Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 1: General requirements

EN 50306-1 specifies the general requirements applicable to the cables given in EN 50306-2, EN 50306-3 and EN 50306-4. It includes the detailed requirements for S2 sheathing materials and other components called up in the separate parts. NOTE Detailed requirements 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 Level 3 of EN 45545-1 and EN 45545-2. These cables are rated for occasional thermal stresses which causes ageing equivalent to continuous operational life at a temperature of 105 °C or 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 125 °C or 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. EN 50306-1 is expected to be used in conjunction with one or more of the other parts of EN 50306.

Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 1: Allgemeine Anforderungen

Die EN 50306-1 legt die allgemeinen Anforderungen für die in den Teilen EN 50306-2, EN 50306-3 und EN 50306-4 genormten Kabel und Leitungen fest. Sie enthält die genauen Anforderungen für die Mantelmischung S2 und andere Komponenten, die in einzelnen Teilen verwendet werden. ANMERKUNG Genaue Anforderungen an Isoliersysteme sind in EN 50306-2 festgelegt. Insbesondere legt EN 50306-1 die Anforderungen fest, die die Brandsicherheit betreffen und es ermöglichen, dass Kabel und Leitungen die Gefährdungsstufe 3 von EN 45545-1 und EN 45545-2 erfüllen. Diese Kabel und Leitungen sind für gelegentliche Wärmebeanspruchung ausgelegt, die zu einer Werkstoffalterung führt, die dem des Dauerbetriebs bei 90 °C oder 105 °C entspricht. Für Standardkabel und –leitungen wird dies durch die in EN 50305 festgelegte Prüfung nachgewiesen, wobei eine beschleunigte thermische Langzeitalterung (5 000 h) verwendet wird, die einen Temperaturindex von 110 °C oder 125 °C / 20 000 h anzeigt. Würde der Kunde Lebensdauervorhersagen verlangen, würde dies anhand des vom Hersteller gelieferten Temperaturindex des Produkts demonstriert werden. Die höchste zulässige Temperatur unter Kurzschlussbedingungen, bezogen auf eine Dauer von 5 s, beträgt 160 °C. EN 50306-1 wird voraussichtlich in Verbindung mit einem oder mehreren anderen Teilen der EN 50306 verwendet werden.

Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des performances particulières de comportement au feu - Isolation mince - Partie 1 : Exigences générales

L’EN 50306 1 définit les exigences générales relatives aux câbles figurant dans les normes EN 50306 2, EN 50306 3 et EN 50306 4. Elle comporte les exigences détaillées relatives aux matériaux de gainage S2 et autres constituants évoqués dans les parties individuelles. NOTE Les exigences détaillées relatives aux systèmes d'isolation sont données dans l’EN 50306-2. L’EN 50306-1 spécifie notamment les exigences de sécurité contre l'incendie permettant aux câbles de satisfaire au niveau de risque 3 de l’EN 45545-1 et de l’EN 45545-2. 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 125 °C ou 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. L’EN 50306-1 est prévue pour être utilisée conjointement avec une ou plusieurs des autres parties de l’EN 50306.

Železniške naprave - Kabli v železniških vozilih s posebno požarno odpornostjo - Tanka stena - 1. del: Splošne zahteve

General Information

Status
Published
Publication Date
19-Mar-2020
Technical Committee
Current Stage
6060 - Document made available
Due Date
22-Jun-2020

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SLOVENSKI STANDARD
SIST EN 50306-1:2020
01-junij-2020
Nadomešča:
SIST EN 50306-1:2003
Železniške naprave - Kabli v železniških vozilih s posebno požarno odpornostjo -
Tanka stena - 1. del: Splošne zahteve

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

wall - Part 1: General requirements
Bahnanwendungen - Kabel und Leitungen für Schienenfahrzeuge mit verbessertem

Verhalten im Brandfall - Reduzierte Isolierwanddicken - Teil 1: Allgemeine Anforderunge

Applications ferroviaires - Câbles pour matériel roulant ferroviaire ayant des
performances particulières de comportement au feu - Isolation mince - Partie 1:
Prescriptions générales
Ta slovenski standard je istoveten z: EN 50306-1:2020
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 50306-1:2020 en

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

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SIST EN 50306-1:2020
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SIST EN 50306-1:2020
EUROPEAN STANDARD EN 50306-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2020

ICS 13.220.40; 29.060.20; 45.060.01 Supersedes EN 50306-1:2002 and all of its amendments

and corrigenda (if any)
English Version
Railway applications - Railway rolling stock cables having
special fire performance - Thin wall - Part 1: General
requirements

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 1: Exigences Brandfall - Reduzierte Isolierwanddicken - Teil 1:

générales Allgemeine Anforderungen

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 50306-1:2020 E
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SIST EN 50306-1:2020
EN 50306-1:2020 (E)
Contents Page

European foreword ...................................................................................................................................4

Introduction ...............................................................................................................................................5

1 Scope ...............................................................................................................................................6

2 Normative references .......................................................................................................................6

3 Terms and definitions .......................................................................................................................7

4 Rated voltage ...................................................................................................................................8

5 Marking .............................................................................................................................................9

5.1 Indication of origin ..................................................................................................................9

5.2 Continuity of marks .................................................................................................................9

5.3 Durability .................................................................................................................................9

5.4 Legibility ..................................................................................................................................9

5.5 Additional marking ............................................................................................................... 10

5.6 Use of the name CENELEC ................................................................................................ 10

6 General requirements for the construction of cables .................................................................... 10

6.1 Conductors .......................................................................................................................... 10

6.1.1 Material ........................................................................................................................ 10

6.1.2 Construction ................................................................................................................ 10

6.1.3 Check of construction .................................................................................................. 10

6.1.4 Electrical resistance .................................................................................................... 10

6.2 Insulation system ................................................................................................................. 10

6.2.1 Material ........................................................................................................................ 10

6.2.2 Application ................................................................................................................... 10

6.2.3 Thickness and concentricity ........................................................................................ 10

6.3 Fillers and tapes .................................................................................................................. 11

6.3.1 Material ........................................................................................................................ 11

6.3.2 Application ................................................................................................................... 11

6.4 Inner sheath ......................................................................................................................... 11

6.4.1 Material ........................................................................................................................ 11

6.4.2 Application ................................................................................................................... 11

6.4.3 Thickness .................................................................................................................... 11

6.5 Metallic screen ..................................................................................................................... 11

6.5.1 Type of screen ............................................................................................................. 11

6.5.2 Application ................................................................................................................... 11

6.6 Sheath ................................................................................................................................. 11

6.6.1 Material ........................................................................................................................ 11

6.6.2 Application ................................................................................................................... 12

6.6.3 Thickness .................................................................................................................... 12

6.7 Overall diameter .................................................................................................................. 12

7 Electrical performance ................................................................................................................... 12

8 Fire performance - cables ............................................................................................................. 12

8.1 Flame propagation (flame spread) - single vertical cable ................................................... 12

8.2 Flame propagation (flame spread) - bunched cables .......................................................... 12

8.2.1 Cables with diameter more than or equal to 12 mm ................................................... 12

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SIST EN 50306-1:2020
EN 50306-1:2020 (E)

8.2.2 Cables with diameter greater than 6 mm and less than 12 mm.................................. 12

8.2.3 Cables with diameter not greater than 6 mm .............................................................. 13

8.3 Smoke emission .................................................................................................................. 13

9 Fire performance - components .................................................................................................... 13

9.1 Tests for corrosive and acid gas emission, and for fluorine ................................................ 13

9.2 Toxicity ................................................................................................................................. 13

Annex A (normative) Thickness and overall diameter Selection of samples and calculation of

results ............................................................................................................................................ 15

A.1 Insulation thickness ....................................................................................................................... 15

A.1.1 Procedure ............................................................................................................................ 15

A.1.2 Evaluation of results ............................................................................................................ 15

A.1.3 Concentricity ........................................................................................................................ 15

A.2 Measurement of sheath thickness ................................................................................................ 15

A.2.1 Procedure ............................................................................................................................ 15

A.2.2 Evaluation of results ............................................................................................................ 15

A.3 Measurement of overall diameter .................................................................................................. 15

Bibliography ........................................................................................................................................... 16

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SIST EN 50306-1:2020
EN 50306-1:2020 (E)
European foreword

This document (EN 50306-1:2020) 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 50306-1:2002 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 range of the conductor cross sections has been extended;
— the reference to cited standards (e.g. 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 50306-1:2020
EN 50306-1:2020 (E)
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 occur which could

involve fire, howsoever caused, affecting railway rolling stock.

Hence it is necessary to provide cables for use in railway environments which minimize the hazard to

people when a fire could damage the cable, irrespective of whether the fire is caused by an external

source or from within the electrical system.

The EN 50306 series 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 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 the EN 50306 series 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 last

characteristic will minimize loss of visibility in the event of a fire and will aid reduced evacuation times.

The objectives of this standard are:
— to standardize cables that are safe and reliable when properly used;

— to state the characteristics, performance, and construction requirements directly or indirectly

bearing on safety;
— to specify methods for checking conformity with these requirements.

The EN 50306 series, which covers a range of cables of rated voltage U = 300V with conductor sizes

2 2
0,5 mm up to 2,5 mm , is divided into 4 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.

These cables are intended for a limited number of applications. Further information on these

applications is given in EN 50355 and EN 50343.
Special test methods referred to in the EN 50306 series are given in EN 50305.

A separate European Standard, the EN 50264 series covers cables for similar applications up to

3,6/6 kV rating with a conductor temperature at 90°C, but with standard wall and medium wall

thicknesses of both insulation and sheath, and provides for a maximum conductor size of 400 mm .

A separate European Standard, the EN 50382 series covers cables for similar applications up to

3,6/6 kV rating with a conductor temperature at 120°C and 150°C, and provides for a maximum

conductor size of 400 mm .
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SIST EN 50306-1:2020
EN 50306-1:2020 (E)
1 Scope

EN 50306-1 specifies the general requirements applicable to the cables given in EN 50306-2,

EN 50306-3 and EN 50306-4. It includes the detailed requirements for S2 sheathing materials and

other components called up in the separate parts.
NOTE Detailed requirements 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 Level 3 of EN 45545-1 and EN 45545-2.

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

operational life at a temperature of 105 °C or 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 125 °C or 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.

EN 50306-1 is expected to be used in conjunction with one or more of the other parts of EN 50306.

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 50264-1, Railway applications — Railway rolling stock power and control cables having special fire

performance — Part 1: General requirements

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

Test methods

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

performance — Thin wall — Part 2: Single core cables

EN 50306-3:2020, 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 50306-4:2020, Railway applications — Railway rolling stock cables having special fire

performance — Thin wall — Part 4: Multicore and multipair screened or not screened sheathed cables

EN 50355, Railway applications — Railway rolling stock cables having special fire performance —

Guide to use

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

vertical flame propagat
...

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