1、BRITISH STANDARD BSEN 60654-1:1993 IEC654-1: 1993 Industrial-process measurement and control equipment Operating conditions Part1: Climatic conditions The European Standard EN60654-1:1993 has the status of a British Standard UDC 681.51:53.083:551.5BSEN60654-1:1993 This British Standard, having been
2、prepared under the directionof the Industrial-processMeasurement and ControlStandards Policy Committee, was published underthe authority of the Standards Board and comes intoeffect on 15September1993 BSI05-1999 The following BSI references relate to the work on this standard: Committee reference PCL
3、/1 Draft for comment90/25999DC ISBN 0 580 22242 X Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembou
4、rg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN60654-1:1993 BSI 05-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Forewo
5、rd 2 Text of EN60654-1 3 National annex NA (informative) Committees responsible 26BSEN60654-1:1993 ii BSI 05-1999 National foreword This British Standard has been prepared under the direction of the Industrial-process Measurement and Control Standards Policy Committee and is the English language ver
6、sion of EN60654-1:1993 Industrial-process measurement and control equipment Operating conditions Part1: Climatic conditions, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC654-1:1993 published by the International Electrotechnical Commissi
7、on (IEC). This standard supersedes BS5967-1:1980 which is withdrawn.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 immun
8、ity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2to26 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendm
9、ent table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60654-1 June1993 UDC681.51:53.083:551.5 Supersedes HD413.1S1:1981 Descriptors: Industrial-process, measurement, control, operating conditions, temperature, humidity, barometric pressure English version Industrial-
10、process measurement and control equipment Operating conditions Part1: Climatic conditions (IEC654-1:1993) Matriels de mesure et de commande dans les processus industriels Conditions de fonctionnement Partie 1: Conditions climatiques (CEI654-1:1993) Leittechnische Einrichtungen fr industrielle Prozes
11、se Umgebungsbedingungen Teil1: Klimatische Einflsse (IEC654-1:1993) This European Standard was approved by CENELEC on1993-03-09. 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 sta
12、ndard 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 ot
13、her 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, German
14、y, 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 Elektrotechnische Normung Central Secre
15、tariat: rue de Stassart 35, B-1050 Brussels 1993 Copyright reserved to CENELEC members Ref. No. EN60654-1:1993EEN60654-1:1993 BSI 05-1999 2 Foreword The text of document65A(CO)31, as prepared by Sub-committee65A, System aspects, of IEC Technical Committee65, Industrial-process measurement and contro
16、l, was submitted to the IEC-CENELEC parallel vote in February1992. The reference document was approved by CENELEC as EN60654-1 on9March1993. This European Standard replaces HD413.1S1:1981. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes de
17、signated “informative” are given only for information. In this standard, Annex A is informative and Annex ZA is normative. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 General 3 4 Location classes with respect to climatic conditions 4 4.1 Air-conditioned locations (Class A) 4 4.2 He
18、ated and/or cooled enclosed locations (Class B) 4 4.3 Sheltered locations (Class C) 5 4.4 Outdoor locations (Class D) 5 4.5 Climatic condition parameters 6 Annex A (informative) Climatograms for location classes 7 Annex ZA (normative) Other international publications quoted in this standard with the
19、 references of the relevant European publications 25 Figure A.1 Location Class A1 Presentation 1 7 Figure A.2 Location Class A1 Presentation 2 8 Page Figure A.3 Location Class B1 Presentation 1 9 Figure A.4 Location Class B1 Presentation 2 10 Figure A.5 Location Class B2 Presentation 1 11 Figure A.6
20、 Location Class B2 Presentation 2 12 Figure A.7 Location Class B3 Presentation1 13 Figure A.8 Location Class B3 Presentation2 14 Figure A.9 Location Class C1 Presentation1 15 Figure A.10 Location Class C1 Presentation2 16 Figure A.11 Location Class C2 Presentation1 17 Figure A.12 Location Class C2 P
21、resentation2 18 Figure A.13 Location Class C3 Presentation1 19 Figure A.14 Location Class C3 Presentation2 20 Figure A.15 Location Class D1 Presentation1 21 Figure A.16 Location Class D1 Presentation2 22 Figure A.17 Location Class D2 Presentation1 23 Figure A.18 Location Class D2 Presentation2 24 Ta
22、ble 1 Climatic condition parameters and severities for classes of location 6 latest date of publication ofan identical national standard (dop)1994-02-01 latest date of withdrawal ofconflicting national standards (dow)1994-02-01EN60654-1:1993 BSI 05-1999 3 1 Scope The purpose of this part of IEC654 i
23、s to provide users and suppliers of industrial-process measurement and control systems and parts of such systems with a uniform listing of the selected environmental conditions to which equipment may be exposed in specified locations. This part lists environmental climatic conditions e.g.air tempera
24、ture, humidity and air pressure in specified locations to which land-based and offshore industrial-process measurement and control systems may be exposed during operation, during periods when they are installed but inactive and during storage or transportation. Maintenance and repair conditions are
25、not considered. Environmental conditions directly related to fire and explosion hazards and conditions related to ionized radiation are likewise not considered. Effects of the specific environmental conditions on personnel are not within the scope of this part. The influence quantities considered in
26、 this part are limited to those which may directly affect the performance of process measurement and control systems. Only environmental conditions as such are considered. This part establishes location classes with severity levels or sets of severity levels for the environmental conditions listed.
27、Other environmental conditions are covered in other parts of the standard. The limit values of this part are defined and specified in IEC721-3-3 and IEC721-3-4. It is intended to serve as a basis for the preparation of comprehensive specifications for environmental conditions by the user and by the
28、supplier. One of the purposes of this part is to avoid problems which might result from neglecting considerations of specific environmental conditions affecting the performance of systems and parts of systems. An additional purpose of this part is to aid in the choice of severity levels for use in t
29、he development of evaluation specifications of industrial-process measurement and control equipment. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC654. At the time of publication of this sta
30、ndard, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC654 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO main
31、tain registers of currently valid International Standards. IEC721-3-1:1987, Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Storage. Amendment1 (1991) IEC721-3-2:1985, Classification of environmental conditions Part3: Classi
32、fication of groups of environmental parameters and their severities Transportation. Amendment1 (1991) IEC721-3-3:1987, Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Stationary use at weather-protected location. Amendment1
33、(1991) IEC 721-3-4:1987, Classification of environmental conditions Part3: Classification of groups of environmental parameters and their severities Stationary use at non-weatherprotected locations. Amendment1 (1991) 3 General A limited number of location classes with respect to climatic conditions
34、is given in clause4. The established classes may be applied also for storage and/or transportation (e.g.Class B2 for operation may be combined with Class C2 for transportation). Otherwise, it is recommended to refer to the appropriate classes of IEC721-3-1 and IEC721-3-2.EN60654-1:1993 4 BSI 05-1999
35、 Parameter severity values of the various operating conditions are shown by limit values rather than by means of average values. These values cover usual ranges of environmental conditions and are considered as having a low probability of being exceeded. It is recognized that extreme or special envi
36、ronmental conditions may exist where values are greater and/or less than the stated values. To accommodate this situation, “special” categories for environmental conditions are provided. Specifications for equipment to operate under “special” conditions are a matter for negotiation between user and
37、supplier but it is recommended to use values taken from IEC721-3-1, IEC721-3-2, IEC721-3-3 and IEC721-3-4. 4 Location classes with respect to climatic conditions Subclauses4.1 to4.5 establish types of locations such as: a) Weatherprotected locations: Class A: air-conditioned locations; Class B: heat
38、ed and/or cooled enclosed locations; Class C: sheltered and/or unheated enclosed locations; b) Non-weatherprotected locations: Class D: outdoor locations. These types of locations are based on appropriate combinations of climatic condition parameters and their limit values, corresponding to the clim
39、atic classes of IEC721-3-3 and IEC721-3-4 as listed in Table 1. Climatograms for the location classes are illustrated in the charts given in Annex A, since a simple description of a realistic combination of, for example, high temperature and high humidity is difficult to make. Temperature shall be c
40、onsidered as location temperature measured at a representative point within the local environment, including adjacent heat-generating equipment. It shall be taken into account that solar radiation may increase the temperature on the surface of equipment. Similar considerations apply to the humidity
41、measurement. When a number of instruments are concentrated in one place, the actual air temperature and the corresponding relative humidity may differ locally from the air temperature and humidity at the representative point, due to the heat generated by the instruments. The manufacturer shall speci
42、fy the amount of heat generated by his equipment, so that adequate measures can be taken to dissipate this heat. Temperature gradients are specified for all locations. When the rate of change is significant, it should be considered. Solar radiation is specified for all locations. ClassesA and B shou
43、ld include solar radiation if equipment is located near windows. Temperature gradients in the space of localenvironments caused by such phenomena as one-sided radiation or cold wind can produce thermal stress in equipment. Preferred values of gradients are not specified because they are dependent on
44、 the physical and material characteristics of the equipment which will occupy the local environment. The occurrence of condensation, wind-driven precipitation and formation of ice is also specified. Detailed specifications for the air quality and other conditions important for the proper operation a
45、nd life of equipment on locations which are not otherwise covered in this part are matters for negotiation between user and supplier. Some variations of air pressure are due to weather conditions; major variations are, in general, the result of altitude. Artificial pressurization may increase enviro
46、nmental pressure in certain locations. Air pressures other than those specified are matters of negotiation between user and supplier. 4.1 Air-conditioned locations (Class A) For air-conditioned locations (Class A), both air temperature and humidity are controlled within specified limits. These locat
47、ions are frequently provided for process-control computers and other electronic equipment requiring a controlled air environment. Major central control rooms with equipment for critical levels of process control are normally in this category. 4.2 Heated and/or cooled enclosed locations (Class B) For
48、 heated and/or cooled enclosed locations (ClassB), only air temperature is controlled withinspecified limits. Heated and/or cooled enclosed locations are commonly provided for operation of parts of a control system where operator surveillance on a continuous basis is required (i.e.when the location
49、is not an air-conditioned location). Storage of equipment is frequently (preferably) in a heated and/or cooled enclosed location. Heating and cooling are not generally available during transportation. Enclosed means of transportation are normally considered “sheltered locations” (Class C).EN60654-1:1993 BSI 05-1999 5 For Class B3, occasional condensation may occur, particularly at high relative humidity, but is normally of short duration. 4.3 Sheltered locations (Class C) For sheltered locati
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1