EN 50306-1:2020
(Main)Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 1: General requirements
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
Relations
Overview
EN 50306-1:2020 - Railway applications: Railway rolling stock cables having special fire performance - Thin wall - Part 1: General requirements - defines the general requirements for thin-wall, halogen‑free cables intended for railway rolling stock. It sets construction, marking, electrical and fire-safety requirements that enable cables in the EN 50306 series to meet Hazard Level 3 of EN 45545‑1 and EN 45545‑2. The standard is intended to be used together with EN 50306‑2, ‑3 and ‑4 which detail specific cable types.
Key topics and technical requirements
- Scope & voltage: Applies to thin-wall cables for rolling stock (rated voltage U = 300 V) with conductor sizes typically from about 0.5 mm² up to 2.5 mm².
- Fire performance: Limits vertical flame spread, smoke and toxic gas emissions to support safe evacuation and reduced hazard in fire scenarios. Designed to satisfy Hazard Level 3 of EN 45545 series.
- Materials & construction: Specifies materials for conductors, insulation systems, S2 sheathing materials, fillers, inner sheaths and (where used) metallic screens. Insulation details are covered primarily in EN 50306‑2.
- Thermal ageing and temperature indices: Cables are rated for occasional thermal stresses equivalent to continuous operation at 105 °C or 90 °C. Acceptance testing (per EN 50305) uses accelerated long‑term thermal ageing (5 000 h) to indicate a temperature index (e.g., 125 °C or 110 °C / 20 000 h).
- Short‑circuit performance: Maximum conductor temperature for short‑circuit conditions is 160 °C for 5 s.
- Testing and conformity: References EN 50305 test methods and harmonizes with IEC/EN fire and material test procedures (e.g., flame propagation, smoke density, halogen/acid gas measurement).
Applications and users
- Where used: Control, signal and auxiliary power wiring in trains, trams and other rolling stock where reduced flame spread, low smoke and low toxic emissions are critical.
- Who uses it:
- Cable manufacturers and material suppliers (product design and quality control)
- Rolling stock designers and OEMs (specification and procurement)
- Railway safety engineers and compliance teams (fire hazard mitigation)
- Test laboratories and certification bodies (type/acceptance testing)
Related standards
- EN 50306‑2, EN 50306‑3, EN 50306‑4 (specific cable types)
- EN 50305 (test methods)
- EN 45545‑1 / EN 45545‑2 (rail fire safety – Hazard Levels)
- EN 50264 series, EN 50355 (guidance), EN 60332, EN 60754, EN 61034, EN 60811
EN 50306‑1 is essential when specifying thin‑wall, halogen‑free railway cables that must meet high fire‑safety performance and regulatory compliance for modern rolling stock projects.
Standards Content (Sample)
SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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
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
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
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.
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 .
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
...
Frequently Asked Questions
EN 50306-1:2020 is a standard published by CLC. Its full title is "Railway applications - Railway rolling stock cables having special fire performance - Thin wall - Part 1: General requirements". This standard covers: 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.
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.
EN 50306-1:2020 is classified under the following ICS (International Classification for Standards) categories: 13.220.40 - Ignitability and burning behaviour of materials and products; 29.060.20 - Cables; 45.060.01 - Railway rolling stock in general. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 50306-1:2020 has the following relationships with other standards: It is inter standard links to EN 50306-1:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 50306-1:2020 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CLC standards.
SIST EN 50306-1:2020は、特殊な防火性能を有する鉄道用車両用ケーブルに関する標準であり、薄壁構造のケーブルに関する一般的な要求事項を規定しています。この標準は、EN 50306-2、EN 50306-3、およびEN 50306-4に記載されているケーブルに適用され、関連する詳細な要求事項が明確にされています。特に、S2シース材やその他の構成要素に関する具体的な要件が含まれており、これにより、ケーブルの設計と製造に対するより厳格な基準が求められます。 この標準の強みは、火災安全に関連する要求事項を明確に定義している点です。EN 50306-1は、EN 45545-1およびEN 45545-2の危険レベル3を満たすために必要な要件を具体的に規定しており、これにより鉄道産業における安全性が大幅に向上します。さらに、短絡条件下での最大温度を160°C（5秒間の条件）に設定していることも、急な温度変化に対する信頼性を高めています。 耐久性に関しても、通常の運転寿命に相当する105°Cまたは90°Cの温度での加齢を模擬した試験を通じて評価され、顧客が必要とする寿命予測もメーカーが提供する温度インデックスに基づいて実証されます。このため、EN 50306-1はクライアントの特定のニーズに柔軟に対応できることが期待されます。 全体として、SIST EN 50306-1:2020は、鉄道用の特殊な防火性能を持つケーブルに対する明確で実用的な基準を提供しており、鉄道産業における安全性と信頼性の向上に大いに貢献するものです。標準の適用範囲は広く、他のEN 50306の部分との併用が推奨されることから、包括的な品質管理と安全性の確保に向けた強固な基盤を提供しています。
SIST EN 50306-1:2020 표준은 철도 적용 분야에서 특별한 내화 성능을 가진 철도 차량 케이블에 대한 일반 요구사항을 규정하고 있습니다. 이 표준의 범위는 EN 50306-2, EN 50306-3 및 EN 50306-4에서 다루어진 케이블에 적용될 수 있는 일반 요구사항을 포함하며, S2 피복 재료 및 기타 별도의 부분에서 요구되는 구성 요소에 대한 세부 요구사항을 명시합니다. 이 표준의 강점은 화재 안전과 관련된 요구사항을 체계적으로 설정하고, EN 45545-1 및 EN 45545-2의 위험 수준 3을 만족할 수 있도록 하는 것입니다. 또한, EN 50306-1은 105 °C 또는 90 °C에서의 지속적인 작동 수명에 상응하는 노화가 발생하는 경우의 임시 열적 스트레스를 받을 수 있도록 케이블을 설계하고 있습니다. 이는 EN 50305에서 정의된 수용 시험을 통해 평가되며, 가속된 장기(5,000 시간) 열 노화 테스트를 사용하여 125 °C 또는 110 °C/20,000 시간의 온도 지수를 나타냅니다. 따라서, 고객이 수명 예측을 원할 경우 제조업체가 제공한 제품의 온도 지수를 기반으로 나타낼 수 있습니다. 단락 회로 조건에서의 최대 온도는 5초 동안 160 °C로 설정되어 있으며, 이는 케이블의 안전성과 신뢰성을 높이는 데 기여합니다. SIST EN 50306-1:2020은 다른 EN 50306의 여러 부분과 함께 활용되어야 할 것으로 기대되며, 이는 표준의 통합적인 적용 가능성을 강조합니다. 이 표준은 철도 차량의 안전성과 효율성을 크게 향상시키는 동시에 관련 산업의 요구를 충족시키는 데 있어 중요한 역할을 합니다.
EN 50306-1:2020 provides a comprehensive framework for the railway applications relating to rolling stock cables that have exceptional fire performance. This standard delineates the general requirements necessary for the cables referenced in subsequent parts, namely EN 50306-2, EN 50306-3, and EN 50306-4, ensuring a well-structured approach to cable design and compliance across various applications within the railway sector. One of the key strengths of EN 50306-1 is its emphasis on fire safety requirements. By establishing criteria that align with Hazard Level 3 of EN 45545-1 and EN 45545-2, this standard addresses critical safety measures necessary to protect against fire hazards in railway environments. The detailed requirements specified for S2 sheathing materials and the discussion of insulation systems provide manufacturers with clear guidelines on material performance, enhancing the overall reliability and safety of railway rolling stock cables. Additionally, the standard's provision for thermal performance is a significant advantage. It accommodates occasional thermal stresses that mimic continuous operational life at elevated temperatures of 105 °C or 90 °C, which is vital for cables subjected to varied thermal conditions. The stipulated acceptance tests, which include accelerated long-term thermal ageing, ensure that cables can sustain their integrity over time, thus promoting durability and longevity. Moreover, the clarity in demonstrating lifetime predictions based on temperature indices supports manufacturers in validating their products to meet customer expectations. This aspect is further reinforced by the maximum temperature allowance for short circuit conditions, underscoring the comprehensive safety approach embedded within the document. Overall, EN 50306-1:2020 is a relevant and essential standard for the development and testing of railway rolling stock cables, balancing safety, durability, and performance. Its comprehensive scope and well-defined parameters make it an invaluable resource for manufacturers aiming to comply with stringent industry requirements while fostering innovation within the railway sector.
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