1、BRITISH STANDARD BS EN 60721-3-2:1997 IEC 60721-3-2: 1997 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 2: Transportation The European Standard EN 60721-3-2:1997 has the status of a British Standard ICS 19.040BSEN
2、60721-3-2:1997 This British Standard, having been prepared under the directionof the ElectrotechnicalSector Board, was published underthe authorityof the Standards Boardand comes into effect on 15 August 1997 BSI 10-1999 ISBN 0 580 27810 7 National foreword This British Standard is the English langu
3、age version of EN60721-3-2:1997. It is identical with IEC60721-3-2:1997. It supersedes BSEN60721-3-2:1993 which is withdrawn.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
4、enquirers to 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 organizatio
5、ns represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to the
6、other, publications may contain identifiers from both systems. 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 British Standards
7、 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 include
8、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, pages i a
9、nd ii, the EN title page, pages2 to20, an inside back cover 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 Comme
10、ntsBSEN60721-3-2:1997 BSI 10-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60721-3-2 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60721-3-2 March 1997 ICS 19.040 Supersedes EN 60721-3-2:1993 and its amendment Descriptors: Electronic components, elec
11、trical equipment, electronical equipment, electrotechnical components, climatic conditions, environment, choice, transportation Englishversion Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 2: Transportation (IEC60
12、721-3-2:1997) Classification des conditions denvironnement Partie3: Classification des groupements des agents denvironnement et de leurs svrits Section2: Transport (CEI60721-3.2:1997) Klassifizierung von Umweltbedingungen Teil3: Klassen von Umwelteinflugren und deren Grenzwerte Hauptabschnitt2: Tran
13、sport (IEC60721-3-2:1997) This European Standard was approved by CENELEC on1996-12-09. 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 l
14、ists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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
15、 responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxemb
16、ourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussel
17、s 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60721-3-2:1997 EEN60721-3-2:1997 BSI 10-1999 2 Foreword The text of document 75/278/FDIS, future edition2 of IEC60721-3-2, prepared by IECTC75, Classification of environmental c
18、onditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN60721-3-2 on1996-12-09. This European Standard supersedes EN60721-3-2:1993 and its amendmentA2:1994. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes
19、 designated “informative” are given for information only. 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 IEC60721-3-2:1997 was approved by CENELEC as a European St
20、andard without any modification. Contents Page Foreword 2 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 4 Annex A (informative) Survey of con
21、ditions affecting the choice of environmental parameters and their severities 9 Annex B (informative) Summary of conditions covered by the sets of class combinations 18 Annex C (informative) Explanation of the environmental conditions in tropical areas as specified in classes 2K6 and 2K7 19 Annex ZA
22、 (normative) Normative references to international publications with their corresponding European publications Inside back cover Figure 1 Model shock response spectra (first order maximax shock response spectra) 8 Figure C.1 Climatograms for tropical damp type of climate and tropical dry type of cli
23、mate 20 Table 1 Classification of climatic conditions 5 Table 2 Classification of biological conditions 5 Table 3 Classification of chemically active substances 6 Table 4 Classification of mechanically active substances 6 Table 5 Classification of mechanical conditions 7 Table 6 Sets of environmenta
24、l class combinations 7 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-12-01 latest date by which the national standards conflicting with the ENhave to be withdrawn (dow) 1997-12-01EN60721-3-2:1997 BSI 1
25、0-1999 3 1 Scope and object This section of IEC60721-3 classifies the groups of environmental parameters and their severities to which a product is subjected while being transported from one place to another after being made ready for dispatch from the manufacturing factory. The most commonly used m
26、ethods of transportation have been taken into account, including the following: road transport: cars, lorries, trucks, animals, conveyors; rail transport: trains, trams, conveyors; water transport, inland and maritime: ships, hovercraft, conveyors; air transport: aircraft, conveyors; vertical transp
27、ort: cranes, transport lifts, cableways. The environmental conditions specified in this section are those met by the product being transported. If the product is packed, the environmental conditions apply to the package containing the product. Only severe conditions, which may be harmful to products
28、, are included. Conditions for storage and use are given in other sections of IEC721-3. The object of this standard is to classify groups of environmental parameters and their severities to which a product will be exposed when being transported on ground, water and in air, including loading and unlo
29、ading. A limited number of classes of environmental conditions are given, covering a broad field of application. The user of this standard should select the lowest classes necessary covering each of the conditions of the intended transportation. Some guidance for this is given inAnnex A. 2 Normative
30、 references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC721-3. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based o
31、n this section of IEC721-3 are 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 valid International Standards. IEC 721-1:1990, Classification of environmental conditions P
32、art 1: Environmental parameters and their severities. Amendment 1 (1992) Amendment 2 (1995) IEC 721-2-1:1982, Classification of environmental conditions Part 2: Environmental conditions appearing in nature Temperature and humidity. Amendment 1 (1987) IEC 721-3-0:1984, Classification of environmental
33、 conditions Part 3: Classification of groups of environmental parameters and their severities Introduction. Amendment 1 (1987) 3 Definitions For the purpose of the present section of IEC721-3, the following definitions apply, in addition to the definitions in clause3 of IEC721-1. 3.1 weatherprotecte
34、d the product, packed or unpacked, is contained within an enclosure which affords some protection from the environment, ranging from a temperature controlled container to a waterproof cover placed over the product. Ventilation ranges from controlled air flow to the raising of part of a waterproof co
35、ver to allow for natural air flowEN60721-3-2:1997 4 BSI 10-1999 3.2 non-weatherprotected the product, packed or unpacked, is not protected in any way from the environment 4 General Reference to IEC721-3-0 is strongly recommended in order to avoid misuse of the classes defined in other sections of IE
36、C721-3. 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 situation, there may be different frequencies of occurrence related to a certa
37、in period of time. Such frequencies of occurrence have not yet 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 clause6, in amendment1 t
38、o 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 conditions of chemically or mechanically active sub
39、stances. 5 Classification of groups of environmental parameters and their severities A limited number of classes for climatic conditions (K), biological conditions (B), chemically active substances (C), mechanically active substances (S) and mechanical conditions (M) are given inTable 1, Table 2, Ta
40、ble 3, Table 4 and Table 5. For a given product, reference should be made to the total set of classes, for example2K2/2B1/2C2/2S2/2M3. See also clause6. The basis of these classes is explained in clauseA.2 ofAnnex A. Climatic conditions in tropical areas as specified in classes2K6 and2K7 are explain
41、ed inAnnex C. The combination of the lowest classes2K1/2B1/2C1/2S1/2M1 forms the conditions to which a product will be subjected when being transported under very restricted conditions. The combination of the highest classes2K5/2B3/2C3/2S3/2M3 covers transportation under a very wide variety of condi
42、tions including very severe conditions. A class with higher digit conditions normally includes all classes with lower digits. For certain parameters it has not yet been possible to give quantitative values of severities. A summary of the conditions covered by the classes is given in clauseA.3 ofAnne
43、x A. 6 Sets of environmental condition class combinations As indicated in clause5, the classification allows a number of possible combinations of environmental conditions bearing on products wherever used. The number of possibilities, and thus the flexibility, is therefore very great. In practice, h
44、owever, this flexibility is not always an advantage when, for instance, environmental condition specifications for a certain location are drawn up by different parties, invariably producing small but disturbing divergencies. In order to limit the possibilities to general cases, standard sets of clas
45、s combinations may be selected fromTable 6. For a given location or product, reference may then be made to this standard, for example IE22. Only when conditions are not considered to be covered by this specification, is reference made to each class as indicated in clause5. Alternatively, if some sev
46、erities of parameters deviate, from that or those of the class combination, this should be expressed by the addition to the set designation of the following phrase: “but.(parameter).(severity and unit)”, for example IE22 but sand10g/m 3 . Annex B gives a summary of conditions covered by the sets of
47、class combinations.EN60721-3-2:1997 BSI 10-1999 5 Table 1 Classification of climatic conditions Table 2 Classification of biological conditions Environmental parameter Unit Class 2K1 2K2 2K3 2K4 2K5 2K5H 2K5L 2K6 f 2K7 f a) Low air temperature C + 5 25 25 40 65 25 65 + 5 20 b) High air temperature,
48、air in unventilated enclosures a C No + 60 + 70 + 70 + 85 + 85 + 70 + 70 + 85 c) High air temperature, air in ventilated enclosures or outdoor air b C + 40 + 40 + 40 + 40 + 55 + 55 + 40 + 40 + 55 d) Change of temperature, air/air c C No 25/+ 25 25/+ 30 40/+ 30 65/+ 30 25/+ 30 65/+ 30 + 5/+ 30 20/+ 3
49、0 e) Change of temperature, air/water c C No No + 40/+ 5 + 40/+ 5 + 55/+ 5 + 55/+ 5 + 40/+ 5 + 40/+ 5 + 55/+ 5 f) Relative humidity, not combined with rapid temperature changes % 75 75 95 95 95 95 95 95 95 C + 30 + 30 + 40 + 45 + 50 + 50 + 45 + 45 + 50 g) Relative humidity, combined with rapid temperature changes: air/air at high relative humidity c % No No 95 95 95 95 95 95 95 C 25/+ 30 40/+ 30 65/+ 30 25/+ 30 65/+ 30 + 5/+ 30 20/+ 30 h) Absolute humidity,
