a
46、nd used. 2 Normative references 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
47、any amendments) applies. IEC 60721-1:1990, Classification of environmental conditions Part 1: Environmental parameters and their severities IEC/TR 62130, Climatic field data including validation MIL210 Extreme and Percentile Environmental Reference Tables (ExPERT) database (Version 1.0 July 1997) PE
48、ARCE, E.A., and SMITH, C.G., The Hutchinson World Weather Guide by Helicon Publishing Ltd (ISBN 1-85986-342-6, 2000) KOTTEK, M., GRIESER, J., BECK, C., RUDOLF, B. and RUBEL, F., World Map of the Kppen-Geiger climate classification updated: 2006, Meteorol. Z., 15, 259-263 3 Terms and definitions, abb
49、reviations, quantities and units Terms and definitions are defined, in context, throughout the present standard. 4 General information regarding data collection and analysis Climatic data was collected and validated in IEC/TR 62130. The two principle data sources were the MIL210 ExPERT and The Hutchinson World Weather Guide. 60721-2-1 IEC:2013 7 The MIL210 ExPERT database contained daily temperature and humidity
