EN 50526-1:2012

SLOVENSKI STANDARD
01-marec-2012
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SIST EN 50123-5:2003
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Railway applications - Fixed installations - D.C. surge arresters and voltage limiting
devices - Part 1: Surge arresters
Bahnanwendungen - Ortsfeste Anlagen - Überspannungsableiter und
Niederspannungsbegrenzer - Teil 1: Überspannungsableiter
Applications ferroviaires - Installations fixes - Parafoudres et limiteurs de tension pour
systèmes à courant continu - Partie 1: Parafoudres
Ta slovenski standard je istoveten z: EN 50526-1:2012
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
29.280 (OHNWULþQDYOHþQDRSUHPD Electric traction equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50526-1
NORME EUROPÉENNE
January 2012
EUROPÄISCHE NORM
ICS 29.120.50; 29.280 Supersedes EN 50123-5:2003

English version
Railway applications -
Fixed installations -
D.C. surge arresters and voltage limiting devices -
Part 1: Surge arresters
Applications ferroviaires -  Bahnanwendungen -
Installations fixes - Ortsfeste Anlagen -
Parafoudres et limiteurs de tension pour Überspannungsableiter und
systèmes à courant continu - Niederspannungsbegrenzer -
Partie 1: Parafoudres Teil 1: Überspannungsableiter

This European Standard was approved by CENELEC on 2011-10-10. 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland, Turkey 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

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50526-1:2012 E
Contents
Foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Characteristics . 12
4.1 Marking . 12
4.2 Service conditions . 12
4.3 Requirements . 13
5 Arrester classification . 14
6 Type test . 14
6.1 General . 14
6.2 Insulation withstand tests on the arrester housing . 15
6.3 Residual voltage tests . 16
6.4 Charge transfer test . 17
6.5 Operating duty tests . 19
6.6 Short-circuit tests . 24
6.7 Internal partial discharge tests . 27
6.8 Bending moment test . 28
6.9 Seal leak rate test . 33
6.10 Environmental tests . 35
7 Routine tests and acceptance tests . 36
7.1 Routine tests . 36
7.2 Acceptance tests . 37
Annex A (normative) Flowchart of testing procedure of bending moment . 38
Annex B (normative) Direct lightning current impulse withstand test . 39

Bibliography . 40
Figures
Figure 1 – Impulse current – Rectangular . 18
Figure 2 – Power losses of the metal-oxide resistor at elevated temperatures versus time . 20
Figure 3 – Circuit layout for short-circuit test (all leads and venting systems in the same plane) . 25
Figure 4 – Example of a test circuit for re-applying pre-failing immediately before applying the short-
circuit test current . 27
Figure 5 – Thermomechanical preconditioning . 30
Figure 6 – Example of the arrangement for the thermo-mechanical preconditioning and directions of the
cantilever load . 31
Figure 7 – Water immersion test . 32
Figure 8 – Definition of mechanical loads (base load = SSL) . 33
Figure 9 – Surge arrester unit . 34
Figure A.1 – Flowchart of testing procedure of bending moment . 38
Tables
Table 1 – Arrester classification . 14
Table 2 – Type tests . 15
Table 3 – Peak currents for switching impulse residual voltage test . 17
Table 4 – Parameters for the charge transfer test . 18
Table 5 – Determination of elevated continuous operating voltage . 21

– 3 – EN 50526-1:2012
Table 6 – Test procedure of operating duty test . 22
Table 7 – Requirements for high current impulses . 23
Table 8 – Required currents for short-circuit tests . 25
Table B.1 – Parameters for the direct lightning impulse . 39

Foreword
This document (EN 50526-1:2012) has been 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.
The following dates are fixed:
• latest date by which this document has
(dop) 2012-10-10
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national
(dow) 2014-10-10
standards conflicting with this
document have to be withdrawn
This document supersedes EN 50123-5:2003.
The existing standard EN 50123-5:2003 covers the case of the old technologies of the gapped arresters with
SiC resistors and of the low voltage limiters (LVL) with gaps. These technologies at present are superseded.
The present standard deals with the new technologies of the gapless metal-oxide arresters and of the LV
limiters for application in the electric railway d.c. fixed installations. Guidance for selection and application of
SA and LVL is missing in the old standard while it is added in the third part of the new standard.
As there is no standard available at the moment for surge arrester on rolling stock it seems convenient for
the WG to note that the same electrical requirements apply for arresters on rolling stock, taking into account
other specific requirements.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
__________
– 5 – EN 50526-1:2012
Introduction
This European Standard is in three parts:
- Part 1 deals with metal-oxide arresters without gaps for d.c. railway traction systems (fixed installations)
and is based on EN 60099-4:2004 + A1:2006 + A2:2009;
- Part 2 deals with voltage limiting devices for specific use in d.c. railway traction systems (fixed
installations);
- Part 3 deals with a Guide of application of metal-oxide arresters and of voltage limiting devices.

1 Scope
This European Standard applies to non-linear metal-oxide resistor type surge arresters without spark gaps
designed to limit voltage surges on d.c. systems with nominal voltage up to 3 kV.
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 50124-1:2001, Railway applications – Insulation coordination – Part 1: Basic requirements – Clearances
and creepage distances for all electrical and electronic equipment
EN 50125-2:2002, Railway applications – Environmental conditions for equipment – Part 2: Fixed electrical
installations
EN 60060-1:2010, High-voltage test techniques - Part 1: General definitions and test requirements
(IEC 60060-1:2010)
EN 60270:2001, High-voltage test techniques – Partial discharge measurements (IEC 60270:2000)
EN 61109:2008, Insulators for overhead lines – Composite suspension and tension insulators for a.c.
systems with a nominal voltage greater than 1 000 V – Definitions, test methods and acceptance criteria
(IEC 61109:2008)
EN ISO 4287:1998, Geometrical Product Specifications (GPS) - Surface texture: Profile method - Terms,
definitions and surface texture parameters (ISO 4287:1997)
EN ISO 4892-1:2000, Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance
(ISO 4892-1:1999)
EN ISO 4892-2:2006, Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps
(ISO 4892-2:2006)
EN ISO 4892-3:2006, Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent
UV lamps (ISO 4892-3:2006)
– 7 – EN 50526-1:2012
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
nominal voltage U
n
designated value for a system
...