1、BRITISH STANDARD BS EN 50306-2:2002 Railway applications Railway rolling stock cables having special fire performance Thin wall Part 2: Single core cables The European Standard EN 50306-2:2002 has the status of a British Standard ICS 13.220.40; 45.060.01 BS EN 50306-2:2002 This British Standard, hav
2、ing been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 13 November 2002 BSI 13 November 2002 ISBN 0 580 40742 X National foreword This British Standard is the official Eng
3、lish language version of EN 50306-2:2002. The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electrical cables, to Subcommittee GEL/20/12, Railway cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on re
4、quest to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI
5、 Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirer
6、s to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This documen
7、t comprises a front cover, an inside front cover, the EN title page, pages 2 to 16, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 503
8、06-2 NORME EUROPENNE EUROPISCHE NORM October 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of e
9、xploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50306-2:2002 E ICS 13.220.40; 45.060.01 English version Railway applications - Railway rolling stock cables having special fire performance - Thin wall Part 2: Single core cables Applications ferroviaires -
10、Cbles pour matriel roulant ferroviaire ayant des performances particulires de comportement au feu - Isolation mince Partie 2: Cbles monoconducteurs Bahnanwendungen - Kabel und Leitungen fr Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken Teil 2: Einadrige Kabe
11、l und Leitungen This European Standard was approved by CENELEC on 2002-06-01. 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 standard without any alteration. Up-to-date lists and
12、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 other language made by translation under the responsi
13、bility 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Irelan
14、d, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.EN 50306-2:2002 - 2 - Foreword This European Standard was prepared by Working Group 12, Railway cables, of Technical Committee CENELEC TC 20, Electric cables, as part of the overall pr
15、ogramme of work in CENELEC TC 9X, Electrical and electronic applications for railways. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50306-2 on 2002-06-01. The following dates were fixed: - latest date by which the EN has to be implemented a
16、t national level by publication of an identical national standard or by endorsement (dop) 2003-07-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-07-01 Annexes designated “informative” are given for information only. In this standard, annexes
17、A and B are informative. _- 3 - EN 50306-2:2002 Contents Introduction 4 1 Scope 4 2 Normative references.5 3 Single core cables .6 4 Tests8 Annex A (informative) Guidance on selection of cables for type approval 16 Annex B (informative) Bibliography 16 Table 1 - Requirements for construction 8 Table
18、 2 - Test requirements .10 Table 3 - Pliability test requirements.13 Table 4 - Schedule of tests.15EN 50306-2:2002 - 4 - Introduction EN 50306 covers a range of sheathed and unsheathed cables with thin wall thickness insulation, based on halogen-free materials, for use in railway rolling stock. It i
19、s divided into four parts: Part 1: General requirements; Part 2: Single core cables; Part 3: Single core and multicore cables (pairs, triples and quads) screened and thin wall sheathed; Part 4: Multicore and multipair cables standard wall sheathed. Special test methods referred to in EN 50306 are gi
20、ven in EN 50305. A guide to use is given in EN 50355 1) . The cables in EN 50306-2 are also required in other parts of this series of standards to build up cables with additional screening and sheathing and also in multicore and multipair combinations. EN 50306-1, General requirements, contains a mo
21、re extensive introduction to EN 50306 and should be read in conjunction with this European Standard. 1 Scope EN 50306-2 specifies requirements for, and constructions and dimensions of, single core cables, rated 300 V to earth, of the following type: Unscreened (0,5 mm 2to 2,5 mm 2single core) All ca
22、bles have stranded tinned copper conductors and thin wall thickness, halogen-free insulation. They are for use in railway rolling stock as fixed wiring, or wiring where limited flexing in operation is encountered. The requirements provide for a continuous operational life at 105 C, and a maximum tem
23、perature for short-circuit conditions of 160 C based on a duration of 5 seconds. NOTE 1 Where these single core cables are used as components of sheathed cables, the temperature for continuous operational life depends upon the type of sheath system used. Sheath systems for either 90 C for 105 C are
24、defined in other parts of EN 50306. Under fire conditions the cables exhibit special performance characteristics in respect of maximum permissible flame propagation (flame spread) and maximum permissible emission of smoke and toxic gases. These requirements are specified to permit the cables to sati
25、sfy Hazard Levels 2, 3 or 4 of EN 45545-1 1) . NOTE 2 Requirements for the emission of smoke and gases are not specified for cables used for Hazard Level 1 of EN 45545-1. NOTE 3 EN 45545-1 is still under development and should be consulted. EN 50306-2 should be used in conjunction with EN 50306-1, G
26、eneral requirements.1)At draft stage.- 5 - EN 50306-2:2002 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafte
27、r. For dated references, subsequent amendments to or revisions of these references apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 10002-1 Tensile testin
28、g of metallic materials - Part 1: Test at ambient temperature EN 45545-1 2) Railway applications - Fire protection on railway vehicles Part 1: General EN 50265-2-1 Common test methods for cables under fire conditions - Test for resistance to vertical flame propagation for a single insulated conducto
29、r or cable - Part 2-1: Procedures - 1 kW pre-mixed flame EN 50267-2-1 Common test methods for cables under fire conditions - Tests on gases evolved during combustion of materials from cables Part 2-1: Procedures - Determination of the amount of halogen acid gas EN 50267-2-2 Common test methods for c
30、ables under fire conditions - Tests on gases evolved during combustion of materials from cables Part 2-2: Procedures - Determination of degree of acidity of gases for materials by measuring pH and conductivity EN 50268-2 Common test methods for cables under fire conditions - Measurement of smoke den
31、sity of cables burning under defined conditions Part 2: Procedure EN 50305 Railway applications - Railway rolling stock cables having special fire performance - Test methods EN 50306-1 Railway applications-Railway rolling stock cables having special fire performance - Thin wall - Part 1: General req
32、uirements EN 50334 Marking by inscription for the identification of cores of electric cables EN 60684-2 Flexible insulating sleeving - Part 2: Methods of test (IEC 60684-2) EN 60811-1-4 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-4: General applic
33、ation - Tests at low temperature (IEC 60811-1-4) EN 60811-2-1 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 2-1: Method specific to elastomeric compounds - Ozone resistance, hot set and mineral oil immersion tests (IEC 60811-2-1)2)At draft stage.EN 50
34、306-2:2002 - 6 - 3 Single core cables 3.1 General The cables shall conform to the applicable general requirements given in EN 50306-1 and to the specific requirements of this Part 2. Conformity with the requirements shall be checked by inspection and by the tests given in Table 4. 3.2 Designation, m
35、arking and coding 3.2.1 Code designation For the purpose of supplying cables to this standard, the following code designation shall be used: - EN reference; - number of cores and conductor size; - identifier for the particular Hazard Level (see 3.2.2). For example: EN 50306-2 1x1,5 M 3.2.2 Code iden
36、tities for cables suitable for use in particular hazard levels The following letters shall be used as a code to identify the suitability of a particular cable for use under one of the Hazard Levels of EN 45545-1, and to indicate performance levels relating to low temperature and to oil and fuel resi
37、stance: Hazard Level EN 45545-1 1 2 or 3 4 - low temperature / oil resistance A B C - extra low temperature / oil resistance D E F - low temperature / extra oil and fuel resistance G H J - extra low temperature / extra oil and fuel resistance K L M 3.2.3 Marking of cable Cables shall be marked with
38、the following: - manufacturers name; - EN reference; - voltage rating; - number of cores and conductor size; - identifier for the particular Hazard Level (see 3.2.2). For example: XYZ EN 50306-2 300 V 1x1,5 M The marking shall conform to the requirements of clause 5 of EN 50306-1.- 7 - EN 50306-2:20
39、02 3.3 Core identification 3.3.1 Single core cables The colour of the cores shall be white unless otherwise specified in the particular sections. The colour shall be clearly identifiable and durable. Durability shall be checked by the test given in 10.1 of EN 50305. Conformity with these requirement
40、s shall be verified by visual examination. 3.3.2 Multicore/multipair cables Cores complying with EN 50306-2 are used as components of multicore and multipair cables, e.g. in EN 50306-3 or EN 50306-4. In such cases the identification of the individual core in a cable or a pair shall be by numbers. Th
41、e numbers shall be printed in a colour which contrasts with the core colour. The numbers on individual cores shall be spaced at a maximum of 25 mm apart. The marking by numbers shall conform to EN 50334, unless otherwise specified, and conformity shall be checked by visual examination and measuremen
42、t. 3.4 Rated voltage The rated voltage recognised for the purposes of this standard shall be 300 V to earth. NOTE See EN 50355 for further information. 3.5 Construction 3.5.1 Conductor The conductor shall conform to the requirements given in Table 1. The wires shall be tin coated annealed copper. Wh
43、en tested in accordance with EN 10002-1 the minimum elongation of conductors shall be 10 %. 3.5.2 Insulation system The insulation system shall be manufactured from material as defined in 3.1 of EN 50306-1 and shall meet the requirements of clause 4 of this Part 2. The insulation shall be applied by
44、 extrusion. The insulation thickness shall conform to the specified value given in Table 1.EN 50306-2:2002 - 8 - Table 1 - Requirements for construction 123456 Conductor Number Diameter Minimum Overall diameter Max. nominal x mm thickness resistance cross- nominal of of section diameter insulation c
45、onductor of wire mm at 20 C mm mm min. max. mm min. max. /km 0,5 19 x 0,18 0,80 0,95 0,18 1,15 1,45 40,1 0,75 37 x 0,16 a 1,00 1,15 0,18 1,35 1,65 26,7 1,0 37 x 0,18 a 1,10 1,30 0,18 1,45 1,80 20,0 1,5 37 x 0,23 a 1,45 1,65 0,22 1,95 2,30 13,7 2,5 37 x 0,30 a 1,85 2,15 0,28 2,50 2,85 8,21 aThese cab
46、les may be supplied in 19 strand conductors providing all product performance requirements in the specification are met. 4 Tests 4.1 Definitions relating to tests The definition of Type (T), Sample (S) and Routine (R) tests is as given in clause 3 of EN 50306-1. NOTE 1 Tests classified as Sample (S)
47、 or Routine (R) may be required as part of any approval schemes. NOTE 2 Annex B gives guidance on the selection of cables for type approval. 4.2 Voltage test The test shall be carried out in accordance with 6.2.1 of EN 50305, using either an a.c. or d.c. voltage and the following conditions: - sampl
48、e length 20 m - voltage (a.c.) 2 kV - voltage (d.c.) 4,8 kV - duration of application 5 min - test temperature (20 5) C At the conclusion of the test there shall be no breakdown of the insulation. 4.3 Insulation resistance The test shall be carried out at 20 C and at 90 C in accordance with 6.4.1 an
49、d 6.4.2 of EN 50305. The values obtained shall not be below those given in columns 2 and 3 of Table 2.- 9 - EN 50306-2:2002 4.4 Dielectric strength The test shall be carried out in accordance with 6.8 of EN 50305, using the following conditions: - water temperature (20 5) C - immersion duration 1 h - minimum breakdown voltage (a.c.) 4 kV At the conclusion of the test there shall be no breakdown below the minimum voltage. 4.5 Spark test The test shall be carried out in acc
