1、BRITISH STANDARD BS EN 60721-3-5:1997 IEC 60721-3-5: 1997 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 5: Ground vehicle installations The European Standard EN 60721-3-5:1997 has the status of a British Standard
2、ICS 19.040BSEN 60721-3-5:1997 This British Standard, having been prepared under the directionof the ElectrotechnicalSector Board, was published under the authorityof the Standards Boardand comes into effect on 15August1997 BSI 11-1999 ISBN 0 580 27814 X National foreword This British Standard is the
3、 English language version of EN60721-3-5:1997. It is identical with IEC60721-3-5:1997. It supersedes BSEN60721-3-5:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/50, Environmental testing of electrotechnical products, which has the responsib
4、ility to: aid 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
5、of organizations represented 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 public
6、ations. The BritishStandards 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
7、does not purport to include 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 i
8、nside front cover, pages i and ii, theEN title page, pages 2 to 26 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. Dat
9、e CommentsBSEN 60721-3-5:1997 BSI 11-1999 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60721-3-5 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60721-3-5 April 1997 ICS 19.040 Supersedes EN 60721-3-5:1993 and its amendment Descriptors: Electronic componen
10、ts, electrical equipment, electronical equipment, electrotechnical components, climatic conditions, environment, choice, ground vehicles English version Classification of environmental conditions Part3:Classification of groups of environmental parameters and their severities Section 5: Ground vehicl
11、e installations (IEC 60721-3-5:1997) Classification des conditions denvironnement Partie 3: Classification des groupements des agents denvironnement et de leurs svrits Section 5: Installations des vhicules terrestres (CEI 60721-3-5:1997) Klassifizierung von Umweltbedingungen Teil3:Klassen von Umwelt
12、einflugren und deren Grenzwerte Hauptabschnitt5:Einsatzan und in Landfahrzeugen (IEC 60721-3-5:1997) This European Standard was approved by CENELEC on 1996-12-09. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Sta
13、ndard 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 Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, Fr
14、ench, 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 the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium
15、, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elekt
16、rotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60721-3-5:1997 EEN60721-3-5:1997 BSI 11-1999 2 Foreword The text of document75/281/FDIS,future editio
17、n2of IEC60721-3-5, prepared by IECTC76 “Optical radiation safety and laser equipment”, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN60721-3-5 on1996-12-09. This European Standard supersedes EN60721-3-5:1993 and its amendment A2:1994. The following dates were fixed:
18、 Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A and Annex B are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International
19、 Standard IEC60721-3-5:1997was approved by CENELEC as a European Standard 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 Annex A (informative) S
20、urvey of conditions affecting the choice of environmental parametersand their severities 10 Annex B (informative) Explanation of the environmental conditions in tropical areas asspecified in classes 5K5 and 5K6 23 Annex ZA (normative) Normative references tointernational publications with their corr
21、espondingEuropean publications 26 Figure 1 Model shock response spectra (firstorder maximax shock response spectra) 9 Figure B.1 Climatograms for tropical damp typeof climate and tropical dry type of climate 25 Table 1 Classification of climatic conditions 5 Table 1A Classification of special climat
22、ic conditions 6 Table 2 Classification of biological conditions 6 Table 3 Classification of chemically active substances 7 Table 4 Classification of mechanically active substances 7 Table 5 Classification of contaminating fluids 7 Table 6 Classification of mechanical conditions 8 latest date by whic
23、h the EN has 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 EN have to be withdrawn (dow) 1997-12-01EN 60721-3-5:1997 BSI 11-1999 3 1 Scope and object This standa
24、rd classifies the environmental conditions to which a product not forming part of the vehicle is subjected when installed in a ground vehicle. Such products are for example radios, communication systems, fare meters, flow meters for liquids transported by the vehicle, for example milk, petroleum pro
25、ducts, etc. Vehicles where products may be permanently or temporarily installed include road vehicles: passenger cars, commercial vehicles, special vehicles, towing vehicles, trailers, mopeds, motor cycles, etc.; rail vehicles: trains, trams, cranes, etc.; overland vehicles: four wheel drive cars, t
26、ractors, snow scooters, etc.; handling and storage vehicles: fork-lift trucks (manual and robot), luggage transporters, etc.; self-propelled machinery: diggers, harvesters, etc. Although this standard is not designed for products forming part of the vehicles, the environmental condition classificati
27、on may also be used for some exchangeable parts, installed in a similar way and in the same locations of the vehicle as products which do not form part of the vehicle. Only severe conditions which may be harmful to products are included. Conditions of storage and transportation are given in IEC721-3
28、-1and IEC721-3-2. The object of this standard is to classify the environmental parameters and their severities to which a product will be exposed under its conditions of use when installed in ground vehicles. A limited number of classes of environmental conditions are given, covering a broad field o
29、f application. The user of this standard should select the lowest class necessary covering each of the conditions of the intended use. Some guidance for this is given in Annex A. 2 Normative references The following normative documents contain provisions which, through reference in this text, consti
30、tute 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 on this section of IEC721-3are encouraged to investigate the possibility of applying the most recent editions o
31、f 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 Part 1: Environmental parameters and their severities. Amendment 1 (1992) Amendment 2 (1995) IEC 721-2-1:1982, C
32、lassification 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: Classification of groups of environmental parameters and their severities Introduction. Ame
33、ndment 1 (1987) IEC 721-3-1:1997, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 1: Storage. IEC 721-3-2:1997, Classification of environmental conditions Part 3: Classification of groups of environmental parameters
34、 and their severities Section 2: Transportation. 3 Definitions For the purpose of the present section of IEC721-3, the following definitions apply, in addition to the definitions in clause 3 of IEC721-1. 3.1 internally mounted the product is mounted internally in the vehicle, in a compartment which
35、affords some protection from the environment, ranging from complete isolation from external influences to protection only from precipitation when the vehicle is not moving 3.2 externally mounted the product is mounted on the outside of the vehicle. It is not protected from any external influencesEN
36、60721-3-5:1997 4 BSI 11-1999 3.3 weatherprotected location a location in which the vehicle is protected from direct weather influences. The locality is assumed to be reasonably ventilated (at least natural air flow) 4 General Reference to IEC721-3-0is strongly recommended in order to avoid misuse of
37、 the classes defined in the other sections of IEC 721-3. 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 differ
38、ent frequencies of occurrence related to a certain 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
39、occurrence is given, as clause 6, in 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 con
40、ditions of chemically or mechanically active substances. 5 Classification of groups of environmental parameters and their severities A limited number of classes for climatic conditions (K), special climatic conditions (Z), biological conditions (B), chemically active substances (C), mechanically act
41、ive substances (S), contaminating fluids (F) and mechanical conditions (M) are given in Table 1, Table 1A, Table 2, Table 3, Table 4, Table 5 and Table 6. For a given product reference should be made to the total set of classes, for example5K2/5B1/5C3/5S2/5F1/5M2. The basis of these classes is expla
42、ined in clause A.2 of Annex A. Climatic conditions in tropical areas as specified in classes 5K5 and5K6are explained in Annex B. The combination of the lowest classes 5K1/5B1/5C1/5S1/5F1/5M1 forms the condition to which a product will be subjected when being installed in, for example, smooth running
43、 vehicles used only in very restricted conditions (indoors). The combination of the highest classes 5K4/5B3/5C3/5S3/5F3/5M3 covers installations in a wide number of types of vehicles, including locations with very severe conditions. For a number of environmental parameters and classes special severi
44、ties are given for products installed in engine compartments. 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 severities. A summary of the conditions covered by the classes is given in clau
45、se A.3 of Annex A.EN 60721-3-5:1997 BSI 11-1999 5 Table 1 Classification of climatic conditions Environmental parameter Unit Class 5K1 5K2 5K3 5K4 5K4H 5K4L 5K5 h 5K6 h a) Low air temperature C + 5 25 40 65 25 65 + 5 20 b) High air temperature in ventilated compartments (except engine compartments)
46、oroutdoor air a C + 40 + 40 + 40 + 55 + 55 + 40 + 40 + 55 c) High air temperature, air in unventilated compartments, except engine compartments b C No + 70 + 70 + 85 + 85 + 70 + 70 + 85 d) High air temperature, air in engine compartments C + 60 + 70 + 70 + 85 + 85 + 70 + 70 + 85 e) Change of tempera
47、ture, air/air c C No 25/+ 30 40/+ 30 65/+ 30 25/+ 30 65/+ 30 + 5/+ 30 20/+ 30 f) Gradual change of temperature, air/air, except in engine compartments C C/min No No 25/+ 30 5 40/+ 30 5 65/+ 30 5 25/+ 30 5 65/+ 30 5 + 5/+ 30 5 20/+ 30 5 g) Gradual change of temperature, air/air, in engine compartment
48、s C C/min No No 25/+ 60 10 40/+ 70 10 65/+ 70 10 25/+ 70 10 65/+ 70 10 + 5/+ 70 10 20/+ 70 10 h) Change of temperature, air/water, except in engine compartments dc C No No + 40/+ 5 + 55/+ 5 + 55/+ 5 + 40/+ 5 + 40/+ 5 + 55/+ 5 i) Change of temperature, air/water, in engine compartments dc C No + 60/+
49、 5 + 70/+ 5 + 85/+ 5 + 85/+ 5 + 70/+ 5 + 70/+ 5 + 85/ 5 j) Change of temperature, air/snow, in engine compartments only C No + 60/ 5 + 70/ 5 + 70/ 5 + 70/ 5 + 70/ 5 + 70/ 5 + 70/ 5 k) Relative humidity, not combined with rapid temperature changes, except in engine compartments of vehicles powered by internal combustion engines % C 75 + 30 95 + 40 95 + 45 95 + 50 95 + 50 95 + 45 95 + 45 95 + 50 l) Relative humidity, not co
