1、BRITISH STANDARD BS EN 50306-3:2002 Railway applications Railway rolling stock cables having special fire performance Thin wall Part 3: Single core and multicore cables (pairs, triples and quads) screened and thin wall sheathed The European Standard EN 50306-3:2002 has the status of a British Standa
2、rd ICS 13.220.40; 45.060.01 BS EN 50306-3:2002 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
3、0 580 40743 8 National foreword This British Standard is the official English language version of EN 50306-3:2002. 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 lis
4、t of organizations represented on this 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 Stan
5、dards Correspondence Index”, or by using 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 Standar
6、d does not of itself confer immunity from 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
7、developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publica
8、tion Amd. No. Date CommentsEUROPEAN STANDARD EN 50306-3 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 3
9、5, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50306-3:2002 E ICS 13.220.40; 45.060.01 English version Railway applications - Railway rolling stock cables having special fire performance - Thin wall Part
10、 3: Single core and multicore cables (pairs, triples and quads) screened and thin wall sheathed Applications ferroviaires - Cbles pour matriel roulant ferroviaire ayant des performances particulires de comportement au feu - Isolation mince Partie 3: Conducteurs et cbles blinds (paires, tierces et qu
11、artes) avec gaine dpaisseur mince Bahnanwendungen - Kabel und Leitungen fr Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken Teil 3: Ein- und mehradrige Kabel und Leitungen (Paare, Dreier, Vierer) geschirmt mit reduzierten Mantelwanddicken This European Standar
12、d 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 references concerning
13、 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 member into its o
14、wn 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, Malta, Netherla
15、nds, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.EN 50306-3:2002 - 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 CENELEC TC 9X, Ele
16、ctrical and electronic applications for railways. The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50306-3 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
17、 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 A and B are informative. _- 3 - EN 50
18、306-3:2002 Contents Introduction .4 1 Scope4 2 Normative references5 3 Single and multicore cables 6 4 Tests.9 Annex A (informative) Guidance on selection of cables for type approval .15 Annex B (informative) Bibliography .15 Table 1 - Requirements for construction of cables - screened and sheathed8
19、 Table 2 - Schedule of tests for thin wall sheathed cables14EN 50306-3:2002 - 4 - Introduction EN 50306 covers a range of sheathed and unsheathed cables with thin wall thickness insulation and based on halogen free materials, for use in railway rolling stock. It is divided into four parts. Part 1: G
20、eneral 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 given in EN 50305. A guide to use is
21、given in EN 50355 1) . EN 50306-1, General requirements, contains a more extensive introduction to EN 50306, and should be read in conjunction with this European Standard. 1 Scope EN 50306-3 specifies requirements for, and constructions and dimensions of, multicore cables, rated 300 V to earth, of t
22、he following type: Screened (0,5 mm 2to 2,5 mm 2 , number of cores from 1 to 4) All cables have stranded tinned copper conductors, and thin wall thickness, halogen-free, insulation and sheath. They are for use in railway rolling stock as fixed wiring, or wiring where limited flexing in operation is
23、encountered. The requirements provide for a continuous operational life at temperatures of 90 C or 105 C dependent upon the sheath system type. NOTE 1 For cables with type S2 sheath a temperature of 105 C is only allowed when specifically tested for the higher rating (i.e. by long-term thermal endur
24、ance testing to demonstrate a lifetime of at least 20 000 h at 125 C). The maximum temperature for short-circuit conditions is 160 C based on a duration of 5 s. Under fire conditions the cables exhibit special performance characteristics in respect of maximum permissible flame propagation (flame spr
25、ead) 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 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
26、 3 EN 45545-1 is still under development and should be consulted. EN 50306-3 should be used in conjunction with EN 50306-1, General Requirements, and EN 50306-2, Single core cables.1)At draft stage.- 5 - EN 50306-3:2002 2 Normative references This European Standard incorporates by dated or undated r
27、eference, 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 these references apply to this European Standard only when incorporated in
28、 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 Common test methods for cables under fire conditions - Test for
29、 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 of materials from cables Part 2-1: Procedures - Determination
30、 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 for materials by measuring pH and conductivity EN 50268-2 Common
31、 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 methods EN 50306-1 Railway applications-Railway rolling stock
32、 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 insulating sleeving - Part 2 Methods of test EN 60811-1-1 Ins
33、ulating 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) EN 60811-1-3 Insulating and sheathing materials of electric and opt
34、ical 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 materials of electric and optical cables - Common test methods - Part 1-4: General application - Tes
35、t at low temperature (IEC 60811-1-4)2)At draft stage.EN 50306-3:2002 - 6 - 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 resistance, hot set and mineral oil immersion tests (IEC 60811
36、-2-1) 3 Single and multicore cables 3.1 General The completed cable shall conform to the applicable general requirements given in EN 50306-1 and to the specific requirements of this Part 3. Conformity with the requirements shall be checked by inspection and by the tests given in Table 2. 3.2 Designa
37、tion, marking 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); - temperature rating. For example: EN 50
38、306-3 4x1,5 MF 105 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 of a particular cable for use under one of the Hazard Levels of EN 45545-1, and to indicate performance levels relating to low te
39、mperature and to oil and fuel resistance: NOTE For sheathed cables two letters are required, one for the insulation and one for the sheath. 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 fue
40、l resistance G H J - extra low temperature / extra oil and fuel resistance K L M 3.2.3 Marking on the insulation of cores for pairs, triples and quads The cores shall be marked 1, 2, etc. in accordance with the requirements given in 3.3.2 of EN 50306-2. However, the core number 1 may be marked as th
41、e relevant single core in accordance with the requirements of 3.3.1 of EN 50306-2.- 7 - EN 50306-3:2002 3.2.4 Marking of cable Cables shall be marked with the following: - manufacturers name; - EN reference; - voltage rating; - number of cores and conductor size; - identifier for the particular Haza
42、rd Level (see 3.2.2); - screening (S); - temperature rating. For example: XYZ EN 50306-3 300 V 1x1,5 MF S 105 The marking shall conform to the requirements of clause 5 of EN 50306-1. 3.3 Rated voltage The rated voltage recognized for the purposes of this standard shall be 300 V to earth. NOTE See EN
43、 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 cores in multicore cables The cores of multicore cables shall be twisted together. The pitch of lay for the cores shall not be greater tha
44、n 20 times the diameter of the laid up cores in the cable. 3.4.3 Metallic braid screening The braid shall consist of tinned, annealed copper wires. There shall be no more than one splice in any spindle of the braid over any 100 mm length of the braid. The braid shall be applied evenly, and it should
45、 neither slip nor leave an imprint on the insulation. The filling factor Kr shall be according to the formula: Kr m.n.d L 2 1 22 2 05 ,EN 50306-3:2002 - 8 - The wires of the braid shall be greater than or equal to 0,10 mm diameter. The filling factor Kr shall be 0,55 minimum. The lay angle (the angl
46、e of a braid wire and the centreline of the cable) shall be between 15 and 35, and shall be checked by application of the following formula: 490 , 1 L 1 072 , 1 2 2 2 = diameter under the braid + 2d d = nominal diameter of a wire m = total number of spindles n = number of wires per spindle L = braid
47、ing pitch 3.4.4 Sheath The sheath shall be either type S1 or S2 as defined in EN 50306-1, and shall meet the requirements specified in Table 1 of that EN. The sheath shall be applied by extrusion. The sheath thickness shall conform to the specified value given in Table 1 below. The sheath colour sha
48、ll be black unless otherwise specified. Table 1 - Requirements for construction of cables - screened and sheathed 12 3 Number of cores Minimum thickness Overall diameter and nominal of sheath at any point cross section min. max. mm 2 mm mm 1 x 0,5 0,20 2,3 2,8 2 x 0,5 0,20 3,5 4,3 3 x 0,5 0,20 3,7 4
49、,5 4 x 0,5 0,20 4,0 5,0 1 x 0,75 0,20 2,5 3,0 2 x 0,75 0,20 3,9 4,7 3 x 0,75 0,20 4,0 5,0 4 x 0,75 0,20 4,5 5,5 1 x 1 0,20 2,7 3,2 2 x 1 0,20 4,2 5,2 3 x 1 0,20 4,5 5,5 4 x 1 0,20 5,0 6,0 1 x 1,5 0,20 3,1 3,6 2 x 1,5 0,20 5,1 6,1 3 x 1,5 0,20 5,4 6,4 4 x 1,5 0,20 6,0 7,0 1 x 2,5 0,20 3,6 4,4 2 x 2,5 0,20 6,4 7,4 3 x 2,5 0,20 6,8 7,8 4 x 2,5 0,20 7,5 8,5- 9 - EN 50306-3:2002 4 Tests 4.1 Definitions relating to tests The definition o
