1、3404583 0077559 680 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60654-1 June 1993 UDC 681.51 : 53.083 : 551.5 Descriptors: Industrial-process, measurement, control, operating conditions, temperature, humidity, barometric pressure Supersedes HD 413.1 S1 : 1981 English version Industrial-proc
2、ess measurement and control equipment - Operating conditions Part 1 : Climatic conditions (IEC 654-1 : 1993) Matriels de mesure et de commande dans les processus industriels - Conditions de fonctionnement Partie 1: Conditions climatiques (CE1 654-1 : 1993) Leittechnische Einrichtungen fr industriell
3、e Prozesse Umgebungsbedingungen Ri1 1: Klimatische Einflsse (IEC 654-1 1993) This European Standard was approved by CENELEC on 1993-03-09. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nat
4、ional 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
5、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, Franc
6、e, 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 Elektrotechnische Normung Cent
7、ral Secretariat: rue de Stassart 35, B-1050 Brussels O 1993 Copyright reserved to CENELEC members Ref. No. EN 60654-1 : 1993 E 9 3404583 00775b0 3T2 W Page 2 EN 60664-1 : 1993 Foreword The text of document 65A(C0)31, as prepared by Sub-committee 65A, System aspects, of IEC Echnical Committee 65, Ind
8、ustrial-process measurement and control, was submitted to the IEC-CENELEC parallel vote in February 1992. The reference document was approved by CENELEC as EN 60664-1 on 9 March 1993. This European Standard replaces HD 413.1 S1 : 1981. The following dates were fixed: - latest date of publication of
9、an identical national standard (dop) 1994-02-01 - latest date of withdrawal of conflicting national standards (dow) 1994-02-01 Annexes designated normative are part of the body of the standard. Annexes designated informative are given only for information. in this standard, annex A is informative an
10、d annex ZA is normative. 3404583 0077563 239 Clause Page 3 EN 60654-1 : 1993 CONTENTS 1 Scope . 2 Normative references . 3 General 4 Location classes with respect to climatic conditions 4.1 Air-conditioned locations (Class A) 4.2 Heated and/or cooled enclosed locations (Class B) . 4.3 Sheltered loca
11、tions (Class C) . 4.4 Outdoor locations (Class D) 4.5 Climatic condition parameters . . . Annex A Climatograms for location classes 4 5 5 6 10 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 28 Figures A . 1 A.2
12、A.3 A.4 A.5 A.6 A7 A9 A10 A.11 A.12 A.13 A.14 A.15 A.16 A17 A.18 A.a Location Class Al Location Class Al Location Class B1 Location Class B1 Location Class 82 Location Class 82 Location Class B3 Location Class 83 Location Class C1 Location Class C1 Location Class C2 Location Class C2 Location Class
13、C3 Location Class C3 Location Class D1 Location Class D1 Location Class D2 Location Class 02 Presentation 1 . Presentation 2 . Presentation 1 . Presentation 2 . Presentation 1 . Presentation 2 . Presentation 1 . Presentation 2 . Presentation 1 . Presentation 2 . Presentation 1 . Presentation 2 . Pre
14、sentation 1 . Presentation 2 . Presentation 1 . presentation 2 . Presentation 1 . Presentation 2 . 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 H 3404583 O077562 i175 Page 4 EN 60654-1 : 1993 INDUSTRIAL-PROCESS MEASUREMENT AND CONTROL EQUIPMENT - OPERATING CONDITIONS - Part 1 : Climatic con
15、ditions 1 Scope The purpose of this part of IEC 654 is 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 locat ions. This part l
16、ists environmental climatic conditions e.g. air temperature, 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
17、 transportation. Maintenance and repair conditions are 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 environ- mental conditions on personnel are not within the s
18、cope of this part. The influence quantities considered in 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
19、severity levels for the environmental conditions listed. Other environmental conditions are covered in other parts of the standard. The limit values of this part are defined and specified in IEC 721-3-3 and IEC 721-3-4. It is intended to serve as a basic for the preparation of comprehensive specific
20、ations for environmental conditions by the user and by the 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 p
21、ari is to aid in the choice of severity levels for use in the development of evaluation specifications of industrial-process measurement and control equipment. m 3404583 O077563 00% = Page 5 EN 60654-1 : 1993 2 Normative references The following normative documents contain provisions which, through
22、reference in this text, constitute provisions of this patt of IEC 654. At the time of publication of this standard, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 654 are encouraged to investigate the possibilit
23、y of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 721-3-1 : 1987, Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and t
24、heir severities - Storage Amendment 1 (1991) IEC 721 -3-2: 1985. Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Transportation Amendment 1 (1991) IEC 721 -3-3: 1987, Classification of environmental conditions - Part 3:
25、 Classification of groups of environmental parameters and their severities - Stationary use at weather- protect ed loca tio n Amendment 1 (1991) IEC 721 -3-4: 1987, Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Statio
26、nary use at non- weatherprotected locations Amendment 1 (1991) 3 General A limited number of location classes with respect to climatic conditions is given in clause 4. The established classes may be applied also for storage and/or transportation (e.g. Class 62 for operation may be combined with Clas
27、s C2 for transportation). Otherwise, it is recommended to refer to the appropriate classes of IEC 721-3-1 and IEC 721 -3-2. 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
28、 conditions and are considered as having a low probability of being exceeded. It is recognized that extreme or special environmental conditions may exist where values are greater and/or less than the stated values. To accommodate this situation, “special“ categories for environmental conditions are
29、provided. Specifications for equipment to operate under “special“ conditions are a matter for negotiation between user and supplier but it is recommended to use values taken from IEC 721-3-1, IEC 721-3-2, IEC 721-3-3 and IEC 721 -3-4. W 3Li04583 00775bLi TY8 W Page 6 EN 60654-1 : 1993 4 Location cla
30、sses with respect to climatic conditions Subclauses 4.1 to 4.5 establish types of locations such as: a) Weatherprotected locations: - Class A: air-conditioned locations: - Class B: heated and/or cooled enclosed locations; - Class C: sheltered andlor unheated enclosed locations: b) Non-weatherprotect
31、ed 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 climatic classes of IEC 721-3-3 and IEC 721-3-4 as listed in table 1. Climatograms for the location classes are ill
32、ustrated 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 considered as location temperature measured at a representative point within the local environment, including
33、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 measurement. When a number of instruments are concentrated in one place, the actual air temperature and the c
34、orresponding 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 specify the amount of heat generated by his equipment, so that adequate measures can be taken to dissipate this he
35、at. Temperature gradients are specified for all locations. When the rate of change is signi- ficant, it should be considered. Solar radiation is specified for all locations. Classes A and B should include solar radiation if equipment is located near windows. Temperature gradients in the space of loc
36、al environments 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 the physical and material characteristics of the equipment which will occupy the local environment. The
37、occurrence of condensation, wind-driven precipitation and formation of ice is also specified. W 3404583 00775b5 984 Page 7 EN 60654-1 : 1993 Detailed specifications for the air quality and other conditions important for the proper operation and life of equipment on locations which are not otherwise
38、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 environmental pressure in certain locations. Air pressures other
39、 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 locations are frequently provided for process-control computers
40、 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 6) For heated and/or cooled enclosed locations (Class B), only a
41、ir temperature is controlled within specified limits. Heated andlor 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 is not an air-conditioned location). Storage of equipme
42、nt 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). For Class 83, occasional condensation may occur, particularly at
43、 high relative humidity, but is normally of short duration. 4.3 Sheltered locations (Class C) For sheltered locations (Class C), neither air temperature nor humidity is controlled and equipment is protected against direct exposure to such climatic elements as direct solar radiation, rainfall, other
44、precipitation, and full wind pressure, etc. Enclosed locations which are neither heated nor cooled are considered sheltered locations. Neither heating nor cooling is normally provided. Ventilation, if any, is usually by natural means. Low temperatures may be as low as those of outdoor atmospheric co
45、nditions; high temperatures may be considerably greater than those of outdoor atmospheric conditions (due to solar radiation action on the shelter). 3404583 0077566 810 Page 8 EN 60654-1 : 1993 Since the shelter may not be completely tight, these locations may be subject to some (lim- ited) wind-dri
46、ven precipitation. Typical of sheltered locations are “shacks” for operating instruments, unheated ware- houses for storage and enclosed-bodied trucks for transportation. It may be noted that in some types of warehouses (and occasionally in other sheltered locations), humidity may rise to values whi
47、ch result in condensation on stored equipment. Transmitters, final control elements and some indicators separate from controllers are often located in sheltered locations. Controllers, recorders and other equipment may operate in sheltered locations when frequent operator attention is not important.
48、 Condensation may occur. In addition to occasional condensation due to rapid temperature changes, equipment located in these locations may be subjected to wind-driven preci- pitation, dripping water and water spray. 4.4 Outdoor locations (Class O) For outdoor locations (Class O). neither air tempera
49、ture nor humidity are controlled and the equipment is exposed to atmospheric conditions such as direct solar radiation, wind, rain, hail, sleet, snow and icing. Sensors, transmitters, final control elements and actuators as well as some indicators separate from controllers are often located in outdoor locations. It should be noted that rapid changes of atmospheric temperature can occur in outdoor locations. Of particular importance is the temperature gradient between sunny and shaded areas of exposed equipment. The temperature of equipment may change rapidly (for instance, an ap
