EN 50123-1:2003

Railway applications - Fixed installations - D.C. switchgear - Part 1: General

The EN 50123 series specifies requirements for d.c. switchgear and controlgear and is intended to be used in fixed electrical installations with nominal voltage not exceeding 3 000 V d.c., which supply electrical power to vehicles for public guided transport, i.e. railway vehicles, tramway vehicles, underground vehicles and trolley-buses. Part 1 specifies general requirements. The other parts are covering Part 2 D.C. circuit breakers, Part 3 Indoor d.c. disconnectors, switch-disconnectors and earthing switches, Part 4 Outdoor d.c. disconnectors, switch-disconnectors and earthing switches, Part 5 Surge arresters and low voltage limiters for specific use in d.c. systems, Part 6 D.C. switchgear assemblies, Part 7 1 Measurement, control and protection devices for specific use in d.c. traction systems – Application guide, Part 7 2 Measurement, control and protection devices for specific use in d.c. traction systems – Isolating current transducers and other current measuring devices, Part 7 3 Measurement, control and protection devices for specific use in d.c. traction systems –Isolating voltage transducers and other voltage measuring devices

Bahnanwendungen - Ortsfeste Anlagen - Gleichstrom-Schalteinrichtungen - Teil 1: Allgemeines

Applications ferroviaires - Installations fixes - Appareillage à courant continu - Partie 1: Généralités

Železniške naprave – Stabilne naprave električne vleke – Stikalne naprave za enosmerni tok – 1. del: Splošno

General Information

• Status: Published
• Publication Date: 27-Feb-2003
• ICS: 29.280 - Electric traction equipment
• ICS: 45.020 - Railway engineering in general
• 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
• Parallel Committee: IEC/TC 9 - IEC_TC_9
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 14-Sep-2022
• Directive: 96/48/EC - Interoperability of the trans-European high-speed rail system
• Ref Project: SIST EN 50123-1:2003 - Railway applications - Fixed installations - D.C. switchgear -- Part 1: General

Relations

• Replaces: EN 50123-1:1995 - Railway applications - Fixed installations - D.C. switchgear - Part 1: General
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2003
1DGRPHãþD
SIST EN 50123-1:1998
äHOH]QLãNHQDSUDYH±6WDELOQHQDSUDYHHOHNWULþQHYOHNH±6WLNDOQHQDSUDYH]D
HQRVPHUQLWRN±GHO6SORãQR
Railway applications - Fixed installations - D.C. switchgear -- Part 1: General
Bahnanwendungen - Ortsfeste Anlagen - Gleichstrom-Schalteinrichtungen -- Teil 1:
Allgemeines
Applications ferroviaires - Installations fixes - Appareillage à courant continu -- Partie 1:
Généralités
Ta slovenski standard je istoveten z: EN 50123-1:2003
ICS:
29.130.99 Druge stikalne in krmilne Other switchgear and
naprave controlgear
29.280 (OHNWULþQDYOHþQDRSUHPD Electric traction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50123-1
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2003

ICS 29.120.60; 45.020 Supersedes EN 50123-1:1995

English version
Railway applications –
Fixed installations – D.C. switchgear
Part 1: General
Applications ferroviaires –  Bahnanwendungen –
Installations fixes – Ortsfeste Anlagen –
Appareillage à courant continu Gleichstrom-Schalteinrichtungen
Partie 1: Généralités Teil 1: Allgemeines

This European Standard was approved by CENELEC on 2002-09-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50123-1:2003 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 the Technical Committee CENELEC
TC 9X, Electrical and electronic applications for railways.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50123-1 on
2002-09-01.
This European Standard supersedes EN 50123-1:1995. It has been prepared taking into account
IEC document 9/578/FDIS (61992-1) in order to align technically as much as possible this EN 50123-1
and IEC 61992-1. These documents are to be considered as technically equivalent except for those
references and peculiarities which are due to the European standardisation in the railway application field.
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) 2003-09-01

- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-09-01

Annexes designated “normative” are part of the body of the standard.
Annexes designated “informative” are given for information only.
In this standard, Annexes A, B and C are normative and Annexes D and E are informative.
_____________
– 3 – EN 50123-1:2003
Contents
1 Scope.4
2 Normative references .4
3 Definitions .6
3.1 General terms.6
3.2 Performance characteristics.9
3.3 Components .13
3.4 Terms relating to d.c. circuit breakers, switch-disconnectors and associated relays .17
4 Service conditions and requirements.22
4.1 Environmental conditions .22
4.2 Insulation levels .22
5 Standard features and conventional assumptions.24
5.1 Standard features and conventional parameters for the main circuit .24
5.2 Standard features for auxiliary and control circuits.26
6 Temperature-rise limits.26
7 Tests .27
7.1 General .27
7.2 Test tolerances .28
7.3 Tests on movable devices.28
7.4 Temperature-rise test .30
7.5 Dielectric tests .32
7.6 Short circuit and load switching conditions .32
7.7 Verification of the behaviour during short-time withstand current test.34
7.8 Verification of the manual control device for sturdiness and position indicator
reliability.34
Annex A (normative) Diagrams for tests.36
Annex B (normative)  Environmental conditions for indoor installations .38
Annex C (normative) Search of critical currents for d.c. circuit breakers and switches.40
Annex D (informative) Recommended creepage distances .42
Annex E (informative) Determination of maximum energy fault location .43
Bibliography.46
Figure A.1 - Diagram of the test circuit for checking the making and breaking capacities
in short-circuit and load/overload switching conditions .37
Figure A.2 - Typical calibrations and interruption under short-circuit and load/overload
switching conditions .38
Figure E.1 - Equivalent circuit of a d.c. traction system .46
Figure E.2 - Ratio of I /I to T /T .46
maxE ss s c
Table 1 - Insulation levels.24
Table 2 - Test circuit parameters for maximum circuit energy .25
Table 3 - Preferred voltages for auxiliary and control circuits [V] .27
Table 4 - Temperature-rise limits for insulated coils.27
Table 5 - Temperature-rise limits for various components.28
Table 6 - Test tolerances.29
Table 7 - Recommended quantities and dimensions of copper bars .32
Table 8 - Values of forces or torques for the tests.36
Table B.1 - Limits of sinusoidal vibrations.40
Table D.1 - Material group identification .43
Table D.2 - Recommended creepage distances, in mm/kV (base U ).43
Nm
1 Scope
The EN 50123 series specifies requirements for d.c. switchgear and controlgear and is intended to be
used in fixed electrical installations with nominal voltage not exceeding 3 000 V d.c., which supply
electrical power to vehicles for public guided transport, i.e. railway vehicles, tramway vehicles,
underground vehicles and trolley-buses.
Part 1 specifies general requirements.
The other parts are covering
Part 2 D.C. circuit breakers,
Part 3 Indoor d.c. disconnectors, switch-disconnectors and earthing switches,
Part 4 Outdoor d.c. disconnectors, switch-disconnectors and earthing switches,
Part 5 Surge arresters and low voltage limiters for specific use in d.c. systems,
Part 6 D.C. switchgear assemblies,
Part 7-1 Measurement, control and protection devices for specific use in d.c. traction systems –
Application guide,
Part 7-2 Measurement, control and protection devices for specific use in d.c. traction systems –
Isolating current transducers and other current measuring devices,
Part 7-3 Measurement, control and protection devices for specific use in d.c. traction systems –
Isolating voltage transducers and other voltage measuring devices
2 Normative references
This European Standard series incorporates by dated or undated references, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of
these publications apply to this European Standard series only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
EN 50119 2001 Railway applications – Fixed installations – Electric traction overhead contact
lines
EN 50121 Series Railway applications – Electromagnetic compatibility
EN 50122-1 1997 Railway applications – Fixed installations – Part 1: Protective provisions relating
to electrical safety and earthing
EN 50124-1 2001 Railway applications – Insulation coordination – Part 1: Basic requirements –
Clearances and creepage distances for electrical and electronic equipment
EN 50125-2 2002 Railway applications – Environmental conditions for equipment – Part 2: Fixed
electrical installations
EN 50126 1999 Railway applications – The specification and demonstration of Reliability,
Availability, Maintainability and Safety (RAMS)
EN 50163 1995 Railway applications – Supply voltage of traction systems (IEC 60850:2000)
EN 60099-1 1994 Surge arresters – Part 1: Non-linear resistor type gapped surge arresters for a.c.
systems (IEC 60099-1:1991)
– 5 – EN 50123-1:2003
EN 60099-4 1993 Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c.
systems (IEC 60099-4:1991)
EN 60129 1994 Alternating current disconnectors and earthing switches
+ A1 1994 (IEC 60129:1984 + A1:1992 + A2:1996)
+ A2 1996
EN 60243-1 1998 Electrical strength of insulating materials – Test methods – Part 1: Tests at
power frequencies (IEC 60243-1:1998)
EN 60269 series Low-voltage fuses (IEC 60269 series)
EN 60298 1996 AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV
and up to and including 52 kV (IEC 60298:1990 + corr. April 1995 + A1:1994)
EN 60507 1993 Artificial pollution tests on high-voltage insulators to be used on a.c. systems
(IEC 60507:1991)
EN 60529 1991 Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN 60694 1996 Common specifcations for high-voltage switchgear and controlgear standards
(IEC 60694:1996)
EN 60721 series Classification of environmental conditions (IEC 60721 series)
EN 60947-1 1999 Low-voltage switchgear and controlgear – Part 1: General rules
(IEC 60947-1:1999, mod.)
EN 60947-2 1996 Low-voltage switchgear and controlgear – Part 2: Circuit breakers
+ A1 1997 (IEC 60947-2:1995 + A1:1997)
HD 214 S2 1980 Method for determining the comparative and the proof tracking indices of solid
insulating materials under moist conditions (IEC 60112:1979)
HD 380 S2 1987 Test methods for evaluating resistance to tracking and erosion of electrical
insulating materials used under severe ambient conditions (IEC 60587:1984)
HD 588.1 S1 1991 High-voltage test techniques – Part 1: General definitions and test requirements
(IEC 60060-1:1989 + corr. March 1990)
IEC 60050-441 1984 International Electrotechnical Vocabulary (IEV) – Chapter 441: Switchgear,
controlgear and fuses
IEC 60050-446 1983 International Electrotechnical Vocabulary (IEV) – Chapter 446: Electrical relays
IEC 60050-605 1983 International Electrotechnical Vocabulary (IEV) – Chapter 605: Generation,
transmission and distribution of electricity – Substations
IEC 60050-811 1991 International Electrotechnical Vocabulary (IEV) – Chapter 811: Electr
...