1、BRITISH STANDARD BS EN 50306-1:2002 Railway applications Railway rolling stock cables having special fire performance Thin wall Part 1: General requirements The European Standard EN 50306-1:2002 has the status of a British Standard ICS 13.220.40; 45.060.01 BS EN 50306-1:2002 This British Standard, h
2、aving 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 40741 1 National foreword This British Standard is the official E
3、nglish language version of EN 50306-1:2002. 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
4、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 using the “Search” facility of the B
5、SI 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 enquir
6、ers 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 docum
7、ent comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 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 50306-1 NORME EUROPENNE
8、 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 exploitation in any f
9、orm and by any means reserved worldwide for CENELEC members. Ref. No. EN 50306-1:2002 E ICS 13.220.40; 45.060.01 English version Railway applications - Railway rolling stock cables having special fire performance - Thin wall Part 1: General requirements Applications ferroviaires - Cbles pour matriel
10、 roulant ferroviaire ayant des performances particulires de comportement au feu - Isolation mince Partie 1: Prescriptions gnrales Bahnanwendungen - Kabel und Leitungen fr Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken Teil 1: Allgemeine Anforderungen This Eu
11、ropean 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 bibliographical referen
12、ces 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 responsibility of a CENELEC mem
13、ber 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, Ireland, Italy, Luxembourg, M
14、alta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.EN 50306-1:2002 - 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 programme of work in CENE
15、LEC 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 50306-1 on 2002-06-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by pub
16、lication 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 “normative” are part of the body of the standard. Annexes designated “informative” are given fo
17、r information only. In this standard, annex A is normative and annex B is informative. _- 3 - EN 50306-1:2002 Contents Introduction .4 1 Scope5 2 Normative references 5 3 Definitions .6 4 Rated voltage 7 5 Marking .8 6 General requirements for the construction of cables .9 7 Electrical performance.1
18、2 8 Reaction to fire - cables.12 9 Reaction to fire - components13 Annex A (normative) Thickness and overall diameter Selection of samples and calculation of results17 Annex B (informative) Bibliography.19 Figure 1 Example of marking .8 Table 1 Requirements for non-electrical tests for halogen-free
19、sheathing materials.14 Table 2 Requirements for test for fillers, tapes and binders 16EN 50306-1:2002 - 4 - Introduction The railway industry is generally concerned with the movement of people as well as goods. It is therefore essential that a high level of safety is achieved, even when failures occ
20、ur which may involve fire, howsoever caused, affecting railway rolling stock. Hence it is necessary to provide cables for use in railway environments which minimise the hazard to people when a fire may damage the cable, irrespective of whether the fire is caused by an external source or from within
21、the electrical system. EN 50306 specifies cables which, in the event of fire will limit the risk to people and improve the safety on railways in general. It covers cables with thin wall thickness of both insulation and sheath, based on halogen free materials, for use in railway rolling stock. There
22、is provision for screening in some of the parts and also for a standard wall thickness sheath. In the event of a fire affecting cables to EN 50306 they will have a limited flame spread and limited emission of toxic gases. In addition these cables when burnt, produce limited amounts of smoke. This la
23、st characteristic will minimise loss of visibility in the event of a fire and will aid reduced evacuation times. The objects of this standard are - to standardise cables that are safe and reliable when properly used, - to state the characteristics, performance, and construction requirements directly
24、 or indirectly bearing on safety, - to specify methods for checking conformity with these requirements. EN 50306, which covers a range of cables rated at 300 V to earth with conductor sizes 0,5 mm 2up to 2,5 mm 2 , is divided into 4 parts: Part 1: General requirements; Part 2 : Single core cables; P
25、art 3: Single core and multicore cables (pairs, triples and quads) screened and thin wall sheathed; Part 4: Multicore and multipair cables standard wall sheathed. These cables are intended for a limited number of applications. Further information on these applications is given in EN 50355 1) . Speci
26、al test methods referred to in EN 50306 are given in EN 50305. A separate European Standard, EN 50264 covers cables for similar applications up to 3,6 kV/6 kV rating, but with standard wall thickness of both insulation and sheath, and provides for a maximum conductor size of 400 mm 2 .1) At draft st
27、age.- 5 - EN 50306-1:2002 1 Scope EN 50306-1 specifies the general requirements applicable to the cables given EN 50306-2, EN 50306-3 and EN 50306-4. It includes the detailed requirements for S1 and S2 sheathing materials and other components called up in the separate Parts. NOTE 1 Detailed requirem
28、ents for insulation systems are given in EN 50306-2. In particular EN 50306-1 specifies those requirements relating to fire safety which enable the cables to satisfy Hazard Levels 2, 3 or 4 of EN 45545-1 2) . NOTE 2 Requirements for the emission of smoke and gases are not specified for Hazard Level
29、1 of EN 45545-1. NOTE 3 EN 45545-1 is still under development and should be consulted. These cables are rated for occasional thermal stresses causing ageing equivalent to continuous operational life at temperatures of 90 C or 105 C dependent upon the sheath system type. These temperatures are based
30、upon an acceptance test, using long-term thermal endurance ageing at 110 C and 125 C respectively, and extrapolation of data to 20 000 h. The maximum temperature for short circuit conditions is 160 C based on a duration of 5 s. EN 50306-1 should be used in conjunction with one or more of the other p
31、arts of EN 50306. 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 hereafter. For dated references, subsequent amend
32、ments 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 45545-1 2) Railway applications - Fire protection of railway
33、vehicles Part 1: General EN 50264-1 Railway applications - Railway rolling stock cables having special fire performance - Standard wall - Part 1: General requirements EN 50265-2-1 Common test methods for cables under fire conditions - Test for resistance to vertical flame propagation for a single in
34、sulated conductor or cable - Part 2-1: Procedures - 1 kW pre-mixed flame EN 50266-2-4 Common test methods for cables under fire conditions - Test for vertical flame spread of vertically-mounted bunched wires or cables Part 2-4: Procedures - Category C EN 50267-2-1 Common test methods for cables unde
35、r fire conditions - Tests on gases evolved during combustion of materials from cables Part 2-1: Procedures - Determination of the amount of halogen acid gas2) At draft stage.EN 50306-1:2002 - 6 - EN 50267-2-2 Common test methods for cables under fire conditions - Tests on gases evolved during combus
36、tion 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 density of cables burning under defined conditions Part 2: Procedure
37、EN 50305 Railway applications - Railway rolling stock cables having special fire performance - Test methods EN 50306-2 Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 2: Single core cables EN 60811-1-1 Insulating and sheathing materials of elect
38、ric 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) EN 60811-1-2 Insulating and sheathing materials of electric cables - Common test methods - Part 1-2: Genera
39、l application - Thermal ageing methods (IEC 60811-1-2) 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 Ins
40、ulating and sheathing 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 elastomeri
41、c compounds - Ozone resistance, hot set and mineral oil immersion tests (IEC 60811-2-1) EN 60684-2 Flexible insulating sleeving - Part 2 - Methods of test (IEC 60684-2) 3 Definitions For the purpose of all parts of EN 50306 the following definitions apply. 3.1 insulation system insulation - polymers
42、, copolymers or alloys which contain aromatic groups and heteroelements such as N, O or Si in the main chain of the polymer molecules; - polymers, copolymers or alloys of olefinic type, crosslinked if necessary- 7 - EN 50306-1:2002 3.2 sheathing system sheath - type S1 sheath materials are compounds
43、 which contain aromatic groups and heteroelements such as N, O or Si in the main chain of the polymer molecules; - type S2 sheath materials are polymers or copolymers in which the characteristic constituent is a copolymer of ethylene, crosslinked if necessary; - type EM 101, EM 102, EM 103 and EM 10
44、4 sheath materials as given in EN 50264-1 for standard wall sheathed cables NOTE Different performance levels in terms of thermal endurance, fuel resistance and suitability for use at low temperature can be obtained depending on the exact composition used. 3.3 halogen-free material combustible mater
45、ial which, when tested in accordance with the designated method, conforms to the following: - maximum evolution of HCl - 0,5 % to EN 50267-2-1 - minimum pH - 4,3 to EN 50267-2-2 - maximum conductivity - 10,0 S/mm to EN 50267-2-2 NOTE This value of “maximum conductivity” is subject to further conside
46、ration and review. - maximum fluorine content - 0,1 % to EN 60684-2 3.4 type tests (symbol T) tests required to be made before supplying a type of cable covered by this standard on a general commercial basis in order to demonstrate satisfactory performance characteristics to meet the intended applic
47、ation. These tests are of such a nature that, after they have been made, they need not be repeated unless changes are made in the cable materials, design or type of manufacturing process which might change the performance characteristics 3.5 sample tests (symbol S) tests made on samples of completed
48、 cable, or components taken from a completed cable adequate to verify that the finished product meets the design specification 3.6 routine tests (symbol R) tests made on all complete cable lengths to demonstrate their integrity 4 Rated voltage The rated voltage recognized for the purposes of EN 5030
49、6 shall be 300 V to earth. NOTE See EN 50355 for further information.EN 50306-1:2002 - 8 - 5 Marking 5.1 Indication of origin Cables shall be provided with an indication of origin consisting of the continuous marking of the manufacturers name, trademark, or registered identification number by one of the following methods: 1) printing on the insulation of at least one core; 2) printing, indenting or embossing on the outer surface of sheathed cable; 3) printing on the oute
