1、BRITISH STANDARDBS EN 50125-2:2002Railway applications Environmental conditions for equipment Part 2: Fixed electrical installationsICS 29.280g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g
2、60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Incorporating corrigendum June 2010National forewordThis British Standard is the UK implementation of EN 50125-2:2002, incorporating corrigendum June 2010.The UK participation in its preparation was entrusted to Technical Committee GEL/9, Railway electrotech
3、nical applications, to Subcommittee GEL/9/3, Fixed equipment.A list of organizations represented on this subcommittee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct applicatio
4、n.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 50125-2:2002This British Standard waspublished under the authorityof the Standards Policy andStrategy Committee on19 March 2003 BSI 2010Amendments/corrigenda issued since publicationDate Comments 31 August 2010
5、Implementation of CENELEC corrigendum June 2010; Text added to Foreword and Annex ZZ insertedISBN 978 0 580 71999 8EUROPEAN STANDARD EN 50125-2NORME EUROPENNEEUROPISCHE NORM December 2002CENELECEuropean Committee for Electrotechnical StandardizationComit Europen de Normalisation ElectrotechniqueEuro
6、pisches Komitee fr Elektrotechnische NormungCentral Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.Ref. No. EN 50125-2:2002 EICS 29.280English versionRailway applications -Environmental
7、conditions for equipmentPart 2: Fixed electrical installationsApplications ferroviaires -Conditions denvironnementpour le matrielPartie 2: Installations lectriques fixesBahnanwendungen -Umweltbedingungen fr BetriebsmittelTeil 2: Ortsfeste elektrische AnlagenThis European Standard was approved by CEN
8、ELEC on 2002-07-01. CENELEC members are bound tocomply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards
9、 may be obtained onapplication to the Central Secretariat or to any CENELEC member.This European Standard exists in three official versions (English, French, German). A version in any otherlanguage made by translation under the responsibility of a CENELEC member into its own language andnotified to
10、the Central Secretariat has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,Netherlands, Norway, Portugal, Slovakia
11、, Spain, Sweden, Switzerland and United Kingdom.Incorporating corrigendum June 2010- 2 -ForewordThis European Standard was prepared by SC 9XC, Electric supply and earthing systems forpublic transport equipment and ancillary apparatus (fixed installations), of Technical CommitteeCENELEC TC 9X, Electr
12、ical and electronic applications for railways.The text of the draft was submitted to the formal vote and was approved by CENELEC asEN 50125-2 on 2002-07-01.The following dates were fixed:- latest date by which the EN has to be implementedat national level by publication of an identicalnational stand
13、ard or by endorsement (dop) 2003-07-01- latest date by which the national standards conflictingwith the EN have to be withdrawn (dow) 2005-07-01Annexes designated “informative“ are given for information only.In this standard, Annex A is informative._This document has been prepared under a mandate gi
14、ven to CENELEC by the European Commission and supports the Directive 2008/57/EC. BS EN 50125-2:2002EN 50125-2:2002 (E)_- 3 -ContentsPage1 Scope .42 Normative references43 Definitions.54 Environmental conditions64.1 General .64.2 Altitude 64.3 Air temperature and humidity.74.4 Air movement 84.5 Rain.
15、104.6 Hail104.7 Snow and ice.104.8 Solar radiation .104.9 Vibration and shocks .114.10 Pollution.114.11 Lightning124.12 Electromagnetic compatibility 124.13 Fire protection .124.14 Environmental conditions in tunnels.12Annex A (informative) Conditions relating to tunnels 13Bibliography .16Figure 1 -
16、 Ratio of reference wind velocity corresponding to a yearly probability pto wind velocity with a probability of 0,029Table 1 - Altitude relative to sea level7Table 2 - Reference wind velocities (Vref,0,0,2).9Table 3 - Wind velocities .10Table 4 - Ice loads 10Table 5 - Solar radiation11Table 6 - Poll
17、ution type .12BS EN 50125-2:2002EN 50125-2:2002 (E)Annex ZZ (informative) Coverage of Essential Requirements of EC Directives .15- 4 -1 ScopeThis European Standard takes into account environmental conditions within Europe.This European Standard deals with the environmental influences on fixed electr
18、ical installationsfor traction power supply and equipment essential to operate a railway- in open air;- in covered areas;- in tunnels;- within enclosures placed in above areas.Escalators, lifts, fire protection, lighting in tunnels and on platforms, ticket machines, ventilationsystems and non-essent
19、ial functions are not included.Such influences include altitude, temperature and humidity, air movement, rain, snow, hail, ice,sand, solar radiation, lightning, pollution, vibration, shocks and EMC.This standard does not specify the test requirements for equipment.In case of environmental conditions
20、 not covered by the standard the data to be adopted for aspecific project should be clearly stipulated when preparing a specification.This standard is not intended to apply to cranes, installations in underground mines, suspendedcable cars and funicular railways.Nuclear radiation is excluded.Signall
21、ing and telecommunications systems are not considered in this standard.Fixed installed signalling and telecommunication equipment shall comply with EN 50125-3.2 Normative referencesThis European Standard incorporates by dated or undated references, provisions from otherpublications. These normative
22、references are cited at the appropriate place in the text and thepublications are listed hereafter. For dated references, subsequent amendments to or revisionsof any of these publications apply to this European Standard only when incorporated in it byamendment or revision. For undated references the
23、 last edition of the publication referred toapplies (including amendments).EN 50121-5 Railway applications Electromagnetic compatibilityPart 5: Emission and immunity of fixed power supply installations andapparatusEN 50124-1 Railway applications - Insulation coordinationPart 1: Basic requirements -
24、Clearances and creepage distances for allelectrical and electronic equipmentEN 50124-2 Railway applications - Insulation coordinationPart 2: Overvoltages and related protectionBS EN 50125-2:2002EN 50125-2:2002 (E)- 5 -EN 50125-3 Railway applications Environmental conditions for equipmentPart 3: Equi
25、pment for signalling and telecommunicationsEN 60529 Degrees of protection provided by enclosures (IP code)(IEC 60529)EN 60721-3-3 Classification of environmental conditionsPart 3: Classification of groups of environmental parameters and theirseverities Section 3: Stationary use at weatherprotected l
26、ocations(IEC 60721-3-3)EN 60721-3-4 Classification of environmental conditionsPart 3: Classification of groups of environmental parameters and theirseverities Section 4: Stationary use at non-weatherprotected locations(IEC 60721-3-4)ENV 1991-2-4 Eurocode 1: Basis of design and actions on structures
27、Part 2-4:Actions on structures Wind actionsHD 478.2.1 Classification of environmental conditionsPart 2: Environmental conditions appearing in nature - Temperature andhumidity (IEC 60721-2-1)HD 478.2.2 Classification of environmental conditionsPart 2: Environmental conditions appearing in nature - Pr
28、ecipitation andwind (IEC 60721-2-2)HD 478.2.3 Classification of environmental conditionsPart 2: Environmental conditions appearing in nature - Air pressure(IEC 60721-2-3)3 DefinitionsFor the purpose of this standard the following definitions apply.3.1covered areaprotected from precipitation, but ope
29、n to the effects of humidity and windNOTE 1 Some constructions may be affected by solar radiation.NOTE 2 Tunnels are excluded from this definition.3.2cubicleclosed space where the direct open air influences are excluded3.3environmentthe surrounding objects, region or circumstances which may influenc
30、e the behaviour of thesystem and/or may be influenced by the systemBS EN 50125-2:2002EN 50125-2:2002 (E)- 6 -3.4environmental conditionsconditions which are brought about because of the environment3.5environmental protectionprovisions to avoid the interaction of the system with the environment3.6ope
31、n airnot protected from direct environmental influences3.7tunnelartificial underground passage through a hill or below the normal ground level or under sea level4 Environmental conditions4.1 GeneralThe purchaser shall specify clearly in his specification the class to consider. Otherwise the classmen
32、tioned in the product standard shall apply where available. Where no other specificationsare specified, the normal requirements in this standard shall be used. Installations shallfunction, or be capable of functioning, under all specified conditions.The environmental conditions are considered for no
33、rmal operation. More severe conditions maybe specified for the equipment to withstand, when not operating, without suffering damage. Anexample of such a condition is wind velocity high enough to cause dewirements but not tearingdown the overhead contact line.Microclimates surrounding components may
34、need special requirements which are covered byproduct standards.Special conditions are classified with a suffix X.The severities specified are those which have a low probability of being exceeded. All specifiedvalues are either maximum or minimum limits. These values can be reached, but do not occur
35、permanently. Depending on the situation there are different frequencies of occurrence related toa certain period of time. Such frequencies of occurrence have not been included in thisstandard, but should be considered for any environmental parameter, if relevant. In this casethey shall be specified.
36、4.2 AltitudeAltitude related to sea level is relevant for air pressure. Air pressure shall be considered inaccordance with HD 478.2.3.The different classes of altitude above sea level in open air at which the equipment shallperform as specified are given in Table 1.BS EN 50125-2:2002EN 50125-2:2002
37、(E)- 7 -Table 1 - Altitude relative to sea levelClass Altitude range relative tosea levelmA 1 up to 1 400A 2 up to 1 000A X above 1 400NOTE In class A 2 installations under sea level are included.Using A X class, the maximum altitude shall be specified by the purchaser.4.3 Air temperature and humidi
38、ty4.3.1 GeneralFor air temperature and humidity in open air, the climates according to Table 2 of HD 478.2.1shall be used, excluding the first and the last two climates.These values are illustrated in Figure 2 to Figure 7 of HD 478.2.1.For weather-protected areas, information is given in EN 60721-3-
39、3.Different values depending on national requirements are possible. These values are to beagreed separately between purchaser and supplier, as appropriate to the local conditions.In principle, air temperatures are measured in the shade.The values of humidity can be 100 %.4.3.2 Special conditionsWhen
40、 considering the temperature of an object, the effects of thermal radiation from the ground,or due to the proximity of other large objects, has to be taken into account.In open airThe temperatures in railway surroundings, e.g. during summer on large expanses of ballastsuch as are to be found in larg
41、e stations, can be higher than outside the area itself.In covered areasMaximum temperatures in covered areas should be not less than those specified for open air.Special attention should be given to installations under transparent roofs which are subject tosolar radiation. Conditions depend on the c
42、over material.In cubiclesDepending on the cubicle, the maximum ambient temperature should be specified up to 30 Khigher than those specified in open air .BS EN 50125-2:2002EN 50125-2:2002 (E)- 8 -Temperatures inside a cubicle shall be measured in free space away from the vicinity of theheat emitting
43、 elements. Cubicles in covered areas or with other screening above should havemodified values. Temperature and humidity in cubicles are a function of the design of theenclosure and will depend on the ventilation arrangements.If the equipment is to be installed in a controlled climatic environment an
44、d is required to operateonly under these conditions, the temperature range shall be agreed between purchaser andsupplier.The effect of condensation and also temperature changes and extremes of temperature shallnot lead to any malfunction or failure.4.4 Air movementCalculations of air movement and ai
45、r pressure as used in special national standards.4.4.1 WindWind velocity is defined in metres per second (m/s) and should be referred either- to a height of 10 m above ground, or- to a height of 500 m above ground (gradient velocity).The averaging period is 10 min and the reference values have a yea
46、rly probability of occurrenceof 0,02 (equivalent to a return period of 50 years). For other probabilities the correspondingwind velocities can be taken from Figure 1 of ENV 1991-2-4.Wind action on structures is greatly influenced by details of the local landscape, tall buildingsand height above the
47、ground. The greater the roughness of the ground surface, the more thewind action close to this surface is reduced; thus there may be considerable differencesbetween wind near the ground surface and that at greater heights above the ground surface.Wind action depending on the surface is classified in
48、to four categories. Relatively open terrainwith trees and other obstacles is most frequently experienced in Central Europe and isrecommended as the basis for reference wind velocities.Variation of the 10 min mean values with height h can be calculated byg97g247g248g246g231g232g230g611010hhvvwhereg11
49、010wind velocity at 10 m height in m/s,g110hwind velocity at height h in m/s at m,g97 roughness parameter depending on the terrain category which isg97 = 0,28 for town centres,g97 = 0,20 for suburban districts and forest areas,g97 = 0,16 for open terrain with obstacles,g97 = 0,12 for flat land and coast.The wind velocities which shall be taken into account when assessing operational aspects arelisted in Table 2. The Class has to be selected according to the local conditions. The data applyto ”open terrain with obstacles” 10 m above ground.BS E
