prEN IEC 62973-1:2025/prAA:2026
(Amendment)Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 1: General Requirements
General Information
- Abstract
The part 1 of IEC 62973 will get a European annex. The European annex will contain additions regarding some European technical requirements (like system voltage, link to EN 45545).
- Status
- Not Published
- Publication Date
- 13-Mar-2028
- Technical Committee
- CLC/TC 9X - Electrical and electronic applications for railways
- Drafting Committee
- WG 45 - RS - Auxiliary Batteries
- Current Stage
- 4020 - Enquiry circulated - Enquiry
- Start Date
- 07-Aug-2026
- Due Date
- 26-Jan-2026
- Completion Date
- 07-Aug-2026
Overview
prEN IEC 62973-1:2025/prAA:2026 is a draft amendment to the European standard for railway applications, specifically focusing on batteries used for auxiliary power supply systems in rolling stock. Prepared under the auspices of CENELEC Technical Committee CLC/TC 9X, this part-1 standard defines the general requirements for battery systems, ensuring safety, interoperability, and reliability across the European rail sector. The European annex introduces additional technical requirements relevant to the region, such as system voltage preferences and fire safety regulations.
Key Topics
- Normative References: Incorporation of key European standards, including EN 50125-1 for environmental conditions and EN 45545 for fire protection.
- Abbreviated Terms: Introduction of "LVPS" (Low Voltage Power Supply) to standardize terminology across documentation.
- Environmental Requirements: Specific definitions for ambient temperature and humidity ranges for railway battery operation, referencing EN 50125-1, with flexibility for agreement among stakeholders such as end users, system integrators, and manufacturers.
- System Voltage: Assigns 110 V (with tolerances) as the preferred system voltage for low voltage supply networks, referencing EN 50155 for recommended voltages in rolling stock.
- Temperature Performance: Defines low temperature discharge requirements, mandating that batteries perform at -18°C or as stipulated by the end user, ensuring operability in harsh European climates.
- Fire Protection: Mandates compliance with the EN 45545 series for fire safety, emphasizing the validation of non-metallic materials and the importance of integrating safety standards appropriate to battery technology and installation.
- Electrical Connections: Ensures battery system designs prevent polarity confusion and minimize the risk of short circuits at main and tray terminals.
- Transportation: Requires battery manuals to reflect national and European transportation regulations, especially concerning the movement of batteries and defective units.
- Shock and Vibration: Specifies inclusion of float charging operation under the conditions for shock and vibration tests to reflect real-world usage scenarios.
Applications
This standard is essential for:
- Train Manufacturers & Integrators: Ensures battery systems meet European operating, environmental, and safety requirements, facilitating cross-border railway interoperability.
- Battery Manufacturers: Provides clear, harmonized criteria for product development, testing, and certification in the European railway sector.
- Railway Operators: Assists with procurement, maintenance, and risk management by referencing common standards for auxiliary power batteries.
- Regulators & Safety Bodies: Supports the enforcement of consistent safety, fire protection, and transport regulations for rail vehicle batteries across EU member states.
Typical applications include auxiliary power supply for onboard lighting, communication systems, control electronics, and emergency backup in railway vehicles, with the standard ensuring these critical systems remain safe and reliable under all conditions.
Related Standards
- EN 50125-1: Railway applications - Environmental conditions for equipment - Part 1: Rolling stock and on-board equipment
- EN 45545 (all parts): Railway applications – Fire protection of railway vehicles
- EN 50155: Railway applications - Rolling stock - Electronic equipment
Adherence to prEN IEC 62973-1:2025/prAA:2026, in conjunction with these related standards, ensures compliant, safe, and resilient battery systems for modern railway rolling stock throughout Europe, supporting long-term infrastructure sustainability.
Relations
- Effective Date
- 25-Feb-2025
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Bureau Veritas Railway Certification
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Subsidiary of DQS Holding GmbH, founding member of IQNet. CDSCO Notified Body.
Excellence Ireland Quality Association (EIQA)
Irish quality certification organization.
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Frequently Asked Questions
prEN IEC 62973-1:2025/prAA:2026 is a draft published by CLC. Its full title is "Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part 1: General Requirements". This standard covers: The part 1 of IEC 62973 will get a European annex. The European annex will contain additions regarding some European technical requirements (like system voltage, link to EN 45545).
The part 1 of IEC 62973 will get a European annex. The European annex will contain additions regarding some European technical requirements (like system voltage, link to EN 45545).
prEN IEC 62973-1:2025/prAA:2026 is classified under the following ICS (International Classification for Standards) categories: 45.060.01 - Railway rolling stock in general. The ICS classification helps identify the subject area and facilitates finding related standards.
prEN IEC 62973-1:2025/prAA:2026 has the following relationships with other standards: It is inter standard links to prEN IEC 62973-1:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN IEC 62973-1:2025/prAA:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2026
Železniške naprave - Vozna sredstva - Baterije za pomožne napajalne sisteme - 1.
del: Splošne zahteve - Dopolnilo AA
Railway applications - Rolling stock - Batteries for auxiliary power supply systems - Part
1: General Requirements
Bahnanwendungen - Fahrzeuge - Batterien für Bordnetzversorgungssysteme – Teil 1:
Allgemeine Anforderungen
Applications ferroviaires - Matériel roulant - Batteries pour systèmes d'alimentation
auxiliaire - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: prEN IEC 62973-1:2025/prAA:2026
ICS:
29.220.20 Kislinski sekundarni členi in Acid secondary cells and
baterije batteries
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
oSIST prEN IEC 62973- en
1:2025/oprAA:2026
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD DRAFT
prEN IEC 62973-1:2025
NORME EUROPÉENNE
EUROPÄISCHE NORM
prAA
August 2026
ICS 45.060.01 -
English Version
Railway applications - Rolling stock - Batteries for auxiliary
power supply systems - Part 1: General Requirements
Applications ferroviaires - Matériel roulant - Batteries pour Bahnanwendungen - Fahrzeuge - Batterien für
systèmes d'alimentation auxiliaire - Partie 1: Exigences Bordnetzversorgungssysteme - Teil 1: Allgemeine
générales Anforderungen
This draft amendment prAA, if approved, will modify the European Standard prEN IEC 62973-1:2025; it is submitted to CENELEC members
for enquiry.
Deadline for CENELEC: 2026-10-30.
It has been drawn up by CLC/TC 9X.
If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.
This draft amendment was established by CENELEC 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,
Türkiye and the United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 81133 Ref. No. prEN IEC 62973-1:2025/prAA:2026 E
1 Contents Page
2 European foreword . 3
3 1 Modification to Clause 2, “Normative references” . 4
4 2 Modification to 3.2, “Abbreviated terms” . 4
5 3 Modification to 4.3, “Environmental conditions” . 4
6 4 Modification to 4.4.1, “System voltage” . 4
7 5 Modification to 4.4.3.4, “Low or high temperature performance” . 4
8 6 Modification to 4.6, “Fire protection” . 4
9 7 Modification to 6.2, “External electrical connections interface”
...