Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 3: Single core and multicore cables screened and thin wall sheathed

EN 50306-3 specifies requirements for, and constructions and dimensions of, multicore cables, rated voltage Uo/U=300/500 V, of the following type: Screened, 0,5 mm2 to 2,5 mm2, number of cores from 1 to 8. 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 encountered.

Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 3: Ein- und mehradrige Kabel und Leitungen geschirmt mit reduzierten Mantelwanddicken

Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des performances particulières de comportement au feu - Isolation mince - Partie 3: Conducteurs et câbles blindés (paires, tierces et quartes) avec gaine d'épaisseur mince

Le présent document définit les exigences constructives et dimensionnelles des câbles multiconducteurs, de tension assignée U0/U = 300 V/500 V, du type suivant:
Câble blindé (0,5 mm2 à 2,5 mm2, 1 à 8 conducteurs).
Tous les câbles sont constitués d'âmes câblées en cuivre étamé, sous enveloppe isolante et gaine sans halogènes d'épaisseur mince. Ils sont destinés aux câblages fixes, ou aux câblages dont les flexions en service sont limitées, dans le matériel roulant ferroviaire.
Ces câbles sont conçus pour résister à des contraintes thermiques occasionnelles provoquant un vieillissement thermique équivalent à celui résultant d’un fonctionnement continu à 90 °C. Pour les câbles normalisés, cette température est déterminée par l’essai d’acceptation décrit dans l’EN 50305, qui consiste à appliquer un vieillissement thermique accéléré de longue durée (5 000 h) indiquant un indice de température de 110 °C/20 000 h. Si le client exigeait des prédictions de durée de vie, ces prédictions seraient fondées sur l’indice de température du produit tel que fourni par le fabricant. La température maximale admissible en cas de court-circuit est de 160 °C pendant 5 s.
Lorsqu'ils sont soumis au feu, les câbles présentent des caractéristiques de performance particulières quant aux valeurs maximales admissibles relatives à la propagation de la flamme et l'émission de fumées et de gaz toxiques. Ces exigences permettent aux câbles de satisfaire au niveau de risque 3 de l'EN 45545 1 et de l'EN 45545 2.
L’EN 50306 3:2020 est prévu pour être utilisé conjointement avec l’EN 50306 1:2020, Exigences générales, et avec l’EN 50306 2:2020, Câbles monoconducteurs.

Železniške naprave - Kabli v železniških vozilih s posebno požarno odpornostjo - Tanka stena - 3. del: Enožilni in večžilni kabli, zaslonjeni in tanko oplaščeni

General Information

Status
Published
Public Enquiry End Date
31-Jan-2019
Publication Date
07-Apr-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Apr-2020
Due Date
07-Jun-2020
Completion Date
08-Apr-2020

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SLOVENSKI STANDARD
SIST EN 50306-3:2020
01-junij-2020
Nadomešča:
SIST EN 50306-3:2003
Železniške naprave - Kabli v železniških vozilih s posebno požarno odpornostjo -
Tanka stena - 3. del: Enožilni in večžilni kabli, zaslonjeni in tanko oplaščeni

Railway applications - Railway rolling stock cables having special fire performance - Thin

wall - Part 3: Single core and multicore cables screened and thin wall sheathed
Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem

Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 3: Ein- und mehradrige

Kabel und Leitungen geschirmt mit reduzierten Mantelwanddicken
Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des
performances particulières de comportement au feu - Isolation mince - Partie 3:

Conducteurs et câbles blindés (paires, tierces et quartes) avec gaine d'épaisseur mince

Ta slovenski standard je istoveten z: EN 50306-3:2020
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.060.20 Kabli Cables
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
SIST EN 50306-3:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 50306-3:2020
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SIST EN 50306-3:2020
EUROPEAN STANDARD EN 50306-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020

ICS 13.220.40; 29.060.20; 45.060.01 Supersedes EN 50306-3:2002 and all of its amendments

and corrigenda (if any)
English Version
Railway applications - Railway rolling stock cables having
special fire performance - Thin wall - Part 3: Single core and
multicore cables screened and thin wall sheathed

Applications ferroviaires - Câbles pour matériel roulant Bahnanwendungen - Kabel und Leitungen für

ferroviaire ayant des performances particulières de Schienenfahrzeuge mit verbessertem Verhalten im

comportement au feu - Isolation mince - Partie 3 : Câbles Brandfall - Reduzierte Isolierwanddicken - Teil 3: Ein- und

monoconducteurs et multiconducteurs blindés avec gaine mehradrige Kabel und Leitungen geschirmt mit reduzierten

d'épaisseur mince Mantelwanddicken

This European Standard was approved by CENELEC on 2019-12-30. 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 such national standards may be obtained on application to the CEN-CENELEC

Management Centre 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 own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 50306-3:2020 E
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SIST EN 50306-3:2020
EN 50306-3:2020 (E)
Contents Page

European foreword ...................................................................................................................................3

Introduction ...............................................................................................................................................4

1 Scope ...............................................................................................................................................5

2 Normative references .......................................................................................................................5

3 Terms and definitions .......................................................................................................................5

4 Single and multicore screened cables .............................................................................................6

4.1 General ...................................................................................................................................6

4.2 Marking and code designation ...............................................................................................6

4.2.1 Marking of cable .............................................................................................................6

4.2.2 Code Designation ...........................................................................................................6

4.2.3 Marking on the insulation of cores for multi core cables ................................................7

4.3 Rated voltage .........................................................................................................................7

4.4 Construction ...........................................................................................................................7

4.4.1 Cores ..............................................................................................................................7

4.4.2 Laying-up of cores in multicore cables ...........................................................................7

4.4.3 Metallic braid screening ..................................................................................................7

4.4.4 Sheath ............................................................................................................................8

5 Tests .................................................................................................................................................9

5.1 Definitions relating to tests .....................................................................................................9

5.2 Voltage test .............................................................................................................................9

5.3 Voltage test on sheath ............................................................................................................9

5.4 Spark test on the sheath .........................................................................................................9

5.5 Water absorption of sheath ................................................................................................. 10

5.6 Hot set test of sheath ........................................................................................................... 10

5.7 Ageing test of sheath ........................................................................................................... 10

5.8 Mineral oil resistance of sheath ........................................................................................... 10

5.9 Fuel resistance of sheath .................................................................................................... 11

5.10 Acid and alkali resistance of sheath .................................................................................... 11

5.11 Pressure test at high temperature ....................................................................................... 12

5.12 Dynamic cut through ............................................................................................................ 12

5.13 Notch propagation of sheath ............................................................................................... 12

5.14 Bending test at low temperature .......................................................................................... 12

5.15 Abrasion resistance of sheath ............................................................................................. 12

5.16 Ozone resistance ................................................................................................................. 12

5.17 Stress cracking test ............................................................................................................. 13

5.18 Fire performance tests ......................................................................................................... 13

Annex A (informative) Guidance on selection of cables for type approval ........................................... 16

Bibliography ........................................................................................................................................... 17

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SIST EN 50306-3:2020
EN 50306-3:2020 (E)
European foreword

This document (EN 50306-3:2020) has been prepared by CLC/TC 20, “Electric cables”.

The following dates are fixed:
• latest date by which this document has (dop) 2020-12-30
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2022-12-30
standards conflicting with this document
have to be withdrawn

This document supersedes EN 50306-3:2002 and all of its amendments and corrigenda (if any).

This edition includes the following significant technical changes with respect to the previous edition:

— The documents have been updated to reflect the changes in the test standard EN 50305;

— The reference to cited standards (e.g. EN 60811 series) has been updated.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

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SIST EN 50306-3:2020
EN 50306-3:2020 (E)
Introduction

The EN 50306 series 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: General requirements;
Part 2: Single core cables;
Part 3: Single core and multicore cables screened and thin wall sheathed;
Part 4: Multicore and multipair screened or not screened sheathed cables.

Special test methods referred to in the EN 50306 series are given in EN 50305. A guide to use is given

in EN 50355 and rules for installation are given in EN 50343.

EN 50306-1, General requirements, contains a more extensive introduction to EN 50306 series and

should be read in conjunction with this document.
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SIST EN 50306-3:2020
EN 50306-3:2020 (E)
1 Scope

This document specifies requirements for, and constructions and dimensions of, multicore cables, rated

voltage U0/ U = 300/500 V, of the following type:
2 2
Screened (0,5 mm to 2,5 mm , number of cores from 1 to 8).

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 encountered.

These cables are rated for occasional thermal stresses causing ageing equivalent to continuous

operational life at a temperature of 90 °C. For standard cables, this is determined by the acceptance

test defined in EN 50305, using accelerated long-term (5 000 h) thermal ageing indicating a

110 °C/20 000 h temperature index. If the customer were to require lifetime predictions this would be

demonstrated based on the temperature index of the product as supplied by the manufacturer. The

maximum temperature for short circuit conditions is 160 °C based on duration of 5 s.

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 satisfy Hazard Level 3 of EN 45545-1

and EN 45545-2.

EN 50306-3:2020 is expected to be used in conjunction with EN 50306-1:2020, General Requirements,

and EN 50306-2:2020, Single core cables.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 45545-1, Railway applications - Fire protection on railway vehicles - Part 1: General

EN 60332-1-2, Tests on electric and optical fibre cables under fire conditions - Part 1-2: Test for vertical

flame propagation for a single insulated wire or cable - Procedure for 1 kW pre-mixed flame

EN 61034-2, Measurement of smoke density of cables burning under defined conditions - Part 2: Test

procedure and requirements

EN 50305:2020, Railway applications - Railway rolling stock cables having special fire performance -

Test methods

EN 50306-1:2020, Railway applications - Railway rolling stock cables having special fire performance -

Thin wall - Part 1: General requirements

EN 50306-2:2020, Railway applications - Railway rolling stock cables having special fire performance -

Thin wall - Part 2: Single core cables

EN 60811 (all parts), Electric and optical fibre cables - Test methods for non-metallic materials

EN 62230, Electric cables - Spark-test method
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

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SIST EN 50306-3:2020
EN 50306-3:2020 (E)
— ISOOnline browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Single and multicore screened cables
4.1 General

The completed cable shall conform to the applicable general requirements given in EN 50306-1:2020

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.

4.2 Marking and code designation
4.2.1 Marking of cable
Cables shall be marked with the following:
— Manufacturer's name;
— EN reference;
— Voltage rating (U0);
— Conductor size;
— A code designation according for use of the cable (see 4.2.2);
— Screening (S);
— Conductor temperature rating
For example:
XYZ EN 50306-3 300 V 1x1,5 MM S 90
The marking shall conform to the requirements of EN 50306-1:2020, Clause 5.
4.2.2 Code Designation
The following letters shall be
...

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