CLC/TS 50729:2025
(Main)Railway applications - Fixed installations and rolling stock - Interface requirements between charging infrastructure with dedicated contact line sections and electric traction units with onboard electric traction energy storages and current collectors
Railway applications - Fixed installations and rolling stock - Interface requirements between charging infrastructure with dedicated contact line sections and electric traction units with onboard electric traction energy storages and current collectors
This document specifies interface requirements between charging infrastructure with dedicated contact line sections and electric traction units with onboard electric traction energy storages and current collectors. The dedicated contact line section can be - separated from other contact line systems of electrified railway lines and fed separately, or - connected electrically and/or mechanically with contact line systems of electrified railway lines. The charging infrastructure can be used for charging the traction units with onboard electric traction energy storages at a standstill and/or when moving. This document covers the following aspects: - supply voltages and frequencies, - compatibility (e.g. avoidance of (unacceptable) unbalances) with the feeding grid (national 3 AC grid), - interaction between the vehicle traction/charging system and the electric traction charging power supply system, - transmitting required information towards driver and/or electric traction unit, - contact line system, - maximum load current, - contact line protection principles, - electrical safety, - stray current protection (in case of DC electric traction power supply systems), - protection against influence on signalling systems, and - energy measurement and settlement. This document applies to new charging infrastructure and/or new electric traction units with onboard electric traction energy storage. Although this document is primarily applicable to railways it can also be partially applied to guided mass transport systems such as: 1) tramways, and 2) elevated and underground railways. This document does not apply to charging with a plug or connector solution or inverted current collectors mounted on the infrastructure side. This document does not apply to electric road systems with overhead contact line systems.
Bahnanwendungen - Ortsfeste Anlagen und Fahrzeuge - Schnittstellenanforderungen zwischen Ladeinfrastruktur mit dedizierten Fahrleitungsabschnitten und elektrischen Triebfahrzeugen mit bordeigenen elektrischen Traktionsenergiespeichern und Stromabnehmern
Applications ferroviaires - Installations fixes - Exigences relatives aux infrastructures de charge pour les unités de traction électrique à accumulateur basées sur des sections de ligne de contact
Železniške naprave - Fiksni postroji in vozna sredstva - Zahteve za vmesnik med polnilno infrastrukturo z namenskimi odseki voznega voda in električnimi vlečnimi enotami z vgrajenimi hranilniki energije za električno vleko in odjemniki toka
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Železniške naprave - Fiksni postroji in vozna sredstva - Zahteve za vmesnik med
polnilno infrastrukturo z namenskimi odseki voznega voda in električnimi vlečnimi
enotami z vgrajenimi hranilniki energije za električno vleko in odjemniki toka
Railway applications - Fixed installations and rolling stock - Interface requirements
between charging infrastructure with dedicated contact line sections and electric traction
units with onboard electric traction energy storages and current collectors
Bahnanwendungen - Ortsfeste Anlagen - Anforderungen für auf dafür vorgesehenen
Fahrleitungsabschnitten basierende Ladeinfrastruktur von Akkumulator-elektrischen
Applications ferroviaires - Installations fixes - Exigences relatives aux infrastructures de
charge pour les unités de traction électrique à accumulateur basées sur des sections de
ligne de contact
Ta slovenski standard je istoveten z: CLC/TS 50729:2025
ICS:
29.280 Električna vlečna oprema Electric traction equipment
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL SPECIFICATION CLC/TS 50729
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION May 2025
ICS 35.240.50; 29.280
English Version
Railway applications - Fixed installations and rolling stock -
Interface requirements between charging infrastructure with
dedicated contact line sections and electric traction units with
onboard electric traction energy storages and current collectors
Applications ferroviaires - Installations fixes - Exigences Bahnanwendungen - Ortsfeste Anlagen und Fahrzeuge -
relatives aux infrastructures de charge pour les unités de Schnittstellenanforderungen zwischen Ladeinfrastruktur mit
traction électrique à accumulateur basées sur des sections dedizierten Fahrleitungsabschnitten und elektrischen
de ligne de contact Triebfahrzeugen mit bordeigenen elektrischen
Traktionsenergiespeichern und Stromabnehmern
This Technical Specification was approved by CENELEC on 2025-04-16.
CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.
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.
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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TS 50729:2025 E
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Symbols and abbreviated terms . 12
4.1 Symbols . 12
4.2 Abbreviated terms . 12
5 System description . 13
5.1 Coordination between parties . 13
5.2 Interfaces . 13
5.3 Electric traction units . 14
5.4 Charging infrastructure . 14
5.4.1 General . 14
5.4.2 Electrification system Type 0 . 14
5.4.3 Charging infrastructure Type I . 15
5.4.4 Charging infrastructure Type II . 15
5.4.5 Charging infrastructure Type III . 16
5.4.6 Charging infrastructure Type IV . 17
5.4.7 Charging substation . 17
6 Electrical interface between charging infrastructure and electric traction unit . 18
6.1 General . 18
6.2 Voltage and frequency . 18
6.3 Transition from/to non-electrified sections . 18
6.4 Dimensioning study . 19
6.5 Electric traction unit current and power limitation function . 19
6.6 Coordination of protection . 20
6.7 Discharge in standstill to charging substation . 20
7 Mechanical interface between contact line system and current collector . 20
7.1 General . 20
7.2 Overhead contact line . 21
7.2.1 Current limits due to temperature and contact force . 21
7.2.2 Double overhead contact line on contact strip . 21
7.2.3 ROCL beyond the carbon strip . 22
7.3 Third rail contact line systems . 22
7.4 Current collectors . 22
7.5 Transition from/to non-electrified sections or other contact line sections . 23
7.5.1 Risk analysis . 23
7.5.2 Mitigation actions against risks . 23
7.5.3 Example for transition zone. 24
8 Electrical interface between charging infrastructure/electric traction units and train
detection/signalling system (EMC) . 26
9 Electrical interface between charging infrastructure/electric traction unit and distribution grid
.......................................................................................................................................................... 26
10 Electrical interface between charging infrastructure/electric traction units and railway
infrastructure . 27
11 Operational interface between charging infrastructure and electric traction unit . 27
12 Traffic management and signalling . 28
12.1 Interface to traffic management . 28
12.2 Signalling of transitions from/to non-electrified sections . 28
13 Energy measurement and settlement . 29
Bibliography . 30
Figures
Figure 1 — Schema of interfaces . 14
Figure 2 — Example for charging infrastructure Type I . 15
Figure 3 — Example for charging infrastructure Type II (vertical profile) . 16
Figure 4 — Example for charging infrastructure Type III . 16
Figure 5 — Example for charging infrastructure Type IV . 17
Figure 6 — Example for double overhead contact line on contact strip . 21
Figure 7 — Example for two ROCLs beyond the carbon strip . 22
Figure 8 — Principle of a transition-from/to non-electrified section. 25
European foreword
This document (CLC/TS 50729:2025) has been prepared by CLC/SC 9XC “Electric supply and earthing
systems for public transport equipment and ancillary apparatus (Fixed installations)” of CLC/TC 9X “Electrical
and electronic applications for railways”.
It is also relevant to the scope and expertise of CLC/SC 9XB, “Electromechanical material on board of rolling
stock”.
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.
Any feedback and questions on this document should be directed to the users’ national committee. A complete
listing of these bodies can be found on the CENELEC website.
Introduction
Climate change requires the use of railway vehicles that have a climate-neutral energy balance and avoid fossil
fuels.
Electric traction units with onboard electric traction energy storages are one of these solutions. They can be
charged by current collectors from a contact line system and connected substation(s).
In addition to the use of the known electric traction power supply systems, the document is intended to allow
new, technically feasible supply systems for charging on dedicated contact line sections.
By approving such systems, a contribution to a climate-neutral system can be made quickly. Additionally, there
are economical solutions for such charging infrastructure.
1 Scope
This document specifies interface requirements between charging infrastructure with dedicated contact line
sections and electric traction units with onboard electric traction energy storages and current collectors.
The dedicated contact line section can be
— separated from other contact line systems of electrified railway lines and fed separately, or
— connected electrically and/or mechanically with contact line systems of electrified railway lines.
The charging infrastructure can be used for charging the traction units with onboard electric traction energy
storages at a standstill and/or when moving.
This document covers the following aspects:
— supply voltages and frequencies,
— compatibility (e.g. avoidance of (unacceptable) unbalances) with the feeding grid (national 3 AC grid),
— interaction between the vehicle traction/charging system and the electric traction charging power supply
system,
— transmitting required information towards driver and/or electric traction unit,
— contact line system,
— maximum load current,
— contact line protection principles,
— electrical safety,
— stray current protection (in case
...
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