1、BRITISH STANDARD Telecontrol equipment and systems Part 2. Operating conditions Section 2. Environmental conditions (climatic, mechanical and other non-electrical influences) BS EN 60870-2-2 : 1997 IEC 870-2-2 : 1996 * rn * The European Standard EN 60870-2-2 : 1996 has the status of a British Standa
2、rd ICs 33.200 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN b870-2-2-ENGL 1797 Lb29bb7 0579988 b77 9 BS EN 60870-2-2 : 1997 Committees responsible for this British Standard The prepasation of this British Standard was entrusted to Technical Committee PEy57, Pow
3、er systems control and associated comunidom, upon which the following bodies were represented: BEAMA Metering Association MA) Buiding Automation and Mains Si Association ASMA) Electricity Association Federation of the Electronics Industxy GAMBICA Institution of Electrical Engineers Ti.ansmission and
4、 Distribution Association PEAMA Ltd.) This British Standard, having been prepared under the direction of the Electrotechnicai Sector Board, was published under the authority of the Standards Board and comes into effect on 15 March 1997 O BSI 1997 Amendments issued since publication ID Operating cond
5、itions Section 2 : Environmental conditions (climatic, mechunicd and 0th- non-eleccmcal influencm), published by the European Committee for Electrokchnical Sadardization (CENELEC). It is identical with IEC 870-2-2 : 1996, published by the Jnkmationa. Electsotechnical Commission (IEC). Cross-referenc
6、es Publication referred to EN 60654-1 : 1993 (IEC 654-1 : 1993) IEC 654-4 : 1987 HD 478.2.1 S1 (IEC 721-2-1 : 1982) EN 60721-3-1 : 1993 EN 60721-3-2 : 1993 (IEC 721-3-2 : 1987) EN 6072133 : 1995 (IEC 721-3-3 : 1994) EN 60721-3-4: 1995 (IEC 721-34 : 1995) (IEC 721-3-1 : 1987) Corresponding British St
7、andard BS EN 60654-1 Industridpmcess measurement and control equipment - Opemting conditions Part 1 : 1993 Ciimatic conditions BS 5967 Opemtiw conditions for industriuhpmess measurement and control equipment Past 4 : 1988 Clusfication of corrosive and erosive mvimmenta conditions BS 7527 Clasfiation
8、 of enwim- conditions Part 2 Environmental conditions appearing in nature Section 2.1 : 1991 lkmpemhre and humidity BS EN 6072131 : 1993 Classification of enwironmenta Cdith Part 3 Classification of groups of entrimmtal parameters and their severities Section 3.1 : 1993 Storage Section 3.2 : 1993 Tr
9、ansporation Section 3.3 : 1995 Stationary use at weatherprotected locations Section 3.4 : 1995 Statwnary use at non-weatbpvtected locations This is one of a family of standards being generated and below is a iist of the ones that have been published International No IEC 870-1-1 : 1988 IEC 870-1-2 :
10、1989 IEC 870-13 : 1990 IEC 870-1-4 : 1994 EN 60870-2-1 : 1996 (IEC 870-2-1 : 1995) EN 60870-2-2 : 1996 (IEC 870-2-2 : 1996) HD 546.3 SI (EC 8703 : 1989) HD 546.4 s1 (IEC 870-4 : 1990) British Standards publication BS 7404 Thontml equipment and systems Part 1 Gmemd considerations Section 1.1 : 1991 G
11、eneraL principk Section 1.2 : 1991 Guide for speafications Section 1.3 : 1991 Glossary Section 1.4 : 1995 Guide for basic aspects of teleconhl datu tmn.m corrosive and erosive influences of physical and chemical agents in the air as well as mechanical influences (vibrations, mechanical shocks, earth
12、quakes). With reference to climatic and mechanical conditions, this section has been prepared following the general indications of IEC Guide 106 and the general classification of environmental conditions given in IEC 721, in particular in IEC 721-3-1, IEC 721-3-2, IEC 721-3-3 and IEC 721-3-4; in add
13、ition, IEC 654-1 has been considered. As regards corrosive and erosive influences, reference is only made to IEC 654-4, developed for industrial process measurement and control equipment, considered applicable also to telecontrol equipment and systems and to other equipment and systems included in t
14、he scope of the present standard. STDmBSI BS EN b0870-2-2-ENGL 1997 W 1b24bb9 059797b 793 W Page 6 EN 60870-2-2 : 1996 TELECONTROL EQUIPMENT AND SYSTEMS - Part 2: Operating conditions - Section 2: Environmental conditions (climatic, mechanical and other non-electrical influences) 1 Scope and object
15、This section of IEC 870-2 applies to telecontrol equipment and systems with coded bit serial data transmission for monitoring and control of geographically widespread processes. It is also a reference standard for teleprotection equipment and systems and for equipment included in a distribution line
16、 carrier (DLC) communication system supporting a distribution automation system (DAS) and also for associated communications such as power line carrier. This section specifies classes for environmental conditions (climatic, mechanical and other non-electrical influences) under which the various comp
17、onents of the systems have to operate. Particular conditions directly related to fire and explosion hazards and to ionizing radiation are not considered. Detailed specifications for any other environmental conditions (including those related to mobile installations), not covered in this section but
18、relevant for the proper operation and life of the equipment, are matters for negotiation between user and supplier. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 870-2. At the time of pu
19、blication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this section of IEC 870-2 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC an
20、d IS0 maintain registers of currently valid international Standards. IEC 68: Environmental testing L IEC 654-1: 1993, Industrial process measurement and control equipment - Operating conditions - Part 7: Climatic conditions IEC 654-4: 1987, Operating conditions for industrial-process measurement and
21、 control equipment - fart 4: Corrosive and erosive influences IEC 721 -2-1: 1982, Classification of environmental conditions - fart 2: Environmental conditions appearing in nature - Temperature and humidity Page 6 EN 60870-2-2 : 1996 IEC 721 -3-1 : 1987, Classification of environmental conditions -
22、Part 3: Classification of groups of environmental parameters and their severities - Storage IEC 721 -3-2: 1985, Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Transportation IEC 721 -3-3: 1994, Classification of enviro
23、nmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 3: Stationary use at weather- protected locations IEC 721 -3-4: 1995, Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their s
24、everities - Section 4: Stationary use at non- weatherprotected locations IEC Guide 106: 1989, Guide for specifying environmental conditions for equipment performance rating 3 Climatic conditions 3.1 General This clause lists, for certain specified locations, different classes of environmental climat
25、ic conditions (air temperature, humidity and pressure, rain, snow, ice, solar radiation, etc.) to which the equipment and systems may be exposed during operation, during periods when they are installed but inactive (e.g. during maintenance and repair), and during storage or transportation. Each clas
26、s considers a severity level or a set of severity levels for the various environmental climatic parameters: the severity levels are intended, according to the definition given in the IEC 721 series, as values having a low probability of being outside of the limits (e.g. 1 %). According to the recomm
27、endations of Guide 106, the classes reported in this section of IEC 870-2 are taken from the complete list of classes reported in IEC 721, taking into account the most common climatic conditions applicable to the equipment and systems object of this section. With reference to operational and storage
28、 conditions, table 1 lists the parameters of the classes chosen for the above-mentioned equipment and systems, with reference to four types of location defined in the following; annex A shows the climatograms giving the interdependence of air temperature, relative humidity, absolute humidity and an
29、example of application. Table 2 gives an additional classification with reference to transportation conditions. Since it is recognized that extreme or special environmental conditions not covered by the normal classes may exist, tables 1 and 2 consider, for each type of location, a “special class. S
30、pecifications for equipment to operate under special“ conditions are a matter for negotiation between user and supplier; however, it is recommended to choose classes from the IEC 721 series. STDmBSI BS EN bO870-2-2-ENGL 1977 = Lb24bb7 0577778 5Lb = Page 7 EN 60870-2-2 : 1996 3.2 Types of location Th
31、e following types of location are considered: Weather Drotected locations: - class A: air-conditioned locations; - class 6: heated and/or cooled enclosed locations; - class C: sheltered locations. Non-weatherDrotected locations: - class D: outdoor locations. 3.2.1 Air-conditioned locations (class A)
32、 For air-conditioned locations (class A), both air temperature and humidity are controlled within specified limits. These locations are frequently provided for control centres and other electronic equipment requiring a controlled climatic environment. 3.2.2 Heated andor cooled enclosed locations (cl
33、ass B) for heated and/or cooled enclosed locations (class B), only air temperature is controlled within specified limits. Equipment rooms are generally in this class. Storage of equipment is frequently in a heated - andor cooled enclosed location. Heating and cooling are not generally available duri
34、ng = transportation. Enclosed means of transportation are normally considered “as sheltered locations“ (class C). = 3.2.3 Sheltered locations (class C) For sheltered locations (class C), neither air temperature nor humidity are controlled; the equipment is only protected against direct solar radiati
35、on, rainfall, other precipitations and wind. E - _. - I - * * rn In the 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 conditions; high temperatures may be consider
36、ably greater than those of outdoor atmospheric conditions (due to solar radiation action on the shelter and heat generated by the equipment). Occasional condensation due to rapid temperature changes can occur; in addition, since the shelter may not be completely sealed, equipment in these locations
37、can be subjected to wind- driven precipitation, dripping water, water spray and dust. Typical sheltered locations are kiosks for operating instruments, unheated warehouses for storage and hard-top transport vehicles. It may be noted that in some types of warehouses (and occasionally in other shelter
38、ed locations), humidity may give rise to condensation on stored equipment. Remote terminal units, transmitters and receivers are often installed in sheltered locations. - Page 8 EN 60870-2-2 : 1996 3.2.4 Outdoor locations (class O) For outdoor locations (class D), neither air temperature nor humidit
39、y are controlled and the equipment is exposed to natural atmospheric conditions such as direct solar radiation, wind, rain, hail, sleet, snow, frost, ice and dust. Equipment may be subject to occasional condensation due to rapid temperature changes. Of particular importance is the temperature gradie
40、nt between sunny and shaded areas of exposed equipment (for instance, apparatus which has been exposed to direct sunlight may suddenly be subjected to rainfall). Remote terminal units, transmitters and receivers are occasionally installed in outdoor locations. Some locations for transportation (e.g.
41、 open decks of ships, non-pressured planes) can also be included in class D. 3.3 Classes of climatic parameters The following recommendations apply to the parameters given in tables 1 and 2 for the various climatic classes. 3.3.1 Temperature, humidity, solar radiation, condensation, wind, rain, snow
42、, frost, ice Air temperature shall be considered 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. Simila
43、r considerations apply to humidity measurement. When much equipment is 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 equipment. The m
44、anufacturer should specify the amount of heat generated by the equipment, so that adequate measures can be taken to dissipate this heat. Solar radiation is specified for all locations; however, for classes A and B this consideration can be limited to equipment located near windows. The occurrence of
45、 condensation, wind-driven precipitation and formation of ice is also specified. 3.3.2 Air pressure Some variation of air pressure can result from weather conditions; major variations are, in general, the result of altitude. Artificial pressurization may increase environmental pressure in certain lo
46、cations. STD-BSI BS EN b0870-2-2-ENGL 1797 m Lb2LibbS Ob00000 LiL5 m Page 9 EN 60870-2-2 1996 For operating conditions only one range of air pressure is specified, independent of the location class, in accordance with IEC 721 -3-3 and IEC 721 -3-4: low air pressure: 70 kPa; high air pressure: 106 kP
47、a. The low value corresponds to an altitude of 3 O00 m; air pressures other than those specified is a matter of negotiation between user and supplier (e.g. transportation by plane). The climatogram in annex A is based on the standard atmospheric pressure of 1 01,3 kPa. * * m Page 10 EN 60870-2-2 : 1
48、996 Table 1 - Classification of climatic conditions for storage (1 K) and use (3K and 4K.) Environmental Class parameters I) For special classes Ax, Bx, Cx, Dx, it is recommended to choose values from the IEC 721 series. the relationship between air temperature and humidity. 1 Averaged over a period
49、 of time of 5 min. I) The value of 70 kPa represents a limit value for open air use, normally at about 3 O00 m altitude. For iigher altitude locations, a lower value must be considered. This parameter is classified in the IEC 721 series as Special climatic conditions; if applicable, refer to the above-mentioned publications. The low and high relative humidities are limited by the low and high absolute humidities; see annex A for STD-BSI BS EN b0870-2-2-ENGL 1997 Lb29bbS b00002 298 Page 11 EN 60870-2-2 : 1996 fable 2 - Classhation of clmatc condi
