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EN 50122-2:2022/prA1:2024

(Amendment)

Fixed installations for railway applications - Electrical safety, earthing and the return circuit - Part 2: Provisions against the effects of stray currents caused by DC traction systems

Fixed installations for railway applications - Electrical safety, earthing and the return circuit - Part 2: Provisions against the effects of stray currents caused by DC traction systems

This document specifies requirements for protective provisions against the effects of stray currents, which result from the operation of DC electric traction power supply systems. As several decades' experience has not shown evident corrosion effects from AC electric traction power supply systems, this document only deals with stray currents flowing from a DC electric traction power supply system. This document applies to all metallic fixed installations which form part of the traction system, and also to any other metallic components located in any position in the earth, which can carry stray currents resulting from the operation of the railway system. This document applies to all new DC lines and to all major revisions to existing DC lines. The principles can also be applied to existing electrified transportation systems where it is necessary to consider the effects of stray currents. This document does not specify working rules for maintenance but provides design requirements to allow maintenance. The range of application includes: a) railways, b) guided mass transport systems such as: 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) magnetically levitated systems, which use a contact line system, and 5) trolleybus systems, c) material transportation systems. This document does not apply to a) electric traction power supply systems in underground mines, b) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly from the contact line system and are not endangered by the electric traction power supply system, c) suspended cable cars, d) funicular railways.

Ortsfeste Anlagen für Bahnanwendungen - Elektrische Sicherheit, Erdung und Rückleitung - Teil 2: Schutzmaßnahmen gegen Streustromwirkungen durch Gleichstrombahnen

Installations Fixes pour applications ferroviaires - Sécurité électrique, mise à la terre et circuit de retour - Partie 2: Mesures de protection contre les effets des courants vagabonds issus de la traction électrique à courant continu

Železniške naprave - Fiksni postroji - Električna varnost, ozemljitev in povratni tokokrog - 2. del: Zaščitni ukrepi proti učinkom blodečih tokov, ki jih povzročajo enosmerni sistemi vleke

General Information

Status
Not Published
Publication Date
04-Sep-2025
ICS
29.120.50 - Fuses and other overcurrent protection devices
29.280 - Electric traction equipment
Technical Committee
CLC/TC 9X - Electrical and electronic applications for railways
Drafting Committee
CLC/SC 9XC - Electric supply and earthing systems for public transport equipment and ancillary apparatus (fixed i
Current Stage
4020 - Enquiry circulated - Enquiry
Start Date
19-Apr-2024
Due Date
07-Feb-2024
Completion Date
19-Apr-2024
Directive
2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
Mandate
M/483 - Mandate for programming and standardisation addressed to the European standardisation bodies under directive 2008/57/EC in the field of the interoperability of the rail system within the European Union
Ref Project
SIST EN 50122-2:2022/oprA1:2024 - Fixed installations for railway applications - Electrical safety, earthing and the return circuit - Part 2: Provisions against the effects of stray currents caused by DC traction systems

Relations

Amends
EN 50122-2:2022 - Railway applications - Fixed installations - Electrical safety, earthing and the return circuit - Part 2: Provisions against the effects of stray currents caused by DC traction systems
Effective Date
14-Feb-2023

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SLOVENSKI STANDARD
SIST EN 50122-2:2022/oprA1:2024
01-junij-2024
Železniške naprave - Fiksni postroji - Električna varnost, ozemljitev in povratni
tokokrog - 2. del: Zaščitni ukrepi proti učinkom blodečih tokov, ki jih povzročajo
enosmerni sistemi vleke
Fixed installations for railway applications - Electrical safety, earthing and the return
circuit - Part 2: Provisions against the effects of stray currents caused by DC traction
systems
Ortsfeste Anlagen für Bahnanwendungen - Elektrische Sicherheit, Erdung und
Rückleitung - Teil 2: Schutzmaßnahmen gegen Streustromwirkungen durch
Gleichstrombahnen
Installations Fixes pour applications ferroviaires - Sécurité électrique, mise à la terre et
circuit de retour - Partie 2: Mesures de protection contre les effets des courants
vagabonds issus de la traction électrique à courant continu
Ta slovenski standard je istoveten z: EN 50122-2:2022/prA1:2024
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
29.280 Električna vlečna oprema Electric traction equipment
SIST EN 50122-2:2022/oprA1:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50122-2:2022/oprA1:2024

---------------------- Page: 2 ----------------------
SIST EN 50122-2:2022/oprA1:2024


EUROPEAN STANDARD DRAFT
EN 50122-2:2022
NORME EUROPÉENNE

EUROPÄISCHE NORM
prA1
April 2024
ICS 29.120.50; 29.280 -
English Version
Fixed installations for railway applications - Electrical safety,
earthing and the return circuit - Part 2: Provisions against the
effects of stray currents caused by DC traction systems
Installations Fixes pour applications ferroviaires - Sécurité Ortsfeste Anlagen für Bahnanwendungen - Elektrische
électrique, mise à la terre et circuit de retour - Partie 2: Sicherheit, Erdung und Rückleitung - Teil 2:
Mesures de protection contre les effets des courants Schutzmaßnahmen gegen Streustromwirkungen durch
vagabonds issus de la traction électrique à courant continu Gleichstrombahnen
This draft amendment prA1, if approved, will modify the European Standard EN 50122-2:2022; it is submitted to CENELEC members for
enquiry.
Deadline for CENELEC: 2024-07-12.

It has been drawn up by CLC/SC 9XC.

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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 77508 Ref. No. EN 50122-2:2022/prA1:2024 E

---------------------- Page: 3 ----------------------
SIST EN 50122-2:2022/oprA1:2024
EN 50122-2:2022/prA1:2024 (E)
1 Contents Page
2 European foreword . 3
3 1 Modification to the Title . 4
4 2 Modification to Clause 4, Identification of hazards and risks . 4
5 3 Modification to 5.1, General . 4
6 4 Modification to 5.2, General Criteria for the protection of the tracks . 4
7 5 Modification to 5.3, Criteria for systems with steel reinforced
...

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