SIST EN 50122-2:2010
(Main)Railway applications - Fixed installations - Electrical safety, earthing and bonding - Part 2: Provisions against the effects of stray currents caused by d.c. traction systems
Railway applications - Fixed installations - Electrical safety, earthing and bonding - Part 2: Provisions against the effects of stray currents caused by d.c. traction systems
This European Standard specifies requirements for protective provisions against the effects of stray currents, which result from the operation of d.c. traction systems. As experience for several decades has not shown evident corrosion effects from a.c. traction systems and actual investigations are not completed, this European Standard only deals with stray currents flowing from a d.c. traction system. This European Standard 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 European Standard applies to all new d.c. lines and to all major revisions to existing d.c. lines. The principles may also be applied to existing electrified transportation systems where it is necessary to consider the effects of stray currents. It 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) trolleybus systems, and 5) magnetically levitated systems, which use a contact line system, c) material transportation systems. This European Standard does not apply to: d) mine traction systems in underground mines, e) 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 traction power supply system, f) suspended cable cars, g) funicular railways. This European Standard does not specify working rules for maintenance.
Bahnanwendungen - Ortsfeste Anlagen - Elektrische Sicherheit, Erdung und Rückstromführung - Teil 2: Schutzmaßnahmen in Bezug auf elektrische Sicherheit und Erdung
Applications ferroviaires - Installations fixes - Sécurité électrique, dispositions pour les courants de retour et mise à la terre - Partie 2: Mesures de protection contre les effets des courants vagabonds issus de la traction électrique à courant continu
Železniške naprave - Stabilne naprave električne vleke - 2. del: Zaščitni ukrepi proti učinkom blodečih tokov, ki jih povzročajo enosmerni vlečni sistemi
Ta evropski standard določa zahteve za zaščitne ukrepe proti učinkom blodečih tokov, ki nastajajo pri obratovanju enosmernih vlečnih sistemov. Ker večdesetletne izkušnje niso pokazale, da bi izmenični vlečni sistemi povzročali očitno korozijo, in trenutne preiskave še niso zaključene, ta evropski standard obravnava le blodeče tokove, ki jih povzročajo enosmerni vlečni sistemi. Ta evropski standard velja za vse kovinske pritrjene inštalacije, ki so del vlečnega sistema, in za vse druge kovinske komponente, kakor koli nameščene v ozemljitvi, ki lahko prenašajo blodeče tokove, ki nastajajo pri obratovanju železniškega sistema. Ta evropski standard velja za vse nove enosmerne vode in za vse večje prenove obstoječih enosmernih vodov. Načela lahko veljajo tudi za obstoječe elektrificirane prevozne sisteme, pri katerih je treba upoštevati učinke blodečih tokov. Zagotavlja zahteve za oblike, ki omogočajo vzdrževanje. Obseg aplikacij vključuje: a) železniške proge, b) vodene masovne prevozne sisteme, kot so: 1) tramvajske proge, 2) nadzemne in podzemne železnice, 3) gorske železnice, 4) trolejbusni sistemi in 5) sistemi z magnetnim lebdenjem, ki uporabljajo sistem voznih vodov, c) sisteme za prevoz materiala. Ta evropski standard ne velja za: d) rudniške vlečne sisteme v podzemnih rudnikih, e) žerjave, prenosne platforme in podobno opremo za prevoz po tirih, začasne strukture (npr. razstavne strukture), če ne prihajajo neposredno s sistema voznih vodov in jih ne ogroža napajanje sistema vleke, f) viseče kabinske žičnice, g) vzpenjače. Ta evropski standard ne določa delovnih pravil za vzdrževanje.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2010
1DGRPHãþD
SIST EN 50122-2:1998
SIST EN 50122-2:1998/A1:2003
äHOH]QLãNHQDSUDYH6WDELOQHQDSUDYHHOHNWULþQHYOHNHGHO =DãþLWQLXNUHSLSURWL
XþLQNRPEORGHþLKWRNRYNLMLKSRY]URþDMRHQRVPHUQLYOHþQLVLVWHPL
Railway applications - Fixed installations - Electrical safety, earthing and bonding - Part
2: Provisions against the effects of stray currents caused by d.c. traction systems
Bahnanwendungen - Ortsfeste Anlagen - Elektrische Sicherheit, Erdung und
Rückstromführung - Teil 2: Schutzmaßnahmen in Bezug auf elektrische Sicherheit und
Erdung
Applications ferroviaires - Installations fixes - Sécurité électrique, dispositions pour les
courants de retour et mise à la terre - 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 50122-2:2010
ICS:
13.260 9DUVWYRSUHGHOHNWULþQLP Protection against electric
XGDURP'HORSRGQDSHWRVWMR shock. Live working
29.280 (OHNWULþQDYOHþQDRSUHPD Electric traction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 50122-2
NORME EUROPÉENNE
October 2010
EUROPÄISCHE NORM
ICS 29.120.50; 29.280 Supersedes EN 50122-2:1998 + corr. Aug.2001 + A1:2002
English version
Railway applications -
Fixed installations -
Electrical safety, earthing and the return circuit -
Part 2: Provisions against the effects of stray currents caused by d.c.
traction systems
Applications ferroviaires - Bahnanwendungen -
Installations fixes - Ortsfeste Anlagen -
Sécurité électrique, mise à la terre et Elektrische Sicherheit, Erdung und
circuit de retour - Rückleitung -
Partie 2: Mesures de protection contre les Teil 2: Schutzmaßnahmen gegen
effets des courants vagabonds issus de la Streustromwirkungen durch Gleichstrom-
traction électrique à courant continu Zugförderungssysteme
This European Standard was approved by CENELEC on 2010-10-01. 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 Central Secretariat 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 Central Secretariat 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50122-2:2010 E
Foreword
This European Standard was prepared by SC 9XC, Electric supply and earthing systems for public
transport equipment and ancillary apparatus (Fixed installations), of Technical Committee CENELEC
TC 9X, Electrical and electronic applications for railways. It was submitted to the formal vote and was
approved by CENELEC as EN 50122-2 on 2010-10-01.
This document supersedes EN 50122-2:1998 + A1:2002.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2011-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2013-10-01
This draft European Standard has been prepared under a mandate given to CENELEC by the
European Commission and the European Free Trade Association and covers essential requirements
of EC Directives 96/48/EC (HSR), 2001/16/EC (CONRAIL) and 2008/57/EC (RAIL). See Annex ZZ.
______________
– 3 – EN 50122-2:2010
Contents
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Identification of hazards and risks . 6
5 Criteria for stray current assessment and acceptance . 7
5.1 General . 7
5.2 Criteria for the protection of the tracks . 7
5.3 Criteria for systems with metal reinforced concrete or metallic structures . 8
5.4 Specific investigations and measures . 8
6 Design provisions . 9
6.1 General . 9
6.2 Return circuit . 9
6.3 Non-traction related electrical equipment .10
6.4 Tracks of other traction systems .11
6.5 Return busbar in the substation .11
6.6 Level crossings .11
6.7 Common power supply for tram and trolleybus .11
6.8 Changeover from the mainline to depot and workshop areas .11
7 Provisions for influenced metallic structures .11
7.1 General .11
7.2 Tunnels, bridges, viaducts and reinforced concrete slab track .12
7.3 Adjacent pipes or cables .13
7.4 Voltage limiting devices .13
8 Protection provisions applied to metallic structures.13
9 Depots and workshops .14
10 Tests and measurements .14
10.1 Principles .14
10.2 Supervision of the rail insulation .14
Annex A (informative) Measurement of track characteristics .16
A.1 Rail resistance .16
A.2 Conductance per length between running rails and metal reinforced structures .17
A.3 Conductance per length for track sections without civil structure .18
A.4 Local conductance per length for track sections without civil structure .19
A.5 Insulating rail joints .21
A.6 Insulating joints between metal reinforced structures .21
Annex B (informative) Stray current assessment – Rail insulation assessment using rail
potential .23
B.1 Continuous monitoring of the rail potential .23
B.2 Repetitive measurements of the rail potential to monitor the conductance .24
Annex C (informative) Estimation of stray current and impact on metal structures .25
C.1 Estimation of the stray currents passing from the running rails to the earth .25
C.2 Estimation of the longitudinal voltage in metal reinforced structures .26
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives .28
Bibliography .29
Figures
Figure A.1 ― Measurement of the rail resistance for a rail of 10 m length .16
Figure A.2 ― Measuring arrangement for the conductance per length G´ between rails and
RS
metal reinforced structure .17
Figure A.3 ― Determination of the conductance per length G´ for track sections without civil
RE
structures .18
Figure A.4 ― Measuring arrangement for the local conductance per length .19
Figure A.5 ― Test of insulating rail joints .21
Figure A.6 ― Test of insulating joints in metal reinforced structures .22
Figure B.1 ― Continuous monitoring of the rail potential .23
– 5 – EN 50122-2:2010
1 Scope
This European Standard specifies requirements for protective provisions against the effects of stray
currents, which result from the operation of d.c. traction systems.
As experience for several decades has not shown evident corrosion effects from a.c. traction systems
and actual investigations are not completed, this European Standard only deals with stray currents
flowing from a d.c. traction system.
This European Standard 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 European Standard applies to all new d.c. lines and to all major revisions to existing d.c. lines.
The principles may also be applied to existing electrified transportation systems where it is necessary
to consider the effects of stray currents.
It 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) trolleybus systems, and
5) magnetically levitated systems, which use a contact line system,
c) material transportation systems.
This European Standard does not apply to:
d) mine traction systems in underground mines,
e) 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 traction power supply system,
f) suspended cable cars,
g) funicular railways.
This European Standard does not specify working rules for maintenance.
2 Normative references
The following referenced documents are indispensable for the application 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 50122-1:2010, Railway applications – Fixed installations – Electrical safety, earthing and the return
circuit – Part 1: Protective provisions against electric shock
EN 50122-3:2010, Railway applications – Fixed installations – Electrical safety, earthing and the return
circuit – Part 3: Mutual interaction of a.c. and d.c. traction systems
EN 50162:2004, Protection against corrosion by stray current from direct current systems
EN 50163, Railway applications – Supply voltages of traction systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50122-1:2010 app
...
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