EN 60721-3-7-1995 en Classification of Environmental Conditions Part 3 Classification of Groups of Environmental Parameters and Their Severities Section 7 Portable and Non-Stationa.pdf

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1、BRITISH STANDARD 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-%7 : 1995 has the status of a British Standard ICs 19.040 NO COPYING WITHOUT BSI PE

2、RMISSION EXCEPT AS PEiBTED BY COPYRIGHT LAW BS EN 60721-3-7 : I996 lEC 721-3-7 : 1995 STD-BSI BS EN b0721-3-7-ENGL L77b m Lb24bb7 Db2407 383 W Amd.No. BS EN 607213-7 : 1996 he 2, June 1997 _ Date Text affected Committees responsible for this British Standard The preparation of this British Standard

3、was entrusted by Technical Committee GEMO, Environmental testing of eleclxotechnical products, to panel GEy50/-/1, Coordination of IECiIc 75 work, upon which the following bodies were represented Federation of the Electronics Indushy Society of Motor Manufacturers and R-aders Limited This British St

4、andard, having been prepared under the direction of the Electrotechnicai Sector tioard, was published under the authority of the Standards Board and comes into effect on 15 February 1996 O BSI 1997 9515 The following BSI references relate to the work on this standard: Committee reference GEL5OIJl Dr

5、aft for comment 93209314 DC STD*BSI BS EN b072L-3-7-ENGL 1776 U Lb24bb9 Ob24097 2LT = Ifsue 1, June 1997 BS EN 60721-3-7 1996 Summary of pages The following table identifies the current issue of each page. Issue 1 indicates that a page has been introduced for the first time by amendment. Subsequent

6、issue numbers indicate an updated page. Vertical sidelining on replacement pages indicates the most recent changes (amendment, addition, deletion). Front cover Inside front cover a b 1 11 EN title page 2 3to5 6 7 8 Issue 2 2 1 blank original 2 2 2 original 2 original original Page 9 10 to 23 24 25 2

7、6 to 31 32 32a 32b 33 34 Inside back cover Back cover Issue 2 Original 2 2 Original 2 1 1 Orighd blank Original Original O BSI 1997 a BS EN 607213-7 : 1996 Contents Committees responsible page inside front cover National foreword ii Foreword 2 Text of EN 60721-3-7 3 O BSI 1996 i SfD-BSI BS EN b072L-

8、3-7-ENGL L77b LbZrlbbS UbZrlLOL 7TA W BS EN 607213-7 : 1996 Issue 2, June 1997 National foreword This Section of BS EN 60721 has been prepared by panel GEKO/-/l and is the English anguage version of EN 60721 37 : 1995 Classi%atwn of enwmnmtal conditions Part 3: Classifzcation of eps of environmentd

9、parumeters and their Seventies Section ? Partable and non-stat.ionam/ use inchding amendment Al : 1997, published by the European Commiaee for Electrotechnid Standardization (CENELEC). It is identical with IEC 7213-7 : 1995 includmg Aniendnient 1 : 1996 published by the International Electrotechnica

10、l Commission (IEC). “his standard supersedes BS EN 60721-37 : 1993 which is withdram. Cross-references I Publication referred to HD 478.1 S2 : 1994) HD 478.2.1 S1 : 1989 (IEC 721-1 : 1990) (IEC 721-2-1 : 1982) EN 60721-3-0 : 1993 EN 60721-3-2 : 1993 (IEC 721-3-2 : 1985) EN 60721-3-3 : 1995 (IEC 7215

11、3 : 1994) EN 607213-4 : 1995 (iEC721-3-4: 1995) (IEC 7213-0 : 1984) Corresponding British Standard Bs EN 60721 Classification of enwmninentui conitwns Part 1 : 1996 Environmental pammeios and their severities BS 7527 Cassificat.iOn of enwnmmental conditions Part 2 Envinntmental conditions appeuring

12、in nature Seciion 2.1 : 1991 Tempemture and humidity BS EN 60721 Classmat3n of envmnmental conditions Part 3 classification of groups of environmental parameters and their s - the change of environmental parameters due to change of location; - the environmental conditions related to transfer of the

13、product between different locat ions. The environmental conditions classified do not take into account the use profile of the product, .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

14、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 whic

15、h 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 radiat

16、ion are excluded. Any other unforeseen incidents are also excluded. The possibility of their occurence 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

17、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. STD-BSI BS EN b0721-3-7-ENGL

18、 L77b 1b24bb7 Ob24105 343 Page 4 EN 60721-3-7 : 1995 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 doc

19、uments 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 Stand

20、 a rd s. IEC 721 -1 : 1990, Classification of environmental conditions - Part I: 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 humid

21、ity Amendment 1 (1987) IEC 721 -3-0: 1984, Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section O: Introduction Amendment 1 (1987) IEC 721 -3-2, 1985, Classification of environmental conditions - Part 3: Classificati

22、on 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

23、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 3 Definitions In addition to the definitions in clause 3 o

24、f 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

25、. 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

26、location (enclosed location): direct weather influences are totally excluded; - partially weatherprotected location (sheltered location): direct weather influences are not completely excluded. STD.BSI BS EN b072L-3-7-ENGL L99b Lb24bb9 0bZLiLOb 2T Page 6 EN 60721-3-7 : 1995 3.3 non-weatherprotected l

27、ocatlon: 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 en

28、vironmental 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 lower one, may be selected for this part of the use. The severities

29、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 different fre- quencies of occurrence related to a certain period of tim

30、e. Such frequencies of occurrence should be considered for any environmental parameter. They should additionally be specified if applicable. Information on duration and frequency of occurence is given in IEC 721-3-0 as clause 6. Attention is drawn to the fact that combinations of the environmental p

31、arameters 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. The environmental conditions present at a location may be affected by other

32、influences, e.g. heat dissipation sources, special process conditions, etc. Measurements of the environmental conditions present at a location should be made at a representative point in the vicinity of the product. It is recognized that extreme or special environmental conditions may exist. Specifi

33、cations for products to operate under such special conditions are a matter of negotiation between supplier and user. 5 Classlflcatlon of groups of environmental parameters and thelr severities A number of classes for climatic conditions (K), special climatic conditions (Z), biological conditions (e)

34、, chemically active substances (C), mechanically active substances (S) and mechanical conditions (M) are specified in tables 1 to 6. This classification allows a number of possible combinations of environmental conditions, which bear upon products wherever used. It represents the real situation in r

35、espect of worldwide conditions of use, due to local influences of open-air climate, construction of buildings, mounting, process conditions, etc. (See also clause 6.) STD-BSI BS EN b072L-3-7-ENGL 199b LbZqbbS Ob2qL07 11b Page 6 EN 60721-3-7 : 1995 Issue 2, June 1997 A class of conditions normally in

36、cludes all classes with lower severity digits. For certain parameters it has not yet been possible to specify quantitative severities. For a given use or product, reference should be made to the total set of classes, e.g. ex A explains the basis of the classes. It contains a summary of the condition

37、s .;vered by each class and gives a survey of conditions affecting the choice of environ- mental parameters and their severities. Annex B contains a climatogram showing the interdependence of air temperature, relative humidity and absolute humidity. Annex C gives three examples for practical applica

38、tion of this classification. 5.1 Climatic conditions The climatic conditions specified for classes 7K1 to 7K5 represent the conditions of portable and non-stationary use of products. They have been experienced worldwide over a long period of time taking into account all the parameters that can influ

39、ence them. e.g. external (open-air) climatic conditions, type of building construction. temperature/humidity controlling systems, means of transfer and internal conditions, ag. heat dissipation from other equipment, presence of humans, etc. The conditions should cover all normal cases, but not excep

40、tional events. “mtk conditions in tropical areas as specified in classes 7K6 and 7K7 are explained in annex E. . , ited enclosures of means of transport e of climate Class 7 K3 - 100 Page 17 EN 60721-3-7 : 1995 7K2 7K3 -5 -25 +25 +30 xxx . _ -. - - xxx xx .-.- 70 70 222 xxx . _ -. - _ 106 106 xxx qe

41、gli- Negli- gible gible xx . - -. - - A.2.1 K. Climatic conditions (continued) 7K4 -40 +30 - - - X 70 - - 106 Negli gible X - - Condition of use g) Rapid chaiige o/ air temperature “C Temperature controlled weatherprotected locations. Heating or cooling may be switched off for periods, but occurrenc

42、e of extreme temperatures is prevented. Transfer directly between such locations Weatherprotected locations without temperature control. Where necessary, heating may be. used or building construction is designed to avoid extreme temperatures. Transfer directly between such locations Locations direct

43、ly exposed to open-air climate. Locations in ventilated enclosures of means of ground transport or heated compartments of aircraft. Locations in ali types of buildings. Transfer directly between such locations Locations in unventilated compartments of means of transport including unheated aircraft h

44、olds. Transfer directly between such locations h) Loir air pressure (see table 2) k Pa Any location, excluding unpressurized aircraft companments Any location, including unpressurized aircraft compartments i) HiRh air pressure k Pa Locations on surfaces vented to the surrounding atmosphere Locations

45、 in pressurized compartments of aircraft i) Rare of clrarige of air preswre k Pa/mi n An! locaiion, excluding unpressurized aircraft compart ments Any location. including unpressurized aircraft compartments Je of climate - 7K I _. - +5 +25 ClaSS Page 18 EN 60721-3-7 : 1995 A.2.1 K. Climatic conditio

46、ns (concluded) mate Class - 7K3 - 1120 eofc I 7KI 7K2 1 Condition of use k) Solar radiaiion W/m2 Totally weatherprotected locations Locations directly exposed to open-air climate. Panially weatherprotected locations I) Hear radiuiiori (sae Onary wbmtion. sinusoidal: sphcement amplitude mm accelerati

47、on ampli m/S2 freqoency range Hz Locations with 0.9. vibratims hm machines placed or mounted on the same sbudure. Careful handling and transfer by humans humans with low physical activities or not using other tools with high mechanical input at the same time). Transfer means are e.g. wellcushioned t

48、roiieys and carts. mad whides in areas with well dewbped mads, trains with soft suspension, ships, aircraft 3.5 2-9 9-200 200-500 10 15 7.5 20 40 2-8 8-200 200-500 3.5 2-9 9-200 200-500 10 15 X X X Locations with e.g. vibrations from machines placed or mounted on ihe same structure. Rough handling a

49、nd transfer by humans (humans with hgh physical activities or using tools with high medianical input at the same time). Transfer means are e.g. uncushioned trolleys and tarts. road Mides in areas without weil developed road systems, irailers, trains with hard suspension X b) Staiionary vibratbn, random: acceleration spectral density mZ/s3 Erequmcy range Hz Transfer by jet aircraft. air cushioned road vehicles. air cushioned trailen, other road vehicles in areas with weil developed road systems, bains with sot suspension. forklift bucks (only 10 Hz to 500 Hz). e