BS-EN-60721-3-7-1996 IEC-60721-3-7-1995.pdf

BRITISH STANDARD BS EN 60721-3-7: 1996 IEC 721-3-7: 1995 Incorporating Amendment No. 1 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 3.7 Portable and non-stationary use The European Standard EN 60721-3-7:1995 has the status of a British Standard ICS 19.040 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60721-3-7:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1996 © BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference GEL/50/-/1 Draft for comment 93/209314 DC ISBN 0 580 25138 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/50, Environmental testing of electrotechnical products, to panel GEL/50/-/1, Coordination of IEC/TC 75 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.DateComments 9515June 1997Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60721-3-7:1996 © BSI 04-2000i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60721-3-73 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60721-3-7:1996 ii © BSI 04-2000 National foreword This Section of BS EN 60721 has been prepared by panel GEl/50/-/1 and is the English language version of EN 60721-3-7:1995 Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 7: Portable and non-stationary use including amendment A1:1997, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 721-3-7:1995 including Amendment 1:1996 published by the International Electrotechnical Commission (IEC). This standard supersedes BS EN 60721-3-7:1993 which is withdrawn. A British Standard 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. Cross-references Publication referred toCorresponding British Standard HD 478.1 S2:1994a (IEC 721-1:1990) BS EN 60721 Classification of environmental conditions Part 1:1996 Environmental parameters and their severities HD 478.2.1 S1:1989 (IEC 721-2-1:1982) BS 7527 Classification of environmental conditions Part 2 Environmental conditions appearing in nature Section 2.1:1991 Temperature and humidity BS EN 60721 Classification of environmental conditions Part 3 Classification of groups of environmental parameters and their severities EN 60721-3-0:1993 (IEC 721-3-0:1984) Section 3.0:1993 Introduction EN 60721-3-2:1993 (IEC 721-3-2:1985) Section 3.2:1993 Transportation EN 60721-3-3:1995 (IEC 721-3-3:1994) Section 3.3:1995 Stationary use at weatherprotected locations EN 60721-3-4:1995 (IEC 721-3-4:1995) Section 3.4:1995 Stationary use at non-weatherprotected locations a HD 478.1 S2 has now been converted into EN 60721-1:1995 and this has been implemented as BS EN 60721-1:1996. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 30, 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. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 60721-3-7 February 1995 + A1 January 1997 ICS 19.040Supersedes EN 60721-3-7:1993 and its amendment Descriptors: Environmental conditions, groups of environmental parameters, non-stationary locations English version Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 7: Portable and non-stationary use (includes amendment A1:1997) (IEC 721-3-7:1995 + A1:1996) Classifications des conditions denvironnement Partie 3: Classification des groupements des agents denvironnement et de leurs sévérités Section 7: Utilisation en déplacement (inclut lamendement A1:1997) (CEI 721-3-7:1995 + A1:1996) Klassifizierung von Umweltbedingungen Teil 3: Klassen von Umwelteinflußgroßen und deren Grenzwerte Hauptabschnitt 7: Ortsveranderlicher Einsatz (enthält Änderung A1:1997) (IEC 721-3-7:1995 + A1:1996) This European Standard was approved by CENELEC on 1994-10-04. 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 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 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, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1995 Copyright reserved to CENELEC members Ref. No. EN 60721-3-7:1995 + A1:1997 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60721-3-7:1995 © BSI 04-2000 2 Foreword The text of document 75(CO)105 + 105A, future amendment to IEC 721-3-7, prepared by IEC TC 75, Classification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A3 to EN 60721-3-7:1993 on 1994-10-04. The text of this document, together with that of IEC 721-3-7:1987 and its amendments 1:1991 and 2:1993, was published by IEC as the second edition of IEC 721-3-7 in January 1995. According to a decision of principle taken by the Technical Board of CENELEC, the approval of EN 60721-3-7:1993/A3 has been converted into the approval of a new EN 60721-3-7. 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 and Annex D are informative. Annex ZA has been added by CENELEC. Foreword to amendment A1 The text of document 75/283/FDIS, future amendment 1 to IEC 721-3-7:1995, prepared by IEC TC 75, Classification of environmental conditions, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60721-3-7:1995 on 1996-12-09. The following dates were fixed: Contents Page Foreword2 1Scope3 2Normative references3 3Definitions4 4General4 5Classification of groups of environmental parameters and their severities4 6Sets of environmental condition class combinations6 Annex A (informative) Survey of conditions affecting the choice of environmental parameters and their severities12 Annex B (informative) Interdependence of air temperature, relative humidity and absolute humidity23 Annex C (informative) Examples for practical application of the classification specified in this standard24 Annex D (informative) Summary of conditions covered by sets of class combinations26 Annex E (informative) Explanation of the environmental conditions in tropical areas as specified in clauses 7K6 and 7K727 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications30 Figure 1 Model shock response spectra (first order maximax shock response spectra)11 Figure B.1 Climatogram. Interdependence of air temperature, relative air humidity and absolute air humidity24 Figure E.1 Climatograms for tropical damp type of climate and tropical dry type of climate29 Table 1 Classification of climatic conditions7 Table 2 Classification of special climatic conditions8 Table 3 Classification of biological conditions8 Table 4 Classification of chemically active substances9 Table 5 Classification of mechanically active substances9 Table 6 Classification of mechanical conditions10 Table 7 Sets of environmental class combinations10 latest date by which the EN has 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 national standards conflicting with the EN have to be withdrawn(dow) 1996-01-01 latest date by which the EN has 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 have to be withdrawn(dow) 1997-09-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60721-3-7:1995 © BSI 04-20003 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 environmental 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 locations. 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 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 performance 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 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 of IEC 721-3. 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 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 documents 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 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) IEC 721-2-1:1982, Classification of environmental conditions Part 2: Environmental conditions appearing in nature Section 1: 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 Section 0: Introduction. Amendment 1 (1987) IEC 721-3-2:1985, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 2: Transportation. Amendment 1 (1991), Amendment 2 (1993) IEC 721-3-3:1994, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 3: Stationary use at weatherprotected locations. IEC 721-3-4:1995, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 4: Stationary use at non-weatherprotected locations. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 06:15:42 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60721-3-7:1995 4 © BSI 04-2000 3 Definitions In addition to the definitions in clause 3 of IEC 721-1, the following definitions apply to this standard: 3.1 portable and non-stationary use the product is frequently moved from place 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 stationary or in a transfer state 3.2 weatherprotected location a location at which the product is protected from weather influences: totally weatherprotected location (enclosed location): direct weather influences are totally excluded; partially weatherprotected location (sheltered location): direct weather 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 IEC 721-3-0. Products in portable and non-stationary use are sometimes transferred from one location 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