EN 50526-2:2014

Railway applications - Fixed installations - D.C. surge arresters and voltage limiting devices - Part 2: Voltage limiting devices

This European Standard applies to Voltage Limiting Devices (VLDs) to be applied in d.c. traction systems in order to comply with protective provisions against electric shock from d.c., and mixed a.c. – d.c. voltages, in accordance with the EN 50122 series, taking into account stray current provisions. VLDs operate in such a way as to connect the track return circuit of d.c. railway systems to the earthing system or to conductive parts within the overhead contact line zone or current collector zone.

Bahnanwendungen - Ortsfeste Anlagen - Überspannungsableiter und Spannungsbegrenzungseinrichtungen für Gleichspannungsnetze - Teil 2: Spannungsbegrenzungseinrichtungen

Diese Europäische Norm gilt für Spannungsbegrenzungseinrichtungen (VLD – en: voltage limiting device), die in Gleichstrom-Fahrleitungssystemen anzuwenden sind, um den Schutzmaßnahmen gegen elektrischen Schlag von Gleich- und Mischspannungen aus Wechsel- und Gleichspannungen nach EN 50122 unter Be-rücksichtigung der Bestimmungen für Streuströme zu entsprechen. Die Arbeitsweise von VLD ist derart, dass sie den Schienenrückleitungskreis des Gleichstrom-Bahnnetzes mit der Erdungsanlage oder leitfähigen Teile innerhalb des Oberleitungs- oder Stromabnehmerbereichs ver-binden.

Applications ferroviaires - Installations fixes - Parafoudres et limiteurs de tension pour systèmes à courant continu - Partie 2: Limiteurs de tension

La présente Norme Européenne concerne les appareils limiteurs de tension (VLD, Voltage Limiting Device) destinés à être appliqués aux réseaux de traction en courant continu afin de satisfaire aux dispositions de protection contre les chocs électriques des tensions continues et du mélange de tension alternative et de tension continue conformément à la série EN 50122, en tenant compte des dispositions concernant les courants vagabonds. Les VLD fonctionnent de telle manière à raccorder le circuit de retour de voie des réseaux ferroviaires en courant continu à un réseau de mise à la terre ou aux parties conductrices de la zone de la ligne aérienne de contact ou de la zone de collecteur de courant.

Železniške naprave - Stabilne naprave električne vleke - Enosmerni prenapetostni odvodniki in omejilniki napetosti - 2. del: Naprave za omejevanje napetosti

Ta evropski standard velja za naprave za omejevanje napetosti, ki se uporabljajo v enosmernih vlečnih sistemih, da se zagotovi skladnost zaščitnih ukrepov pred električnim udarom zaradi enosmerne ter mešane napetosti, v skladu s serijo standardov EN 50122 in ob upoštevanju ukrepov za blodeči tok. Naprave za omejevanje napetosti delujejo na tak način, da povežejo povratni tok proge enosmernih železniških sistemov z ozemljitvenim sistemom ali s prevodnimi deli v območju kontaktnih vodnikov ali sistema tokovnega odjema.

General Information

• Status: Published
• Publication Date: 27-Feb-2014
• Withdrawal Date: 29-Dec-2016
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• ICS: 29.280 - Electric traction equipment
• 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: 27-Mar-2024
• Ref Project: SIST EN 50526-2:2014 - Railway Applications - Fixed Installations - D.C. surge arresters and voltage limiting devices - Part 2: Voltage limiting devices

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2014
äHOH]QLãNHQDSUDYH6WDELOQHQDSUDYHHOHNWULþQHYOHNH(QRVPHUQLSUHQDSHWRVWQL
RGYRGQLNLLQRPHMLOQLNLQDSHWRVWLGHO1DSUDYH]DRPHMHYDQMHQDSHWRVWL
Railway Applications - Fixed Installations - D.C. surge arresters and voltage limiting
devices - Part 2: Voltage limiting devices
Bahnanwendungen - Ortsfeste Anlagen - Überspannungsableiter und
Niederspannungsbegrenzer - Teil 2: Spannungsbegrenze
Applications ferroviaires - Installations fixes - Parafoudres et limiteurs de tension - Partie
2:Limiteurs de tension
Ta slovenski standard je istoveten z: EN 50526-2:2014
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 50526-2
NORME EUROPÉENNE
February 2014
EUROPÄISCHE NORM
ICS 29.120.50; 29.280
English version
Railway applications -
Fixed installations -
D.C. surge arresters and voltage limiting devices -
Part 2: Voltage limiting devices

Applications ferroviaires -  Bahnanwendungen -
Installations fixes - Ortsfeste Anlagen -
Parafoudres et limiteurs de tension pour Überspannungsableiter und
systèmes à courant continu - Spannungsbegrenzungseinrichtungen -
Partie 2: Limiteurs de tension Teil 2:
Spannungsbegrenzungseinrichtungen

This European Standard was approved by CENELEC on 2013-12-30. 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, Former Yugoslav Republic of Macedonia, 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

CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2014 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50526-2:2014 E
Contents Page
Foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classes of VLD . 8
5 Characteristics and requirements of the VLDs . 9
5.1 Marking . 9
5.2 Service requirements . 9
5.2.1 Normal outdoor service conditions . 9
5.2.2 Normal indoor service conditions . 9
5.2.3 Abnormal service conditions . 10
5.3 General characteristics . 10
5.4 Minimum requirements . 10
5.4.1 Response time . 10
5.4.2 Additional requirements for VLDs of class 1 . 10
5.4.3 Additional requirements for VLDs of classes 3 and 4 . 10
5.5 Electrical characteristics and thermal rating . 11
5.6 Protection of VLDs against lightning . 11
5.7 Command and control (class 3 and 4 only) . 12
5.7.1 Local control . 12
5.7.2 Remote signalling . 12
5.7.3 Operation and alarm recordings . 12
6 Type tests . 13
6.1 General . 13
6.2 Nominal triggering voltage U and non-triggering voltage U . 14
Tn W
6.2.1 Procedure for welding shutspark gap VLDs (Class 1) . 14
6.2.2 Procedure for thyristor type VLDs (Class2) . 14
6.2.3 Procedure for mechanical switching VLDs and for combined thyristors with mechanical
switching devices VLDs (Class 3 and Class 4) . 15
6.3 Leakage current . 15
6.4 D.C. current withstand . 15
6.4.1 General . 15
6.4.2 Procedure to determine the rated current. 15
6.4.3 Procedure to determine short time withstand current . 16
6.5 A.C. current withstand characteristics (optional) . 17
6.6 Response time characteristics . 18
6.6.1 Response time for d.c. voltage . 18
6.6.2 Response time for combined a.c.-d.c. voltage . 20

- 3 - EN 50526-2:2014
6.7 Lightning current withstand characteristics for VLDs exposed to direct lightning strikes . 21
6.8 Recovery test (Class 3, 4) . 23
6.9 Reverse voltage test (Class 2.1) . 23
6.10 Dielectric tests for panel type voltage limiting devices (Class 3 and 4) . 24
6.10.1 Test conditions . 24
6.10.2 Power-frequency voltage withstand test. 24
6.11 Degree of protection. 24
6.12 Environmental tests for outdoor equipment . 25
6.13 Determination of minimum current for safe short circuiting of Class 1 VLDs . 25
7 Routine tests . 26
7.1 General . 26
7.2 VLDs of classes 3 and 4 . 26
7.3 Dielectric tests for panel type voltage limiting devices. 26
Annex A (informative) Preferred ranges of the principal properties of the VLDs . 27
Bibliography . 31

Figures
Figure 1  Test circuit for testing of response time . 19
Figure 2  TR evaluation. 19
Figure 3  Response time characteristic . 20
Figure 4 Test circuit for testing of response time T for combined a.c.-d.c. voltage . 21
R
Figure 5  Evaluation of response time T for combined a.c.-d.c voltage . 21
R
Figure 6  Circuit for the Recovery Voltage test . 23

Tables
Table 1  Classes of voltage-limiting device . 8
Table 2  Type tests . 13
Table 3  Maximum response time as a function of d.c. voltages . 18
Table 4  Maximum response time for combined a.c.-d.c. voltages . 20
Table A.1  Nominal Triggering voltage U . 27
Tn
Table A.2  Instantaneous Triggering Voltage U . 27
TI
Table A.3  Rated current I . 28
r
Table A.4  Short time withstand current I . 28
W
Table A.5  Leakage current I . 28
L
Table A.6  Making and breaking capacity . 28
Table A.7  Nominal lightning current (8/20 µs) I . 29
imp-n
Table A.8  High current impulse 8/20 μs and 4/10 μs I . 29
imp-high
Table A.9  High charge impulse I . 29
imp-hc
Table A.10  Current-time characteristic for safe short circuiting of Class 1 VLDs . 30

Foreword
This document (EN 50526-2:2014) 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:

(dop) 2014-12-30
• latest date by which this document
has to be implemented at national
level by publication of an identical
national
standard or by endorsement
(dow) 2016-12-30
• latest date by which the national
standards conflicting with this
document have to be withdrawn
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.

This European Standard, Railway applications — Fixed installations — D.C. surge arresters and voltage
limiting devices, is in three parts:
— Part 1: Surge arresters deals with metal oxide arresters without gaps for d.c. railway traction systems
(fixed installations) and is based on EN 60099-4, Ed
...