1、BRITISH STANDARD BS EN 50306-4:2002 Railway applications Railway rolling stock cables having special fire performance Thin wall Part 4: Multicore and multipair cables standard wall sheathed The European Standard EN 50306-4:2002 has the status of a British Standard ICS 13.220.40; 45.060.01 BS EN 5030
2、6-4:2002 This British Standard, having 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 40744 6 National foreword This B
3、ritish Standard is the official English language version of EN 50306-4:2002. 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
4、 subcommittee can be obtained on request 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 usi
5、ng the “Search” facility of the BSI 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 f
6、rom legal obligations. aid enquirers 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 th
7、e UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 26, 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. Da
8、te CommentsEUROPEAN STANDARD EN 50306-4 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 Brus
9、sels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50306-4:2002 E ICS 13.220.40; 45.060.01 English version Railway applications - Railway rolling stock cables having special fire performance - Thin wall Part 4: Multicore an
10、d multipair cables standard wall sheathed Applications ferroviaires - Cbles pour matriel roulant ferroviaire ayant des performances particulires de comportement au feu - Isolation mince Partie 4: Cbles multiconducteurs et multipaires avec gaine dpaisseur normale Bahnanwendungen - Kabel und Leitungen
11、 fr Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken Teil 4: Mehradrige und mehrpaarige Leitungen mit Standardmantelwanddicken This European Standard was approved by CENELEC on 2002-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regul
12、ations which stipulate the conditions for giving this European Standard the status of a national 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. Thi
13、s European Standard exists in three official versions (English, French, German). A version 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 member
14、s 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, Spain, Sweden, Switzerland and United Kingdom.EN 50306-4:2002 - 2 - Foreword Th
15、is European Standard was prepared by Working Group 12, Railway cables, of Technical Committee CENELEC TC 20, Electric cables, as part of the overall programme of work in CENELEC TC 9X, Electrical and electronic applications for railways. The text of the draft was submitted to the Unique Acceptance P
16、rocedure and was approved by CENELEC as EN 50306-4 on 2002-06-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2003-07-01 - latest date by which the national standards co
17、nflicting with the EN have to be withdrawn (dow) 2008-07-01 Annexes designated “informative” are given for information only. In this standard, annexes A and B are informative. _- 3 - EN 50306-4:2002 Contents Introduction. 4 1 Scope 4 2 Normative references 5 3 Multicore cables - sheathed 6 4 Tests 9
18、 5 Multicore cables - screened and sheathed 14 6 Tests 17 7 Multipair cables - individually screened and sheathed and with an overall sheath 22 8 Tests 24 Annex A (informative) Guidance on selection of cables for type approval . 26 Annex B (informative) Bibliography 26 Table 1 - Requirements for con
19、struction of multicore cables - sheathed . 8 Table 2 - Schedule of tests for multicore cables - sheathed 13 Table 3 - Requirements for the construction of multicore cables - screened and sheathed 16 Table 4 - Schedule of tests for multicore cables - screened and sheathed 21 Table 5 - Requirements fo
20、r the construction of multipair cables - individually screened and sheathed and with an overall sheath .24 Table 6 - Schedule of tests for multipair cables - individually screened and sheathed and with an overall sheath 25EN 50306-4:2002 - 4 - Introduction EN 50306 covers a range of sheathed and uns
21、heathed cables with thin wall thickness insulation, based on halogen free materials, for use in railway rolling stock. It is 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
22、sheathed; Part 4: Multicore and multipair cables, standard wall sheathed. Special test methods referred to in EN 50306 are given in EN 50305. A Guide to Use is given in EN 50355 1) . EN 50306-1, General requirements, contains a more extensive introduction to EN 50306, and should be read in conjuncti
23、on with this European Standard. 1 Scope EN 50306-4 specifies requirements for, and constructions and dimensions of, multicore and multipair cables rated 300 V to earth, of the following types: - unscreened, sheathed for either exposed or protected wiring (0,5 mm 2to 2,5 mm 2 , number of cores from 2
24、 to 48); - screened, sheathed for either exposed or protected wiring (0,5 mm 2to 2,5 mm 2 , number of cores from 2 to 8); - screened, sheathed for either exposed or protected wiring (0,5 mm 2to 1,5 mm 2 , number of pairs of cores from 2 to 7). NOTE 1 Not all conductor sizes/number of cores are speci
25、fied for every type. All cables have stranded tinned copper conductors, halogen-free, thin wall thickness insulation and standard wall thickness sheath. Cable types are specified for use in exposed situations (Class E), and for protected situations (Class P). They are for use in railway rolling stoc
26、k as fixed wiring, or wiring where limited flexing in operation is encountered. The requirements provide for a continuous operational life at temperatures of 90 C or 105 C dependent upon the sheath system type. NOTE 2 In EN 50306-4 the higher temperature rating of 105 C is only allowed where sheath
27、type S2 is used, and where it has been specifically tested for the higher rating (i.e. by long-term thermal endurance testing to demonstrate a lifetime of at least 20 000 h at 125 C). The maximum temperature for short-circuit conditions of 160 C is based on a duration of 5 s. The cables specified in
28、 EN 50306-4 which have a sheath of type EM 101, EM 103 or S2 material are suitable for operation at temperatures as low as 25 C and those with sheath of type EM 102 or EM 104 material are suitable for operation at temperatures as low as - 40 C. NOTE 3 Where fuel oil is present sheath types EM 101 an
29、d EM 102 are not suitable. NOTE 4 S2 material may also be suitable for operational temperatures as low as 40 C, but if so must be tested accordingly to confirm this.1) At draft stage.- 5 - EN 50306-4:2002 Under fire conditions the cables exhibit special performance characteristics in respect of maxi
30、mum permissible flame propagation (flame spread) and maximum permissible emission of smoke and toxic gases. These requirements are specified to permit the cables to satisfy Hazard Levels 2, 3 or 4 of EN 45545-1 2) . NOTE 5 Requirements for the emission of smoke and gases are not specified for cables
31、 used for Hazard Level 1 of EN 45545-1. NOTE 6 EN 45545-1 is still under development and should be consulted. EN 50306-4 should be used in conjunction with EN 50306-1, General requirements, EN 50306-2, Single core cables, and EN 50306-3, Single core and multicore cables. 2 Normative references This
32、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 hereafter. For dated references, subsequent amendments to or revisions of any of these publicat
33、ions 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 45545-1 2) Railway applications - Fire protection of railway vehicles Part 1: General EN 50265-2-1 C
34、ommon test methods for cables under fire conditions - Test for resistance to vertical flame propagation for a single insulated conductor 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
35、 of materials from cables Part 2-1: Procedures - Determination of the amount of halogen acid gas EN 50267-2-2 Common test methods for cables under fire conditions - Tests on gases evolved during combustion of materials from cables Part 2-2: Procedures - Determination of degree of acidity of gases fo
36、r materials by measuring pH and conductivity EN 50268-2 Common test methods for cables under fire conditions - Measurement of smoke density of cables burning under defined conditions Part 2: Procedure EN 50305 Railway applications - Railway rolling stock cables having special fire performance - Test
37、 methods EN 50306-1 Railway applications-Railway rolling stock cables having special fire performance - Thin wall - Part 1: General requirements EN 50306-2 Railway applications-Railway rolling stock cables having special fire performance - Thin wall - Part 2: Single core cables EN 60684-2 Flexible i
38、nsulating sleeving - Part 2: Methods of test EN 60811-1-1 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-1: General application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties (IEC 60811-1-1)2) At d
39、raft stage.EN 50306-4:2002 - 6 - EN 60811-1-3 Insulating and sheathing materials of electric and optical cables - Common test methods - Part 1-3: General application - Methods for determining the density - Water absorption tests - Shrinkage test (IEC 60811-1-3) EN 60811-1-4 Insulating and sheathing
40、materials of electric and optical cables - Common test methods - Part 1-4: General application - Test 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: Methods specific to elastomeric compounds - Ozone
41、resistance, hot set and mineral oil immersion tests (IEC 60811-2-1) 3 Multicore cables - sheathed 3.1 General The completed cables shall conform to the applicable general requirements given in EN 50306-1 and to the specific requirements of clause 3 and clause 4. Conformity with the requirements shal
42、l be checked by inspection and by the tests given in Table 2. 3.2 Designation, marking and coding 3.2.1 Code designation For the purpose of supplying cables to this clause of the standard, the following code designation shall be used: - EN reference; - table number; - cable class (P or E); - number
43、of cores and conductor size; - identifier for the particular Hazard Level (see 3.2.2); - temperature rating. For example: EN 50306-4 1P 4x2,5 CC 90 3.2.2 Code identities for cables suitable for use in particular hazard levels The following letters shall be used as a code to identify the suitability
44、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 resistance: NOTE For sheathed cables two letters are required, one for the insulation and one for the sheath.- 7 - EN 50306-4:2002 Hazard Lev
45、el 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 on the insulation of cores The cores shall be marked 1,
46、 2, etc., in accordance with the requirements given in 3.3.2 of EN 50306-2. However, the core number one may be marked as the relevant single core in accordance with the requirements of 3.3.1 of EN 50306-2. 3.2.4 Marking of the cable The cables shall be marked with the following: - manufacturers nam
47、e; - EN reference; - table number ; - cable class (P or E); - voltage rating; - number of cores and conductor size; - identifier for the particular Hazard Level (see 3.2.2); - temperature rating. For example: XYZ EN 50306-4 1P 300 V 4x2,5 CC 90 The marking shall conform to the requirements of clause
48、 5 of EN 50306-1. 3.3 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. 3.4 Construction 3.4.1 Cores Each insulated single core shall conform to the requirements given in EN 50306-2. 3.4.2 Laying-up of cor
49、es The cores shall be twisted together. The pitch of lay for the cores shall not be greater than 20 times the diameter of the laid up cores in the cable.EN 50306-4:2002 - 8 - 3.4.3 Sheath The sheath shall be either a compound of type S2, or a compound of type EM 101 to EM 104, and shall be applied by extrusion. Compounds type EM 101 to EM 104 together with their requirements are defined in EN 50264-1. The sheath shall be smooth and uniformly applied; the application shall ens
