EN 50123-5:2003

Railway applications - Fixed installations - D.C. switchgear - Part 5: Surge arresters and low-voltage limiters for specific use in d.c. systems

Applies, in particular, to surge arresters consisting of single or multiple spark gaps in series with one or more non-linear resistors. This consolidated version consists of the third edition (1991) and its amendment 1 (1999). Therefore, no need to order amendment in addition to this publication.

Bahnanwendungen - Ortsfeste Anlagen - Gleichstrom-Schalteinrichtungen - Teil 5: Überspannungsableiter und Niederspannungsbegrenzer für spezielle Verwendung in Gleichstromsystemen

Applications ferroviaires - Installations fixes - Appareillage à courant continu - Partie 5: Parafoudres et limiteurs de tension pour utilisation spécifique dans les systèmes à courant continu

S'applique particulièrement aux parafoudres comportant un éclateur simple ou multiple en série, avec une ou plusieurs résistances variables. Cette version consolidée comprend la troisième édition (1991) et son amendement 1 (1999). Il n'est donc pas nécessaire de commander l'amendement avec cette publication.

Železniške naprave – Stabilne naprave električne vleke – Stikalne naprave za enosmerni tok – 5. del: Prenapetostni odvodniki in nizkonapetostni omejilniki za izključno uporabo v enosmernih sistemih

General Information

• Status: Withdrawn
• Publication Date: 27-Feb-2003
• Withdrawal Date: 31-Aug-2005
• 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: 9960 - Withdrawal effective - Withdrawal
• Start Date: 10-Oct-2014
• Completion Date: 10-Oct-2014
• Ref Project: SIST EN 50123-5:2003 - Railway applications - Fixed installations - D.C. switchgear -- Part 5: Surge arresters and low-voltage limiters for specific use in d.c. systems

Relations

• Replaces: EN 50123-5:1997 - Railway applications - Fixed installations - D.C. switchgear - Part 5: Surge arresters and low-voltage limiters for specific use in d.c. systems
• Effective Date: 28-Jan-2023
• Replaces: EN 50123-5:1997/A1:1999 - Railway applications - Fixed installations - D.C. switchgear - Part 5: Surge arresters and low-voltage limiters for specific use in d.c. systems
• Effective Date: 28-Jan-2023
• Replaced By: EN 50526-1:2012 - Railway applications - Fixed installations - D.C. surge arresters and voltage limiting devices - Part 1: Surge arresters
• Effective Date: 28-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2003
1DGRPHãþD
SIST EN 50123-5:1998
SIST EN 50123-5:1998/A1:1999
äHOH]QLãNHQDSUDYH±6WDELOQHQDSUDYHHOHNWULþQHYOHNH±6WLNDOQHQDSUDYH]D
HQRVPHUQLWRN±GHO3UHQDSHWRVWQLRGYRGQLNLLQQL]NRQDSHWRVWQLRPHMLOQLNL]D
L]NOMXþQRXSRUDERYHQRVPHUQLKVLVWHPLK
Railway applications - Fixed installations - D.C. switchgear -- Part 5: Surge arresters and
low-voltage limiters for specific use in d.c. systems
Bahnanwendungen - Ortsfeste Anlagen - Gleichstrom-Schalteinrichtungen -- Teil 5:
Überspannungsableiter und Niederspannungsbegrenzer für spezielle Verwendung in
Gleichstromsystemen
Applications ferroviaires - Installations fixes - Appareillage à courant continu -- Partie 5:
Parafoudres et limiteurs de tension pour utilisation spécifique dans les systèmes à
courant continu
Ta slovenski standard je istoveten z: EN 50123-5:2003
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 50123-5
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2003

ICS 29.120.60; 45.020 Supersedes EN 50123-5:1997 + A1:1999

English version
Railway applications –
Fixed installations - D.C. switchgear
Part 5: Surge arresters and low-voltage limiters
for specific use in d.c. systems

Applications ferroviaires –  Bahnanwendungen –
Installations fixes – Ortsfeste Anlagen –
Appareillage à courant continu Gleichstrom-Schalteinrichtungen
Partie 5: Parafoudres et limiteurs Teil 5: Überspannungsableiter und
de tension pour utilisation spécifique Niederspannungsbegrenzer
dans les systèmes à courant continu für spezielle Verwendung
in Gleichstromsystemen
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 50123-5:2003 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 Unique Acceptance Procedure and was approved
by CENELEC as EN 50123-5 on 2002-09-01.

This European Standard supersedes EN 50123-5:1997 + A1:1999.

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

This Part 5 is to be used in conjunction with EN 50123-1:2003, with EN 60099-1:1994 and with
EN 60099-4:1993.
Annexes designated “informative” are given for information only.
In this standard, annexes A and B are informative.
_____________
- 3 - EN 50123-5:2003
Contents
Page
Introduction . 5
1 Common matters . 6
1.1 Scope . 6
1.2 Normative references. 6
2 Non-linear resistor type gapped surge arresters. 7
2.1 General. 7
2.2 Definitions . 7
2.3 Marking . 7
2.4 Preferred ratings. 7
2.5 Requirements. 8
2.6 General testing procedure. 9
2.7 Routine and acceptance tests . 9
2.8 Type tests. 8
3 Artificial pollution testing of surge arresters. 14
4 Metal-oxide surge arresters without gaps. 15
4.1 General. 15
4.2 Definitions . 15
4.3 Marking . 15
4.4 Preferred ratings. 15
4.5 Requirements. 16
4.6 General testing procedure. 17
4.7 Type tests. 17
4.8 Routine and acceptance tests . 22
5 Low-voltage limiters for specific use in d.c. systems. 25
5.1 General. 25
5.2 Definitions . 25
5.3 Marking and classification. 25
5.4 Preferred ratings. 25
5.5 Requirements. 26
5.6 Routine and acceptance tests . 27
5.7 Type tests. 27

Annex A (informative) Typical information given with enquiries and tenders
valid for all types covered in this European Standard . 30

Annex B (informative) High voltage filters for protection against voltage surges . 32

Figure 1 - Simulated d.c. voltage test circuit for operating duty test for surge arresters
by using an equivalent energy impulse current generator .13
Figure 4.1 - Operating duty test on gapless arresters for use in d.c. networks
(see 4.7.5.4) .24
Figure 4.2 - Thermal stability test on gapless arresters for use in d.c. networks
(see 4.8.2.2) .24
Figure B.1 - Typical diagram of the filter .32

Table 2.1A - Preferred voltage ratings (kV).7
Table 2.1B - Preferred protective voltage levels (kV ) .8
cr
Table 2.1C - Preferred nominal discharge currents (kA) .8
Table 2.3 - Arrester test requirements .10
Table 2.4 - High-current impulse test.12
Table 4.1 - Preferred voltage ratings (kV).15
Table 4.2 - Preferred protective voltage levels (kV ) .16
cr
Table 4.3 - Preferred nominal discharge currents (kA).16
Table 4.4 - Arrester test requirements .18
Table 5.1 - Preferred voltage ratings (V).25
Table 5.2 - Requirements for LVL.26
Table 5.3 - Type tests .27
Table B.1 - Preferred values for charge resistor.33
Table B.2 - Preferred values for capacitor.33
Table B.3 - Preferred values for discharge resistor rating.34

- 5 - EN 50123-5:2003
Introduction
EN 50123-5 is divided into five clauses as follows:

1 common matters;
2 non-linear resistor type gapped surge arresters (based on EN 60099-1);
3 artificial pollution testing of surge arresters: under consideration;
4 metal-oxide surge arresters without gaps (based on EN 60099-4) and surge protective
devices (based on EN 61643-11);
5 low-voltage limiters.
Clauses 2 and 4 of this standard shall be read in conjunction with the documents mentioned in
1.2.
In particular clauses 4 to 8 and Annex B, Annex D and Annex E of EN 60099-1 are referred to
in clause 2 of EN 50123-5, unless explicitly otherwise indicated in this European Standard.

For gapless surge arresters and surge protective devices the appropriate portions of EN 60099-4
and EN 61643-11 respectively are quoted in clause 4 of this EN 50123-5, and apply.

NOTE 1  Only those clauses and subclauses which are modified in respect to the above-mentioned CENELEC and
IEC publications are mentioned in this document. The National Committees may copy the unchanged portions of the
IEC 60099 publications referred altering the type face as necessary.

NOTE 2  The numbering of this EN 50123-5 follows the following criteria:
- the first number identifies the five clauses of this standard;
- the remaining numbers, for clause 2 and clause 4, are taken unchanged from EN 60099-1 and EN 60099-4
respectively.
Annex A gives typical information required during enquiry and tenders. Annex B describes a
typical solution for high voltage filters against voltage surges.

1 Common matters
1.1  Scope
Clauses 1, 2, 3 and 4 of this European Standard cover particular requirements for surge arresters
(following named arresters) for specific use in fixed installations of d.c. traction systems. These
are surge arresters consisting of one or more non-linear resistors which may be in series with
single or multiple spark gaps.

Low-voltage limiters are covered under clause 5. These are protective devices mainly used in
fixed installations of d.c. traction systems to connect certain portions of the circuit, when, owing
to an abnormal situation, the voltage across the device exceeds a predetermined limited value.
They may be associated with other devices such as contactors for self-restoring arrangements.
They are not used in general to provide surge protection.

The following are the main uses of low-voltage limiters (LVL):
- connection to the rail of metallic masses;
- protection of rail circuits;
- earthing of rails in the substation;
- protection of cathodic circuits;
- protection of cable shields.

1.2  Normative references
This European Standard 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 only when
incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to
...