Railway applications - Fixed installations - Electrical safety, earthing and the return circuit - Part 3: Mutual Interaction of AC and DC traction systems

This document specifies requirements for the protective provisions relating to electrical safety in fixed installations, when it is reasonably likely that hazardous voltages or currents will arise for people or equipment, as a result of the mutual interaction of AC and DC electric power supply traction systems. It also applies to all aspects of fixed installations that are necessary to ensure electrical safety during maintenance work within electric power supply traction systems. The mutual interaction can be of any of the following kinds: — parallel running of AC and DC electric traction power supply systems; — crossing of AC and DC electric traction power supply systems; — shared use of tracks, buildings or other structures; — system separation sections between AC and DC electric traction power supply systems. The scope is limited to galvanic, inductive and capacitive coupling of the fundamental frequency voltages and currents and their superposition. This document applies to all new lines, extensions and to all major revisions to existing lines for the following electric traction power supply systems: 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, 5) trolleybus systems, and 6) electric traction power supply systems for road vehicles, which use an overhead contact line system; c) material transportation systems. The 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 or via transformers from the contact line system and are not endangered by the electric traction power supply system for railways; c) suspended cable cars; d) funicular railways; e) procedures or rules for maintenance. The rules given in this document can also be applied to mutual interaction with non-electrified tracks, if hazardous voltages or currents can arise from AC or DC electric traction power supply systems.

Bahnanwendungen - Ortsfeste Anlagen - Elektrische Sicherheit, Erdung und Rückleitung - Teil 3: Gegenseitige Beeinflussung von Wechselstrom- und Gleichstrombahnen

Applications ferroviaires - Installations fixes - Sécurité électrique, mise à la terre et circuit de retour - Partie 3: Interactions mutuelles entre systèmes de traction en courant alternatif et en courant continu

Le présent document spécifie les exigences relatives aux dispositions de protection concernant la sécurité électrique des installations fixes, lorsqu'il existe un risque raisonnable de présence de tensions ou de cou-rants dangereux pour les personnes ou les équipements, due aux interactions entre systèmes d'alimentation de traction électrique en courant alternatif et continu. Le présent document s'applique également à tous les aspects des installations fixes, qui sont nécessaires pour assurer la sécurité électrique pendant les travaux de maintenance réalisés au sein des systèmes d'ali-mentation de traction électrique. Les interactions mutuelles peuvent être de l'un des types suivants : — le fonctionnement en parallèle de systèmes d'alimentation de traction électrique en courant alternatif et continu ; — le croisement de systèmes d'alimentation de traction électrique en courant alternatif et continu ; — l'utilisation partagée des voies, des bâtiments ou d'autres structures ; — les sections de séparation entre les systèmes d'alimentation de traction électrique en courant alternatif et continu. Le domaine d'application se limite au couplage galvanique, inductif et capacitif des tensions et courants à la fréquence fondamentale et à leur superposition. Le présent document s'applique à l'ensemble des lignes nouvelles, ainsi qu'aux extensions et rénovations majeures des lignes existantes pour les systèmes d'alimentation de traction électrique suivants : a) les réseaux ferroviaires ; b) les réseaux de transport en commun guidés tels que : 1) les tramways ; 2) les voies ferroviaires aériennes et souterraines ; 3) les voies ferroviaires de montagne ; 4) les systèmes à sustentation magnétique, qui utilisent un système de ligne de contact ; 5) les systèmes de trolleybus ; et 6) les systèmes d'alimentation de traction électrique des véhicules routiers, qui utilisent un système de ligne aérienne de contact ; c) les systèmes de transport de matériaux. Le présent document ne s'applique pas aux : a) systèmes d’alimentation de traction électrique des mines souterraines ; b) grues, plateformes transportables et autres matériels de transport similaires sur rails, structures tempo-raires (dans les foires et expositions, par exemple) lorsqu'ils ne sont pas alimentés par les lignes aé-riennes de contact, directement ou par des transformateurs, ni affectés par le système d'alimentation électrique de traction ferroviaire ; c) téléphériques ; télécabines ; d) téléphériques, télécabines ; e) procédures ou règles de maintenance. Les règles établies dans le présent document peuvent également être appliquées à l'interaction mutuelle avec les voies non électrifiées, si des tensions ou courants dangereux peuvent provenir des systèmes d'alimentation de traction électrique en courant alternatif ou continu.

Železniške naprave - Fiksni postroji - Električna varnost, ozemljitev in povratni tokokrog - 3. del: Medsebojno vplivanje med izmeničnimi in enosmernimi sistemi vleke

General Information

Status
Published
Publication Date
01-Sep-2022
Current Stage
6060 - Document made available - Publishing
Start Date
02-Sep-2022
Due Date
12-Jan-2022
Completion Date
02-Sep-2022

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SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN 50122-3:2010
Železniške naprave - Fiksni postroji - Električna varnost, ozemljitev in povratni
tokokrog - 3. del: Medsebojno vplivanje med izmeničnimi in enosmernimi sistemi
vleke
Railway applications - Fixed installations - Electrical safety, earthing and the return circuit
- Part 3: Mutual Interaction of AC and DC traction systems
Bahnanwendungen - Ortsfeste Anlagen - Elektrische Sicherheit, Erdung und Rückleitung
- Teil 3: Gegenseitige Beeinflussung von Wechselstrom- und Gleichstrombahnen
Applications ferroviaires - Installations fixes - Sécurité électrique, mise à la terre et circuit
de retour - Partie 3: Interactions mutuelles entre systèmes de traction en courant
alternatif et en courant continu
Ta slovenski standard je istoveten z: EN 50122-3:2022
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
29.280 Električna vlečna oprema Electric traction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50122-3
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2022
ICS 29.120.50; 29.280 Supersedes EN 50122-3:2010
English Version
Railway applications - Fixed installations - Electrical safety,
earthing and the return circuit - Part 3: Mutual Interaction of AC
and DC traction systems
Applications ferroviaires - Installations fixes - Sécurité Bahnanwendungen - Ortsfeste Anlagen - Elektrische
électrique, mise à la terre et circuit de retour - Partie 3: Sicherheit, Erdung und Rückleitung - Teil 3: Gegenseitige
Interactions mutuelles entre systèmes de traction en Beeinflussung von Wechselstrom- und Gleichstrombahnen
courant alternatif et en courant continu
This European Standard was approved by CENELEC on 2022-07-25. 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,
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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50122-3:2022 E
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 6
4 Hazards and adverse effects . 6
4.1 General . 6
4.2 Electrical safety of persons . 6
5 Types of mutual interaction to be considered . 6
5.1 General . 6
5.2 Galvanic coupling . 7
5.2.1 AC and DC return circuits not directly connected . 7
5.2.2 AC and DC return circuits directly connected or common . 7
5.3 Non-galvanic coupling . 7
5.3.1 Inductive coupling . 7
5.3.2 Capacitive coupling . 8
6 Zone of mutual interaction . 8
6.1 General . 8
6.2 Effects of AC railway systems on DC railway systems . 8
6.3 Effects of DC railway systems on AC railway systems . 9
7 Touch voltage limits for the combination of alternating and direct voltages . 9
7.1 General . 9
7.2 Touch voltage limits for long-term conditions . 9
7.3 AC system short-term conditions and DC system long-term conditions . 10
7.4 AC system long-term conditions and DC system short-term conditions . 11
7.5 AC system short-term conditions and DC system short-term conditions . 12
7.6 Workshops and similar locations . 12
8 Technical requirements and measures inside the zone of mutual interaction . 13
8.1 General . 13
8.2 Requirements if the AC railway and the DC railway have separate return circuits . 13
8.2.1 General . 13
8.2.2 Return circuit or parts connected to the return circuit of one system located in the OCLZ
and/or CCZ of the other system . 13
8.2.3 Common buildings and common structures . 14
8.2.4 Inductive and capacitive coupling . 15
8.3 Requirements if the AC railway and the DC railway have common return circuits and use
the same tracks . 15
8.3.1 General . 15
8.3.2 Measures against stray current . 15
8.3.3 Common structures and common buildings . 15
8.3.4 Exceptions . 16
8.3.5 Design of overhead contact line . 16
8.3.6 Inductive and capacitive coupling . 16
8.4 System separation sections and system separation stations . 16
Annex A (informative) Zone of mutual interaction . 17
A.1 General . 17
A.2 AC system as source . 17
A.2.1 Main parameters. 17
A.2.2 Basic analysis . 17
A.2.3 Parameter variations . 20
A.3 DC system as source . 22
Annex B (informative) Analysis of combined voltages . 23
Annex C (informative) Analysis and assessment of mutual interaction . 28
C.1 General . 28
C.2 Analysis of mutual interaction . 28
C.3 System configurations to be taken into consideration . 28
Figures
Figure 1 — Maximum permissible combined effective touch voltages (excluding workshops and
similar locations) for long-term conditions . 10
Figure 2 — Maximum permissible combined effective touch voltages under AC short-term
conditions and DC long-term conditions . 11
Figure 3 — Maximum permissible combined effective touch voltages under AC long-term
conditions and DC short-term conditions . 12
Figure 4 — Maximum permissible combined effective touch voltages in workshops and similar
locations excluding short-term conditions . 13
Figure 5 — Example of where a VLD shall be suitable for both alternating and direct voltage . 14
Figure A.1 — Overview of voltages coupled in as function of distance and soil resistivity I . 18
Figure A.2 — Overview of voltages coupled in as function of distance and soil resistivity II . 19
Figure A.3 — Relation between length of parallelism and zone of mutual interaction caused by an
AC railway . 20
Figure B.1 — Definition of combined peak voltage . 24
Figure B.2 — Overview of permissible combined AC and DC voltages . 25
Figure B.3 — Overview of permissible voltages in case of a duration ≥ 1,0 s both AC voltage and
DC voltage . 26
Figure B.4 — Permissible voltages in case of a duration 0,1 s AC voltage and a duration 300 s DC
voltage . 27

European foreword
This document (EN 50122-3:2022) has been prepared by CLC/SC 9XC “Electric supply and earthing systems
for public transport equipment and ancillary apparatus (Fixed installations)”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2023-07-25
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2025-07-25
conflicting with this document have to be
withdrawn
This document supersedes EN 50122-3:2010 and all of its amendments and corrigenda (if any).
— harmonization with EN 50122-1:2022.
Attention is drawn to the possibility that some of the elements of this document
...

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