1、BRITISH STANDARD BS EN 60721-3-1:1997 IEC 60721-3-1: 1997 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 1: Storage The European Standard EN60721-3-1:1997has the status of a British Standard ICS 19.040BSEN 60721-3-
2、1:1997 This British Standard, having been prepared under the directionof the ElectrotechnicalSector Board,was published undertheauthority of the Standards Board and comesintoeffect on 15August1997 BSI 12-1999 ISBN 0 580 27809 3 National foreword This British Standard is the English language version
3、of EN60721-3-1:1997. It is identical with IEC60721-3-1:1997. It supersedes BS EN60721-3-1:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/50, Environmental testing of electrotechnical products, which has the responsibility to: aid enquirers t
4、o understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represen
5、ted on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The BritishStanda
6、rds which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to inclu
7、de all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi
8、 andii, theEN title page, pages2 to16 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN60721-3-1:1997
9、BSI 12-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60721-3-1 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60721-3-1 March 1997 ICS 19.040 Supersedes EN60721-3-1:1993and its amendment Descriptors: Environmental conditions, environmental parameters,
10、 storage English version Classification of environmental conditions Part3:Classification of groups of environmental parameters and their severities Section1: Storage (IEC60721-3-1:1997) Classification des conditions denvironnement Partie3: Classification des groupements des agents denvironnement et
11、de leurs svrits Section1: Stockage (CEI60721-3-1:1997) Klassifizierung von Umweltbedingungen Teil3: Klassen von Umwelteinflugren und deren Grenzwerte Hauptabschnitt1: Langzeitlagerung (IEC60721-3-1:1997) This European Standard was approved by CENELEC on1996-12-09. CENELEC members are bound to comply
12、 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 Central Secre
13、tariat 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 Central Secretariat has the same status as t
14、he official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrot
15、echnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN60
16、721-3-1:1997EEN60721-3-1:1997 BSI 12-1999 2 Foreword The text of document75/277/FDIS, future amendment to IEC60721-3-1, prepared by IECTC75, Classification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A3to EN60721-3-1:1993 on199
17、6-12-09. The text of this document, together with that of IEC60721-3-1:1987and its amendments1:1991 and2:1993, was published by IEC as the second edition of IEC60721-3-1in February1997. According to a decision of principle taken by the Technical Board of CENELEC, the approval of EN60721-3-1:1993/A3h
18、as been converted into the approval of a new EN60721-3-1. This European Standard supersedes EN60721-3-1:1993and its amendment A2:1994. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only.
19、 In this standard, Annex ZA is normative and Annex A, Annex B and Annex C are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC60721-3-1:1997was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2
20、1 Scope and object 3 2 Normative references 3 3 Definitions 3 4 General 4 5 Classification of groups of environmental parameters and their severities 4 6 Sets of environmental condition class combinations 5 Annex A (informative) Summary of conditionscovered by the classes 11 Annex B (informative) Su
21、mmary of conditionscovered by the sets of class combinations 13 Annex C (informative) Explanation of the environmental conditions in tropical areas asspecified in classes 1K10 and 1K11 13 Annex ZA (normative) Normative references tointernational publications with their corresponding European publica
22、tions 16 Figure 1 Model shock response spectra 10 Figure C.1 Climatograms for tropical damp typeof climate and tropical dry type of climate 15 Table 1 Classification of climatic conditions 6 Table 2 Classification of special climatic conditions 7 Table 3 Classification of biological conditions 7 Tab
23、le 4 Classification of chemically active substances 8 Table 5 Classification of mechanically active substances 9 Table 6 Classification of mechanical conditions 9 Table 7 Sets of environmental class combinations 9 latest date by which the EN has to be implemented at national level by publication of
24、an identical national standard or by endorsement (dop) 1997-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1997-12-01EN60721-3-1:1997 BSI 12-1999 3 1 Scope and object This section of IEC60721-3classifies the groups of environmental parameters and
25、 their severities to which products, together with their packaging if any, are subjected when stored. The environmental conditions specified in this standard are limited to those which may directly affect the products or their ultimate performance. Only environmental conditions as such are considere
26、d. No special description of the effects of these conditions on the products is given. Transfer during storage is not included in the classification. Environmental conditions directly related to fire or explosion and conditions related to ionizing radiation are excluded. Any other unforeseen inciden
27、ts are also excluded. The possibility of their occurrence should be taken into account in special cases. Offshore locations are not included. Conditions of stationary use, portable and non-stationary use, use in vehicles and ships, and conditions of transportation are given in other sections of IEC6
28、0721-3. The object of this standard is to classify environmental parameters and their severities to which a product may be exposed during storage. A limited number of classes of environmental conditions is given, covering a broad field of application. The user of this standard should select the lowe
29、st classification necessary for covering the conditions of intended storage. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC60721-3. At the time of publication, the editions indicated were
30、 valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC60721-3are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently
31、valid International Standards. IEC 721-1:1990, Classification of environmental conditions Part1: Environmental parameters and their severities. Amendment 1 (1992) IEC 721-2-1:1982, Classification of environmental conditions Part2: Environmental conditions appearing in nature Temperature and humidity
32、. Amendment 1 (1987) IEC 721-3-0:1984, Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Introduction. Amendment 1 (1987) IEC 60721-3-2:1997, Classification of environmental conditions Part3: Classification of environmental pa
33、rameters and their severities Section 2: Transportation. IEC 721-3-3:1994, Classification of environmental conditions Part3: Classification of environmental parameters and their severities Section 3: Stationary use at weatherprotected locations. IEC 721-3-4:1995, Classification of environmental cond
34、itions Part3: Classification of environmental parameters and their severities Section 4: Stationary use at non-weatherprotected locations. 3 Definitions For the purposes of this section of IEC721-3, the following definitions apply, in addition to the definitions in clause 3 of IEC721-1: 3.1 storage
35、the product is placed at a certain site for long periods, but not intended for use during these periods 3.2 weatherprotected location a location at which the product is protected from weather influences: totally weatherprotected location: direct weather influences are totally excluded: (enclosed loc
36、ation) partially weatherprotected location: direct weather influences are not completely excluded (sheltered location) 3.3 non-weatherprotected location a location at which the product is not protected from direct weather influencesEN60721-3-1:1997 4 BSI 12-1999 4 General For further general guidanc
37、e, see IEC721-3-0. The severities specified are those which will have a low probability of being exceeded. All specified values are maximum or limit values. These values may be reached, but do not occur permanently. Depending on the local situation, there may be different frequencies of occurrence r
38、elated to a certain period of time. Such frequencies of occurrence have not been included in this standard, but should be considered for any environmental parameter. They should additionally be specified, if applicable. Information on the duration and frequency of occurrence is given, as clause 6, i
39、n amendment1to IEC721-3-0. Attention is drawn to the fact that combinations of the environmental parameters given may increase the effect on a product. This applies especially to the presence of high relative humidity in addition to biological conditions, or to the presence of chemically or mechanic
40、ally active substances. It is recognized that extreme or special environmental conditions may exist. Specifications for products to be stored under such special conditions are a matter of negotiation between supplier and user. 5 Classification of groups of environmental parameters and their severiti
41、es A number of classes for climatic conditions (K), special climatic conditions (Z), biological conditions (B), chemically active substances (C), mechanically active substances (S), and mechanical conditions (M) are specified in Table 1 to Table 6. This classification allows a number of possible com
42、binations of environmental conditions which bear upon products wherever stored. It represents the real situation concerning world-wide conditions of storage, due to local influences of open-air climate, etc. For certain environmental parameters, it has not yet been possible to specify quantitative s
43、everities. For a given location or product, reference should be made to the total set of classes, for example: 1K2/1Z1/1B1/1C2/1S1/1M3 See also clause 6. Annex A contains a summary of the conditions covered by each class. 5.1 Climatic conditions The climatic conditions specified for classes1K1to1K11
44、 refer to the conditions of storage of products. They have been experienced world-wide over a long period of time, taking into account all the parameters that can influence them, such as external (open-air) climatic conditions, type of building construction, temperature/humidity controlling systems,
45、 and internal conditions, for example heat dissipation from other equipment, presence of humans, etc. The conditions should cover all normal cases, but not exceptional events. Climatic conditions in tropical areas, as specified in classes1K10and1K11, are explained in Annex C. When selecting appropri
46、ate classes, attention should be paid to the fact that the climatic conditions inside buildings depend on the outside (open-air) conditions, especially air temperature and solar radiation, and the type of building construction. Walls with good thermal insulation or high thermal capacity can consiste
47、ntly smooth the peaks of outside air temperature variations between day and night, or, exceptionally, those produced over a longer period of time. Walls with poor thermal insulation or low thermal capacity cannot have this effect, and peaks can be magnified due to the effect of solar radiation durin
48、g the day, and to the effect of building radiation at night. The effect of solar radiation can be increased by either heat-trap or greenhouse effects. At non-weatherprotected locations, the influence from special climatic conditions constitutes a more significant share of the effects bearing upon a
49、product and its functional parts than at weatherprotected locations. The effects of temperature change, solar radiation, precipitation, air velocity and wind-chill should be particularly considered in this respect. The severity of these effects may be influenced, for example by constructional details (type and thickness of material, colour of surfaces, sealing or breathing of casings, etc.), and by storage details (selection of storage site, consideration of degrees of exposure to prevailing wind and weather, e
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