1、BRITISH STANDARD Classification of environmental conditions Part 3. Classrfication 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 19.040 BS EN 60721-3-2 : 1997 IEC 60721-3-2 t 199
2、7 NO COPING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesSTDmBSI BS EN b07211-3-2-ENGL 11997 11bZqbbS Ob311839 229 AmdNo. BS EN 607213-2 : 1997 Date Text affected National forewor
3、d This British Standard is the English language version of EN 60721-3-2 : 1997. It is identicai with IEC 60721-3-2 : 1997. It supemeda BS EN 60721-3-2 : 1993 which is withdrawn. The UK participation in its preparation was entrusted to Technicai Committee GEY50, Environmental testing of electrotechni
4、d products, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internatio - monitor reW intedonai and European developments and promulgate them in the IJK. This British Standard, hawig been prepared under the direction of the Eiectrotechnicai Sector
5、 Board, was published under the authority of the Standards Board and comes into effect on 16 August 1997 (o BSI 1997 ISBN O 0 27810 7 A list of organizations represented on this committee can be obtained on request to its secretary. Fbm 1 January 1997, all IEC publications have the number 60000 adde
6、d to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers fkom both systms. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards no
7、rmally inciude an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these internationai or European publications may be found in the BSI Standards Cablogue under the section entitled Internationa
8、l Standards Correspondence Index, or using the Find facility of the BSI Standards Electronic Catalogue. Compiance 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, the EN title page, pages
9、 2 to 25, a biank page, an inside back cover and a back cover. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesSTD-BSI BS EN b0721-3-2-ENGL 1977 lb24bb7 Ob3LB40 T4O EUROPEAN STANDARD NORME EUROPEENNE EUROPAISCHE NORM EN 60721-3-2 March 1997 I
10、Cs 19.040 Supusdw EN 60721 -3-2: 1993 nd its amendnwnt DNcriptors: Electronic components. eloctrical wimnt. ehctronical equiprn.m, ekcbomhniccil compowm, clknrric conditions, environment, choke, wansporutiari English version Classification of environmental condftlons Part 3: Classification of groups
11、 of environmental parameters and their sevedties Section 2: Transportation (IEC 60721-3-2:1997) Classification des conditions denvironnement Teil 3: Klassen von - Partie 3: Classification des groupements Umwelteinflugr8en und deren des agents denvironnement et de leurs sverits Hauptabschnitt 2: Tran
12、sport Klassifizierung von Umweltbedingungen Grenzwerte II = = Ii E Section 2: Transport (IEC 60721 -3-2: 1997) (CE1 60721 -3-2: 1997) * * Co This European Standud wu approved bv CENELEC on 1996-1 2-09. CEWELEC members are bound to compiy with the CENICENELEC Internal Rsgulrtiw which stipulate the co
13、nditions for giving this European Standaid the status of a national stanar without any alteration. Uptodate lista and bibllographical references conchng such nationd standards may be obtained on application to tha Centrd Secretariat 01 to any CENELEC mk. Thir Euop.wi Standud exists in three offidal
14、venions (Englirh, French, German). A version in any other languig. mada by trnrktion under the msponsiity of a CENELEC member into its own language and notffhd to the Centrai Secretariat ham the same status u the oMcid versions. CENELEC mmben are the national electrotechnicai committees of Austria,
15、Belgium, Denmark, Finand, France, Gmany, Greece, Icdan, Ireland, Italy, Luxembourg, NettMands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit EuropBen de Normalisstion Electrotechnique Europaisches Komitee fr Ele
16、ktrotechnische Normung o 1997 CENELEC - All right8 of exploitation in any form and by any mans roserued worldwide for CENELEC memkts. Ref. No. EN 60721-3-2:1997 E COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesSTDmBSI BS EN b0721-3-2-ENGL 17
17、77 1b24bb7 Ob31841 787 Page 2 EN 60721-3-2 : 1997 Foreword The text of document 75/2781FDIS, future edition 2 of IEC 60721-3-2, prepared by IEC TC 75, Classification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60721 -3-2 on 1996-1 2-0
18、9. This European Standard supersedes EN 6072 1 -3-2: 1 993 and its amendment A2: 1 994. The following dates were fixed: - latest date by which the EN has to be implemented at national feve! by p - rail.transport: trains, trams, conveyors; - water transport, inland and maritime: ships, hovercraft, co
19、nveyors; - air transport: aircraft, conveyors; - vertical transport: cranes, transport lifts, cableways. The environmental conditions specified in this section are those met by the product being tramptad. Ef: Ihe ptuduci is packed, ihe environmental conditions apply to the packege c%teinis?.g ih pro
20、duct. Only seveia uunditiofis, which may be harmful to products, are included. Conditions for storage and use are given in other sections of IEC 721 -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 tr
21、ansported on ground, water and in air, including loading and unloading. 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 trans
22、portation. Some guidance for this is given in annex A. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 721-3. At the time of publication, the editions indicated were valid. All normative d
23、ocuments are subject to revision, and parties to agreements based on this section of IEC 721-3 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Sta
24、ndards. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesSTDmBSI BS EN bU721-3-2-ENGL 1997 B Lb24bb9 Ob31844 b9b Page 6 EN 60721-3-2 : 1997 IEC 721 -1 : 1990, Classification of environmental conditions - Part 1: Environmental parameters and th
25、eir severities Amendment 1 (1992) Amendment 2 (1 995) IEC 721 -2-1 : 1982, Ciassification of environmental conditions - Part 2: Environmental conditions appearing in nature - Temperature and humidity Amendment 1 (1987) IEC 721 -3-0: 1984, Classification of environmental conditions - Part 3: Classifi
26、cation of groups of environmental parameters and their severities - Introduction Amendment 1 (1 987) 3 Definitions For the purpose of the present section of IEC 721-3, the following definitions apply, in addition to the definitions in clause 3 of IEC 721 -1. 3.1 wratherprotected: The product, packed
27、 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 cover to allow for natu
28、ral air flow. - II E from the environment. II 4 General 3.2 non-weatherprotectad: The product, packed or unpacked, is not protected in any way - _. - * * KI3 Reference to IEC 721-3-0 is strongly recommended in order to avoid misuse of the ciasses defined in other sections of IEC 721-3. The severitie
29、s 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 certain period of time. Su
30、ch 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. I Information on the duration and frequency of occurrence is given, as clause 6, in amendment 1 to IEC 721-3-0. At
31、tention 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 substances. 5 Class
32、ification 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 in tables 1, 2, 3, 4 and 5. For a give
33、n product, reference should be made to the total set of classes, for example 2K2/281/2C2/2S2/2M3. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling Services STDmBSI BS ENb0721-3-2-ENGL 1777 lb24bb7 Ob31845 522 Page 6 EN 60721-3-2 : 1997 See also clause
34、 6. The basis of these classes is explained in clause A.2 of annex A. Climatic conditions in tropical areas as specified in classes 2K6 and 2K7 are explained in annex C. The combination of the lowest classes 2K1/261/2Cl/2S1/2Ml forms the conditions to which a product will be subjected when being tra
35、nsported under very restricted conditions. The combination of the highest classes 2K5/2B3/2C3/2S3/2M3 covers transportation under a very wide variety of conditions including very severe conditions. A class with higher digit conditions normally includes all classes with lower digits. For certain para
36、meters it has not yet been possible to give quantitative values of severities. A summary of the conditions covered by the classes is given in clause A.3 of annex A. 6 Sets of environmental condition class combinations As indicated in clause 5, the classification allows a number of possible combinati
37、ons of environmental conditions bearing on products wherever used. The number of possibilities, and thus the flexibility, is therefore very great. In practice, however, this flexibility is not always an advantage when, for instance, environmental condition specifications for a certain location are d
38、rawn up by different parties, invariably producing small but disturbing divergencies. !: ts !:a: :M pzssibKiss io geni37al cases, standard sets of class combinations may be selected from table 6. For a given location or product, reference may then be made to this standard, for example IE22. Only whe
39、n conditions are not considered to be covered by this specification, is reference made to each class as indicated in clause 5. Alternatively, if some severities of parameters deviate from that or those of the class combination, this should be expressed by the addition to the set designation of the f
40、ollowing phrase: but . (parameter) . (severity and unit)“, for example IE22 but sand 10 gim3. Annex 6 gives a summary of conditions covered by the sets of class combinations. COPYRIGHT European Committee for Electrotechnical StandardizationLicensed by Information Handling ServicesSTD-BSI BS EN b0721
41、-3-2-ENGL 1997 m lb2Libb7 Ob3L4b 4b7 M Page 7 EN 60721-3-2 : 1997 Environmental parameter a) Low air temperature b) High air temperature, air in unventilated Table 1 - Classification of climatic conditions Unit Class 2K1 2K2 2K3 2K4 2K5 2K5H 2K5L 2K66) 2K76) C +5 -25 -25 -40 -65 -25 -65 +5 -20 C NO
42、+60 +?O +70 +85 +5 +70 +70 +5 c) High air temperature, air in ventilated enclosures or outdoor ai?) enclosures ) I I I I 1 I I I I I I C +40 40 +40 +40 +55 +55 +40 40 +55 temperature, air/aifl) e) Change of temperature. arhvated f) Relative humidity. not wmbined wlth rapid temperature changes g) Rel
43、ative humidity, combined with rapid C NO NO +4W+5 +40/+5 +W+S W+5 +40/+5 W+5 +55/+5 % 75 75 95 95 95 95 95 95 95 OC +30 +30 +40 +45 +50 +50 +45 +45 +50 % No No 95 95 95 95 95 95 95 humid) I l I I I I I I 1 I I h) Absdute humidity, wmbined with rapid temperature changes: airiair at high water content
44、 4 g/ms No No 60 60 80 80 60 60 80 OC +70/+15 +70/+15 W+15 +85/+15 +7W+15 +70/+15 W+15 i) Low air pressure I kPa 1 70 I 70 I 70 I 70 1 30 I 30 I 30 I 30 I 30 j) Change of air pressure k) Movement of surrounding medium, air I) Precipitation. rain m) Radiation, sdar n) RadittiOn, heat other than raid)
45、 o) Water from sources kPaimin No No No No 6 6 6 6 6 mis No No 20 20 30 30 30 30 30 mmmin No No 6 6 15 15 6 15 15 W/m2 700 700 1120 1120 1120 1120 1120 1120 1120 W/m2 NO No 600 600 600 600 600 600 600 mis No No 1 1 3 3 3 3 3 p) Wetness I None I No I No I Conditions of wet surfaces 1 1) The high temp
46、erature of the surface of a product may be influenced by both the surrounding air temperature given here and the solar radiation through a window or other opening. 2) The high temperature of the surface of a product is influenced by the surrounding air temperature given here and the solar radiation
47、defined below. 3) A direct transfer of the product between the two temperatures given is presumed. 4) The product is assumed to be subjected to a rapid decrease of temperature only (no rapid increase). The figures of water content apply to temperatures down to the dew-point; at lower temperatures th
48、e relative humidity is assumed to be approximately 1 O0 %. 5) The figure indicates the velocity of water and not the height of water accumulated. 6) Further information on classes 2K6 (tropical damp) and 2K7 (tropical dry) is given in annex C. COPYRIGHT European Committee for Electrotechnical Standa
49、rdizationLicensed by Information Handling ServicesTable 2 - Classification of biological conditions Environmental parameter a) Flora b) Fauna Unit Class 281 282 283 None No Presence of mould, fungus, etc. None No Presence of rodents or other animals harmful to I products: excluding termites including termites Table 3 - Classificatim of chemically active eubatances a) Sea salts b) Sulphur dioxide Class I t 2c 1 I 2c2 I 2C3 Environmental parameter None No Conditions of salt mist Conditions of salt water mg/m3 O, 1 1,O (03) 10 (5s) c)
