1、BRITISH STANDARD BS EN 60721-3-7: 1996 IEC721-3-7: 1995 Incorporating Amendment No.1 Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Section3.7 Portable and non-stationary use The European Standard EN60721-3-7:1995 has the s
2、tatus of a BritishStandard ICS19.040BSEN60721-3-7:1996 This BritishStandard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comes intoeffect on 15February1996 BSI04-2000 The following BSI references relate to
3、the work on this standard: Committee referenceGEL/50/-/1 Draft for comment93/209314DC ISBN 0 580 25138 1 Committees responsible for this British Standard The preparation of this BritishStandard was entrusted by Technical Committee GEL/50, Environmental testing of electrotechnical products, to panelG
4、EL/50/-/1, Coordination of IEC/TC75 work, upon which the following bodies were represented: Federation of the Electronics Industry Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date Comments 9515 June 1997 Indicated by a sideline in the marginBSEN607
5、21-3-7:1996 BSI 04-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN60721-3-7 3 List of references Inside back coverBSEN60721-3-7:1996 ii BSI 04-2000 National foreword This Section of BS EN60721 has been prepared by panel GEl/50/-/1 and is the
6、English language version of EN60721-3-7:1995 Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Section7: Portable and non-stationary use including amendment A1:1997, published by the European Committee for Electrotechnical Sta
7、ndardization (CENELEC). It is identical with IEC721-3-7:1995 including Amendment1:1996 published by the International Electrotechnical Commission (IEC). This standard supersedes BS EN60721-3-7:1993 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a c
8、ontract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred to Corresponding British Standard HD478.1 S2:1994 a(IEC721-1:1990) BS EN60721 Classif
9、ication of environmental conditions Part1:1996 Environmental parameters and their severities HD478.2.1 S1:1989 (IEC721-2-1:1982) BS7527 Classification of environmental conditions Part2 Environmental conditions appearing in nature Section2.1:1991 Temperature and humidity BS EN60721 Classification of
10、environmental conditions Part3 Classification of groups of environmental parameters and their severities EN60721-3-0:1993 (IEC721-3-0:1984) Section3.0:1993 Introduction EN60721-3-2:1993 (IEC721-3-2:1985) Section3.2:1993 Transportation EN60721-3-3:1995 (IEC721-3-3:1994) Section3.3:1995 Stationary use
11、 at weatherprotected locations EN60721-3-4:1995 (IEC721-3-4:1995) Section3.4:1995 Stationary use at non-weatherprotected locations a HD478.1 S2 has now been converted into EN60721-1:1995 and this has been implemented as BSEN60721-1:1996. Summary of pages This document comprises a front cover, an ins
12、ide front cover, pagesi andii, theEN title page, pages2 to30, 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.EUROPEAN STANDARD NORME EUROPENNE
13、 EUROPISCHE NORM EN60721-3-7 February1995 +A1 January1997 ICS 19.040 Supersedes EN60721-3-7:1993 and its amendment Descriptors: Environmental conditions, groups of environmental parameters, non-stationary locations English version Classification of environmental conditions Part3: Classification of g
14、roups of environmental parameters and their severities Section7: Portable and non-stationary use (includes amendment A1:1997) (IEC721-3-7:1995+A1:1996) Classifications des conditions denvironnement Partie3: Classification des groupements des agents denvironnement et de leurs svrits Section7: Utilisa
15、tion en dplacement (inclut lamendement A1:1997) (CEI721-3-7:1995+A1:1996) Klassifizierung von Umweltbedingungen Teil3: Klassen von Umwelteinflugroen und deren Grenzwerte Hauptabschnitt7: Ortsveranderlicher Einsatz (enthlt nderung A1:1997) (IEC721-3-7:1995+A1:1996) This European Standard was approved
16、 by CENELEC on1994-10-04. 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 lists and bibliographical references concerning such national
17、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 responsibility of a CENELEC member into its own language and
18、 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, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerla
19、nd and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN60721-
20、3-7:1995+A1:1997EEN60721-3-7:1995 BSI 04-2000 2 Foreword The text of document75(CO)105+105A, future amendment to IEC721-3-7, prepared by IEC TC75, Classification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendmentA3 to EN60721-3-7:1993
21、 on1994-10-04. The text of this document, together with that of IEC721-3-7:1987 and its amendments1:1991 and2:1993, was published by IEC as the second edition of IEC721-3-7 in January1995. According to a decision of principle taken by the Technical Board of CENELEC, the approval of EN60721-3-7:1993/
22、A3 has been converted into the approval of a new EN60721-3-7. The following dates were fixed: 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, Annex B, Annex C an
23、d Annex D are informative. Annex ZA has been added by CENELEC. Foreword to amendment A1 The text of document75/283/FDIS, future amendment1 to IEC721-3-7:1995, prepared by IECTC75, Classification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC a
24、s amendment A1 to EN60721-3-7:1995 on1996-12-09. The following dates were fixed: Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definitions 4 4 General 4 5 Classification of groups of environmental parameters andtheir severities 4 6 Sets of environmental conditionclass combinations 6
25、Annex A (informative) Survey of conditions affecting the choice of environmental parametersand their severities 12 Annex B (informative) Interdependence of airtemperature, relative humidity and absolutehumidity 23 Annex C (informative) Examples for practicalapplication of the classification specifie
26、dinthis standard 24 Annex D (informative) Summary of conditions covered by sets of class combinations 26 Annex E (informative) Explanation of the environmental conditions in tropical areas asspecified in clauses7K6 and7K7 27 Annex ZA (normative) Other international publications quoted in this standa
27、rd with thereferences of the relevant European publications 30 Figure 1 Model shock response spectra (first order maximax shock response spectra) 11 Figure B.1 Climatogram. Interdependence ofairtemperature, relative air humidity and absolute air humidity 24 Figure E.1 Climatograms for tropical damp
28、type of climate and tropical dry type of climate 29 Table 1 Classification of climatic conditions 7 Table 2 Classification of special climatic conditions 8 Table 3 Classification of biological conditions 8 Table 4 Classification of chemically active substances 9 Table 5 Classification of mechanicall
29、y active substances 9 Table 6 Classification of mechanical conditions 10 Table 7 Sets of environmental class combinations 10 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1996-01-01 latest date by which the
30、 national standards conflicting with the EN haveto be withdrawn (dow) 1996-01-01 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1997-09-01 latest date by which the national standards conflicting with the EN
31、haveto be withdrawn (dow) 1997-09-01EN60721-3-7:1995 BSI 04-2000 3 1 Scope This standard classifies groups of environmental parameters and their severities to which products are subjected during portable and non-stationary use, including periods of transfer, down time, maintenance and repair. The en
32、vironmental conditions covered by these groups include: the environmental conditions at locations where the product may be placed or used temporarily; the change of environmental parameters due to change of location; the environmental conditions related to transfer of the product between different l
33、ocations. The environmental conditions classified do not take into account the use profile of the product, i.e.whether the product is used only during a temporary stationary state, during the state of transfer or arbitrarily. The conditions of portable and non-stationary use to which products may be
34、 exposed include land-based and offshore, weatherprotected and non-weatherprotected locations. The conditions further include transfer which is a part of the portable and non-stationary use. The environmental conditions specified in this standard are limited to those which may directly affect the pe
35、rformance of products. Only environmental conditions as such are considered. No special description of the effects of these conditions on the product is given. Environmental conditions directly related to fire or explosion hazards and conditions related to ionizing radiation are excluded. Any other
36、unforeseen incidents are also excluded. The possibility of their occurrence should be taken into account in special cases. Microclimate within a product is not included. Conditions of stationary use, use in vehicles, and ships, and conditions of storage and transportation are given in other sections
37、 of IEC721-3. A limited number of classes of environmental conditions is given, covering a broad field of application. The user of this standard should select the lowest classification necessary for covering the conditions of the intended use. 2 Normative references The following normative documents
38、 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 on this section of IEC721-3 are encouraged to
39、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. IEC721-1:1990, Classification of environmental conditions Part1: Environmental parameters and their sever
40、ities. Amendment1 (1992) IEC721-2-1:1982, Classification of environmental conditions Part2: Environmental conditions appearing in nature Section1: Temperature and humidity. Amendment1 (1987) IEC721-3-0:1984, Classification of environmental conditions Part3: Classification of groups of environmental
41、parameters and their severities Section0: Introduction. Amendment1 (1987) IEC721-3-2:1985, Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Section2: Transportation. Amendment1 (1991), Amendment2 (1993) IEC721-3-3:1994, Class
42、ification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Section3: Stationary use at weatherprotected locations. IEC721-3-4:1995, Classification of environmental conditions Part3: Classification of groups of environmental parameters and t
43、heir severities Section4: Stationary use at non-weatherprotected locations. EN60721-3-7:1995 4 BSI 04-2000 3 Definitions In addition to the definitions in clause3 of IEC721-1, the following definitions apply to this standard: 3.1 portable and non-stationary use the product is frequently moved from p
44、lace to place. During transfer there is no special packaging for the product. The total transfer time may amount to a significant portion of the products lifetime. The product is not permanently mounted on any structure or placed at a fixed site. The product may be operated while being either in a s
45、tationary or in a transfer state 3.2 weatherprotected location a location at which the product is protected from weather influences: totally weatherprotected location (enclosedlocation): direct weather influences are totally excluded; partially weatherprotected location (shelteredlocation): direct w
46、eather influences are not completely excluded. 3.3 non-weatherprotected location a location at which the product is not protected from direct weather influences 4 General For further general guidance, see IEC721-3-0. Products in portable and non-stationary use are sometimes transferred from one loca
47、tion to another without being switched on. During this transfer the environmental conditions bearing on the product may affect the product in a different way than during operation. If environmental conditions during operation are considered separately from those during transfer, another class, e.g.a
48、 lower one, may be selected for this part of the use. 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 dif
49、ferent frequencies of occurrence related to a certain period of time. Such frequencies of occurrence should be considered for any environmental parameter. They should additionally be specified if applicable. Information on duration and frequency of occurrence is given in IEC721-3-0 as clause6. 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 cond
