EN 62718:2016

Railway applications - Rolling stock - DC supplied electronic ballasts for lighting fluorescent lamps

IEC 62718:2013 specifies the performance and constructional requirements, and associated tests, for d.c. supplied electronic ballasts used to supply fluorescent lamps for lighting on railway rolling stock. Its requirements replace those of IEC 61347 for all railway rolling stock applications and specify and complete those of IEC 61347 for the specific needs of railway rolling stock applications.

Bahnanwendungen - Bahnfahrzeuge - Gleichstromversorgte elektronische Vorschaltgeräte für Leuchtstofflampen

Applications ferroviaires - Matériel roulant - Ballasts électroniques à courant continu pour lampes fluorescentes d'éclairage

La CEI 62718:2013 spécifie les exigences relatives à la construction et aux performances, et les essais correspondants, pour les ballasts électroniques alimentés en courant continu utilisés pour alimenter les lampes fluorescentes pour l'éclairage du matériel roulant ferroviaire. Ses exigences remplacent celles de la CEI 61347 pour toutes les applications sur le matériel roulant ferroviaire; elles précisent et complètent celles de la CEI 61347 pour les besoins spécifiques des applications ferroviaires.

Železniške naprave - Vozna sredstva - Elektronska bremena za fluorescenčne svetilke, napajane z enosmerno napetostjo

Standard IEC 62718:2013 določa zahteve glede lastnosti in konstrukcije ter povezane preskuse za elektronska bremena za fluorescenčne svetilke za osvetljevanje na železniških voznih sredstvih. Njegove zahteve nadomeščajo zahteve standarda IEC 61347 za vsa železniška vozna sredstva in dopolnjujejo zahteve standarda IEC 61347 za posebne potrebe pri železniških voznih sredstvih.

General Information

• Status: Published
• Publication Date: 07-Apr-2016
• Withdrawal Date: 07-Apr-2019
• ICS: 45.060 - Railway rolling stock
• Technical Committee: CLC/TC 9X - Electrical and electronic applications for railways
• Drafting Committee: CLC/SC 9XB - Electromechanical material on board rolling stock
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 08-Apr-2016
• Due Date: 11-Mar-2016
• Completion Date: 08-Apr-2016
• Ref Project: SIST EN 62718:2016 - Railway applications - Rolling stock - DC supplied electronic ballasts for lighting fluorescent lamps

Relations

• Replaces: EN 50311:2003 - Railway applications - Rolling stock - D.C. supplied electronic ballasts for lighting fluorescent lamps
• Effective Date: 29-Jan-2023

Overview

EN 62718:2016 (CLC / CENELEC adoption of IEC 62718:2013 + COR1:2016) specifies the performance, constructional requirements and associated tests for DC supplied electronic ballasts used to drive fluorescent lamps on railway rolling stock. It replaces EN 50311:2003 for railway lighting ballasts and completes/supersedes general lamp-controlgear rules (IEC 61347) for the specific needs of rail vehicles. The standard targets reliability, safety and electromagnetic compatibility for onboard lighting equipment.

Key topics and technical requirements

• Scope and classification of DC electronic ballasts for tubular and single-capped fluorescent lamps used on rolling stock.
• Constructional requirements: dimensions, wiring diagrams, terminals, provisions for repair, protection, inrush current limits and clearances/creepage distances.
• Performance requirements: ballast parameters matched to lamp characteristics, behavior under exceptional service conditions, and design features to ensure lamp starting and stable operation.
• Safety and insulation: dielectric tests, insulation coordination (clearance/creepage) referenced to IEC 62497-1, and conformity with general luminaires and controlgear safety requirements.
• Testing regime:
  • Type tests, routine tests, and investigatory tests covering electrical, thermal, endurance, environmental and dielectric performance.
  • Environmental and mechanical tests referenced (cold, dry heat, damp heat cyclic, shock and vibration per IEC 60068 and IEC 61373).
  • EMC considerations referenced through related railway EMC standards.
• Marking, documentation and instructions: required product information, identification, storage/installation/maintenance instructions for safe lifecycle use.
• Notable technical updates vs EN 50311:2003 include extension of some frequency-related values from “50 Hz” to “50 Hz or 60 Hz”, omission of the specific leakage current value (replaced by reference to IEC 60598-1), and referencing dielectric voltages to IEC 62497-1. A new informative Annex A addresses distance between lamp and metallic supports.

Applications and users

Who uses EN 62718:2016:

• Railway rolling stock manufacturers and system integrators specifying onboard lighting.
• Electronic ballast and lighting component manufacturers designing DC ballasts for trains, trams and metros.
• Test laboratories and certification bodies performing type and routine testing for compliance.
• Vehicle maintainers, procurement teams and safety engineers ensuring installed lighting meets rail-specific requirements.

Practical applications:

• Specifying compliant DC electronic ballasts for driver cabins, passenger saloons, vestibules and other on-board lighting circuits.
• Ensuring ballast designs meet shock, vibration, EMC and insulation requirements unique to rolling stock environments.

Related standards

• IEC 62718 / EN 62718:2016 (this document)
• IEC/EN 60571 (rolling stock electronic equipment)
• IEC 60598-1 (luminaires)
• IEC 61373 (shock and vibration)
• IEC 62497-1 (insulation coordination / clearances & creepage)
• EN 50121-3-2 (railway EMC apparatus)

Keywords: EN 62718:2016, DC electronic ballast, railway rolling stock, fluorescent lamp ballast, IEC 62718, railway lighting, ballast testing, insulation, dielectric test, EMC.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.UHVFHQþQHBahnanwendungen - Bahnfahrzeuge - Gleichstromversorgte elektronische Vorschaltgeräte für LeuchtstofflampenApplications ferroviaires - Matériel roulant - Ballasts électroniques à courant continu pour lampes fluorescentes d'éclairageRailway applications - Rolling stock - DC supplied electronic ballasts for lighting fluorescent lamps45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineering29.140.99Drugi standardi v zvezi z žarnicamiOther standards related to lampsICS:Ta slovenski standard je istoveten z:EN 62718:2016SIST EN 62718:2016en01-julij-2016SIST EN 62718:2016SLOVENSKI
STANDARDSIST EN 50311:20031DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62718
April 2016 ICS 45.060
Supersedes
EN 50311:2003
English Version
Railway applications - Rolling stock - DC supplied electronic ballasts for lighting fluorescent lamps (IEC 62718:2013
+ COR1:2016)
Applications ferroviaires - Matériel roulant - Ballasts électroniques à courant continu pour lampes fluorescentes d'éclairage (IEC 62718:2013
+ COR1:2016)
Bahnanwendungen - Bahnfahrzeuge - Gleichstromversorgte elektronische Vorschaltgeräte für Leuchtstofflampen (IEC 62718:2013
+ COR1:2016) This European Standard was approved by CENELEC on 2014-11-24. 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. 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 © 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62718:2016 E SIST EN 62718:2016

The following dates are fixed:
• latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-10-08 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-04-08
This document supersedes EN 50311:2003.
- Sections 8.2.1.3 and 9.3.2.7: the value is extended from “50 Hz” to “50 Hz or 60 Hz”; - Sections 8.2.3.1 and 9.3.4.1: the specified Level (0,7 mA) of leakage current in EN 50311:2003 is omitted, instead of it a reference to the standard (IEC 60598-1:2008, Section 10.3) is noted; - Section 9.3.2.8: Table 3 - Dielectric test voltage values are referenced to IEC 62497-1, this cause an extension of the nominal voltage levels; - Section 9.3.4.1: the values of R and C in Figure 3 (EN 50311:2003 R = 2 000
± 100
C = 112 nF ± 6 nF) are omitted; - new Annex A (informative): Distance between lamp an metallic support (before it was normative in Section 8.2.4.4 of EN 50311:2003); - Annex H from EN 50311:2003 is omitted.
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.
Endorsement notice The text of the International Standard IEC 62718:2013 was approved by CENELEC as a European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60068-1:1988 NOTE Harmonized as EN 60068-1:1994 1) (not modified). IEC 60081 NOTE Harmonized as EN 60081. IEC 60901:1996 NOTE Harmonized as EN 60901:1996 (not modified). IEC 60927 NOTE Harmonized as EN 60927. IEC 61347-2-7:2011 NOTE Harmonized as EN 61347-2-7:2012 (not modified). CISPR 15:2005 NOTE Harmonized as EN 55015:2006 2) (not modified). CISPR 15:2005/A1:2006 NOTE Harmonized as EN 55015:2006/A1:2007 2) (not modified).
1) Superseded by EN 60068-1:2014 (IEC 60068-1:2013): DOW = 2016-11-11. 2) Superseded by EN 55015:2013 (CISPR 15:2013 + IS1:2013 + IS2:2013): DOW= 2016-06-12. SIST EN 62718:2016

Normative references to international publications with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu
Publication Year Title EN/HD Year
IEC 60068-2-1 2007
Environmental testing -
Part 2-1: Tests - Test A: Cold EN 60068-2-1 2007
IEC 60068-2-2 2007
Environmental testing -
Part 2-2: Tests - Test B: Dry heat EN 60068-2-2 2007
IEC 60068-2-30 2005
Environmental testing -
Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle) EN 60068-2-30 2005
IEC 60077-1
(mod) 1999
Railway applications - Electric equipment for rolling stock -
Part 1: General service conditions and general rules EN 60077-1 2002
IEC 60417-DB -
Graphical symbols for use on equipment - -
IEC 60529 1989
Degrees of protection provided by enclosures (IP Code) EN 60529 +corr. May 1991 1993 IEC 60571 2012
Railway applications - Electronic equipment used on rolling stock EN 50155 + corr. May + AC 2007 2010 2012 IEC 60598-1
(mod) 2008
Luminaires -
Part 1: General requirements and tests EN 60598-1 A11 2008 3) 2009 3) IEC 60929 -
AC and/or DC-supplied electronic control gear for tubular fluorescent lamps - Performance requirements EN 60929 -
IEC 61140 -
Protection against electric shock - Common aspects for installation and equipment EN 61140 -
IEC 61347-1
(mod) 2007
Lamp controlgear -
Part 1: General and safety requirements EN 61347-1 2008 4) IEC 61347-2-3 - Lamp controlgear -
Part 2-3: Particular requirements for a.c. and/or d.c. supplied electronic control gear for fluorescent lamps EN 61347-2-3 -
3) Superseded by EN 60598-1:2015 (IEC 60598-1:2014): DOW = 2017-10-20. 4) Superseded by EN 61347-1:2015 (IEC 61347-1:2015): DOW = 2018-03-26. SIST EN 62718:2016

IEC 61373 -
Railway applications - Rolling stock equipment - Shock and vibration tests EN 61373 -
IEC 62236-3-2 2008 Railway applications - Electromagnetic compatibility -
Part 3-2: Rolling stock - Apparatus EN 50121-3-2 2006 IEC 62497-1 -
Railway applications - Insulation coordination -
Part 1: Basic requirements - Clearances and creepage distances for all electrical and electronic equipment EN 50124-1 -
IEC 62498-1 -
Railway applications - Environmental conditions for equipment -
Part 1: Equipment on board rolling stock EN 50125-1 -
IEC 62718 Edition 1.0 2013-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications – Rolling stock – DC supplied electronic ballasts for lighting fluorescent lamps
Applications ferroviaires – Matériel roulant – Ballasts électroniques à courant continu pour lampes fluorescentes d'éclairage INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE W ICS 45.060 PRICE CODE CODE PRIX ISBN 978-2-83220-752-9
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CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope . 7 2 Normative references . 7 3 Terms and definitions . 8 3.1 General terms . 8 3.2 Lamps and characteristics . 9 4 Classification . 10 5 Characteristics . 10 5.1 Rated voltages. 10 5.2 Overvoltages . 10 5.3 Type of fluorescent lamps . 10 6 Product information . 11 6.1 Nature of information . 11 6.1.1 General . 11 6.1.2 Identification . 11 6.1.3 Characteristics . 11 6.1.4 Other characteristics and information for installation. 11 6.2 Marking . 11 6.3 Instructions for storage, installation, operation and maintenance . 12 7 Normal service conditions . 12 8 Constructional and performance requirements . 12 8.1 Constructional requirements . 12 8.1.1 General . 12 8.1.2 Dimensions and wiring diagram . 12 8.1.3 Terminals . 12 8.1.4 Provisions for repair . 12 8.1.5 Clearance and creepage distances . 13 8.1.6 Protection . 13 8.1.7 Inrush current . 13 8.2 Performance requirements . 13 8.2.1 Electronic ballast parameters in accordance with lamps characteristics . 13 8.2.2 Exceptional conditions of use . 14 8.2.3 Electronic ballast design requirements . 15 8.2.4 Installation requirements . 16 8.3 Safety requirements . 17 9 Tests . 17 9.1 Test conditions . 17 9.1.1 Environmental conditions . 17 9.1.2 Other conditions . 18 9.2 Kinds of tests . 18 9.2.1 Type tests . 18 9.2.2 Routine tests . 19 9.2.3 Investigatory tests . 20 9.3 Verification of constructional and performance requirements . 20 SIST EN 62718:2016

62718 © IEC:2013 – 3 –9.3.1 General . 20 9.3.2 Sequence 1 . 20 9.3.3 Sequence 2 . 22 9.3.4 Sequence 3 . 24 9.3.5 Sequence 4 . 25 9.3.6 Sequence 5 . 27 Annex A (informative)
Distance between lamp and metallic support . 29 Annex B (informative)
Electronic ballast for lamps up to 40 W (case 1) . 30 Annex C (informative)
Electronic ballast for lamps up to 40 W (case 2) . 31 Annex D (informative)
Electronic ballast for lamps up to 15 W . 32 Annex E (informative)
Electronic ballast for lamps up to 20 W. 33 Annex F (informative)
Electronic ballast for lamps up to 10 W . 34 Annex G (informative)
Basic schematic diagrams . 35 Bibliography . 38
Figure 1 – Test circuit . 22 Figure 2 – Current limiting curve . 23 Figure 3 – Circuit for leakage current measurement . 24 Figure 4 – Circuit for test B: Cathode deactivated (rectifying effect) . 26 Figure B.1 – Overall dimensions for electronic ballast . 30 Figure C.1 – Overall dimensions for electronic ballast . 31 Figure D.1 – Overall dimensions for electronic ballast . 32 Figure E.1 – Overall dimensions for electronic ballast . 33 Figure F.1 – Overall dimensions for electronic ballast . 34 Figure G.1 – One or two tubular lamps . 35 Figure G.2 – One or two tubular lamps . 35 Figure G.3 – One or two tubular lamps . 36 Figure G.4 – One tubular lamp . 36 Figure G.5 – One tubular lamp . 36 Figure G.6 – One or two single capped lamps . 36 Figure G.7 – One single capped lamp . 37
Table 1 – Type tests . 19 Table 2 – Routine tests . 20 Table 3 – Dielectric test voltage values . 22
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INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
RAILWAY APPLICATIONS – ROLLING STOCK – DC SUPPLIED ELECTRONIC BALLASTS FOR LIGHTING FLUORESCENT LAMPS
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62718 has been prepared by IEC technical committee 9: Electrical equipment and systems for railways. This standard is based on EN 50311:2003. The text of this standard is based on the following documents: FDIS Report on voting 9/1769A/FDIS 9/1798/RVD
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. SIST EN 62718:2016

62718 © IEC:2013 – 5 –The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be
• reconfirmed, • withdrawn, • replaced by a revised edition, or • amended. The contents of the corrigendum of February 2016 have been included in this copy.
– 6 – 62718 © IEC:2013
INTRODUCTION This International Standard has been developed specifically for railway applications, to supplement the current standards. It covers general safety and performance requirements in addition to or in place of those contained in IEC 61347-1, IEC 61347-2-3 and 61347-2-7. NOTE 1 When applied unchanged, the clauses of IEC 61347 are either referred in this standard or introduced into it if they are short texts. NOTE 2 When a clause of IEC 61347 applies with changes or is replaced by more specific requirements, generally a short note explains the difference or the reason for that. SIST EN 62718:2016

62718 © IEC:2013 – 7 –RAILWAY APPLICATIONS – ROLLING STOCK – DC SUPPLIED ELECTRONIC BALLASTS FOR LIGHTING FLUORESCENT LAMPS
1 Scope This International Standard specifies the performance and constructional requirements, and associated tests, for d.c. supplied electronic ballasts used to supply fluorescent lamps for lighting on railway rolling stock. Its requirements replace those of IEC 61347 for all railway rolling stock applications and specify and complete those of IEC 61347 for the specific needs of railway rolling stock applications. This international standard applies to electronic ballasts – supplying pre-heated cathode fluorescent lamps without integrated starters, tubular or single capped, according to IEC 60081 and IEC 60901 respectively, – having a single and non adjustable luminous flux level. It does not apply to electronic ballasts supplying non pre-heated cathode lamps and/or lamps with integrated starters. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic (12h + 12h cycle) IEC 60077-1:1999, Railway applications – Electric equipment for rolling stock – Part 1: General service conditions and general rules IEC 60417, Graphical symbols for use on equipment – Available from:http/www.graphical-symbols.info/equipment IEC 60529:1989, Degrees of protection provided by enclosures (IP code)1 IEC 60571:2012, Railway applications – Electronic equipment used on rolling stock IEC 60598-1:2008, Luminaries – Part 1: General requirements and tests IEC 60929, AC and/or DC-supplied electronic control gear for tubular fluorescent lamps – Performance requirements IEC 61140, Protection against electric shock – Common aspects for installation and equipment
There is a consolidated edition 2.1 (2001), comprising edition 2 (1989) and Amendment 1 (1999). SIST EN 62718:2016

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NOTE IEC 60536 was replaced by IEC 61140. IEC 61347-1:2007, Lamp controlgear – Part 1: General and safety requirements2 IEC 61347-2-3, Lamp controlgear – Part 2-3: Particular requirements for a.c. and d.c. supplied electronic controlgear for fluorescent lamps IEC 61373, Railway applications – Rolling stock equipment – Shock and vibration tests IEC 62236-3-2:2008, Railway applications – Electromagnetic compatibility – Part 3-2: Rolling stock – Apparatus IEC 62497-1, Railway applications – Insulation coordination – Part 1: Basic requirements – Clearances and creepage distances for all electrical and electronic equipment IEC 62498-1, Railway applications – Environmental conditions for equipment – Part 1: Equipment on board rolling stock 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 General terms 3.1.1
nominal value a suitable approximate quantity value used to designate or identify a characteristic of a component, device or equipment [SOURCE: IEC 60050-811:1991, 811-11-01] 3.1.2
rated value a quantity value assigned, generally by a manufacturer, for a specified operating condition of a component, device or equipment [SOURCE: IEC 60050-811:1991, 811-11-02] 3.1.3
voltage range
range of supply voltage over which the electronic ballast is intended to be operated [SOURCE: IEC 61347-1:2007, 3.8] 3.1.4
rated voltage voltage declared by the manufacturer to which all the electronic ballast characteristics are related and which is not less than 85 % of the maximum value of the rated voltage range Note 1 to entry: The term « rated voltage » generally used in railway applications has been preferred to « design voltage » defined in 3.7 of IEC 61347-1:2007.
There is a consolidated edition 2.2 (2012), comprising edition 2 (2007), Amendment 1 (2010) and Amendment 2 (2012). SIST EN 62718:2016

62718 © IEC:2013 – 9 –3.1.5
rated maximum operating temperature of a ballast case tc highest permissible temperature which may occur on the outer surface (at the indicated place, if marked) under normal operating conditions and at the rated voltage or maximum of the rated voltage range 3.1.6
type test a test of one or more devices made to a certain design to show that the design meets certain specifications [SOURCE: IEC 60050-811:1991, 811-10-04] 3.1.7
routine test a test to which each individual device is subjected during or after manufacture to ascertain whether it complies with certain criteria [SOURCE: IEC 60050-811:1991, 811-10-05] 3.1.8
sampling test a test on a number of devices taken at random from a batch [SOURCE: IEC 60050-811:1991, 811-10-06] 3.1.9
investigation test a special test of an optional character carried out in order to obtain additional information [SOURCE: IEC 60050-811:1991, 811-10-07] 3.1.10
exposed conductive part any metallic or other form of conductive material which is not energised except in case of failure, and which may be accessible to touch [SOURCE: IEC 61991:2000, 3.2.8] 3.1.11
protective bonding equipotential connection for protective purpose [SOURCE: IEC 61991:2000, 3.2.17] 3.2 Lamps and characteristics 3.2.1
d.c. supplied electronic ballast electronic ballast d.c. to a.c. inverter using semi-conductor devices which may include stabilising elements for supplying power to one or more fluorescent lamps Note 1 to entry: For the purposes of this standard d.c. supplied electronic ballast includes starter and ballast functions. Note 2 to entry: The term « electronic ballast » is more commonly used than d.c. supplied electronic ballast and will be used in this standard. [SOURCE: IEC 61347-1:2007, 3.2.1] SIST EN 62718:2016

– 10 – 62718 © IEC:2013
3.2.2
started fluorescent lamp a fluorescent lamp when a current is crossing the space between the two cathodes 3.2.3
lighted fluorescent lamp a fluorescent lamp emitting light that can be observed visually, uniformly distributed within the space between the two cathodes. A lamp is not lighted when the light emitted is only localised around the cathodes 3.2.4
extinguished fluorescent lamp a fluorescent lamp emitting no light, when visually observed Note 1 to entry: A lamp which emits light around the cathode(s) is not considered as extinguished. 3.2.5
switching cycle the complete power cycle between extinguished, started, lighted and extinguished states 4 Classification Electronic ballasts are classified according to parameters determined by the performance required and the mechanical characteristics. These parameters which may be chosen or specified by the purchaser are the following: – nominal supply voltage; – number and type (power) of lamps; – temperature operating class; – bare or housed ballast; – size and fixations; – wiring diagram; – type of terminals. Other requirements (e.g. special length cables, burn-in, etc.) shall be defined by the purchaser. 5 Characteristics 5.1 Rated voltages Rated voltages and rated voltage ranges are defined in IEC 60571. For maintenance of existing rolling stock, other nominal voltage values and widened ranges should be agreed between user and manufacturer. 5.2 Overvoltages Electronic ballasts shall withstand supply overvoltages as defined in IEC 60571. 5.3 Type of fluorescent lamps The manufacturer shall declare the types of lamps for which the ballast is designed and, from these types, those which shall be considered as reference for design and used for testing the ballast. SIST EN 62718:2016

62718 © IEC:2013 – 11 –6 Product information 6.1 Nature of information 6.1.1 General The following information, which includes that required by IEC 61347-2-3 when appropriate, shall be given by the manufacturer. 6.1.2 Identification – manufacturer’s name or trademark; – mode number or type reference of the manufacturer; – modification status given by letters or figures (e.g. A, B, C, etc., to tick off). 6.1.3 Characteristics – rated voltage and voltage range; – all possible wiring diagrams showing and identifying the terminals; – open circuit voltage; – temperature operating class; Temperature operating class has been preferred to rated maximum operating temperature (tc), see 8.2.1.5. – symbol for earthing (protective bonding to the car body) as applicable; graphic symbol
IEC 60417–5019(2012-11); – reference to this standard (instead of category defined in Clause 6 of IEC 61347-1:2007); – type and nominal value of replaceable fuse, if any. 6.1.4 Other characteristics and information for installation In addition to the above mandatory markings, the following information, if applicable, shall be given either on the electronic ballast or be made available in the manufacturer’s catalogue or the like: – nominal working frequency of lamp operation and its range; – mechanical characteristics; – weight; – installation recommendation such as • type of cable and wiring between electronic ballast and lamp, • type of terminals, etc. – rated input withstand voltage; – supplementary information if required. 6.2 Marking All relevant information, as detailed in 6.1.2 and 6.1.3, shall be marked on the nameplate, away from the base plate and preferably on top of the electronic ballast. Marking shall be indelible and easily legible. Test of compliance is described in 7.1 of IEC 61347-1:2007. The symbol for earthing (protective bonding) shall be marked as close as possible to the earth terminal or one of the bolted fixation, if they are used as such. It may be marked away from the nameplate but shall not be marked on screws or other easily removable parts. It shall be visible after installation. SIST EN 62718:2016

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For traceability, markings shall also contain at least one of the following: – the manufacturing serial number; – the manufacturing date; – the code of manufacturing. It is preferred that all markings are placed on a nameplate. The nameplate shall not be conductive, if only stuck. 6.3 Instructions for storage, installation, operation and maintenance Only instructions needed to comply with the requirements shall be given by the manufacturer. Any other instructions are at the manufacturer’s discretion. 7 Normal service conditions Where relevant, requirements of IEC 60571, which refers to IEC 62498-1, shall apply. 8 Constructional and performance requirements 8.1 Constructional requirements 8.1.1 General Construction shall comply with the constructional requirements given in IEC 60571, where relevant, with the following additions. 8.1.2 Dimensions and wiring diagram For maintenance purposes and in order to achieve interchangeability with existing units, it is recommended that the electronic ballasts comply with dimensions and wiring diagrams given in one of the informative Annexes B to G, depending on the type of unit. Electronic ballasts without housing shall comply with the requirements agreed between the purchaser and the manufacturer. 8.1.3 Terminals Type of terminals to be provided for the ballasts may be chosen by the purchaser. Screws, current-carrying parts and mechanical connections shall comply with the requirements of Clause 8 and Clause 17 of IEC 61347-1:2007 when appropriate. Electronic ballasts without housing shall comply with the requirements agreed between the purchaser and the manufacturer. 8.1.4 Provisions for repair Unless the electronic ballast unit is the agreed lowest replaceable unit for repairing, electronic ballast shall be designed such that all necessary access for diagnosis and repair is possible without damage or undue deterioration to the components or wiring. The enclosure shall provide the necessary protection against the environmental influences. It shall be possible to dismantle and repair or replace the components.
62718 © IEC:2013 – 13 –8.1.5 Clearance and creepage distances Clearance and creepage distances shall comply with IEC 62497-1 considering – pollution degree PD1 for housed printed circuit board and PD2 for external parts, – overvoltage category OV2. The values shall not be lower than those required by Clause 16 of IEC 61347-1:2007. 8.1.6 Protection In order to maintain operability of the lighting equipment, the electronic ballast shall isolate itself from the circuit in case of an internal short-circuit and may include, for example – either a calibrated fuse fitted as a replaceable component, – or three printed tracks used as fuses which can be changed over during repair; then they shall not be used to protect against incorrect connection of polarity (see 8.2.2.2). The protection calibration shall be, in case of short-circuit, such that the peak current value is limited to 20 times the continuous current Ir at the rated voltage. The general protection value of the lighting circuit, chosen by the customer, should be at least equal to 25 times the current absorbed by one electronic ballast. 8.1.7 Inrush current The peak inrush current which may occur at the time of switch-on, measured in specified conditions of low impedance source, shall be less than 20 times the continuous current Ir of the electronic ballast supplied at the rated voltage. Before 1,5 ms, the current shall be at its permanent value. A more restrictive limit of inrush current may be specified by the customer. 8.2 Performance requirements 8.2.1 Electronic ballast parameters in accordance with lamps characteristics 8.2.1.1 General All requirements given hereinafter are only applicable for appropriate type(s) of lamp(s) for which the electronic ballast is designed, and the characteristics which comply with the requirements of their relevant standard. 8.2.1.2 Current wave form supplied to lamps The current wave form supplied to the lamps shall be such that the electronic ballast complies with the electromagnetic compatibility requirements (see 8.2.3.4). In any case the ratio between the peak value and the r.m.s value shall not exceed 1,7. NOTE In Japan, a crest factor of 2,1 maximum is permitted, when additional cathode heating is applied. 8.2.1.3 Luminous flux – Luminance At the ambient air temperature of 22 °C ± 5 K, the lamp supplied by the electronic ballast at the rated voltage shall emit a luminous flux at least equal to those emitted by the same lamp supplied by any 50 Hz or 60 Hz a.c. reference ballast as defined in IEC 61347-1, the voltage of which being set to obtain the nominal power in the lamp. SIST EN 62718:2016

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8.2.1.4 Efficiency At the ambient air temperature of 22 °C ± 5 K, the power supplied to the lamp(s) by the electronic ballast at the rated voltage shall be at least equal to 0,75 time the power absorbed by the electronic ballast input. 8.2.1.5 Frequency The operating frequency shall be at least 18 kHz, irrespective of the working conditions considered as possible in this standard. If needed to avoid EMC problems, the purchaser can either fix on special request the frequency range in which the electronic ballast operates or exclude a special frequency range. 8.2.1.6 Temperature The electronic ballast shall withstand, without requiring any additional heat sink, the whole temperature range for which it is designed irrespective of the supply voltage within the rated voltage range. The electronic ballast shall start the lamp for all temperatures equal to or higher than –5 °C irrespective of the applied supply voltage within the rated voltage range. In addition, for operating classes T2 and TX, the electronic ballast shall start the lamp at temperatures equal to or higher than –25 °C irrespective of the applied supply voltage between the nominal voltage and the maximum voltage. No damage shall occur to electronic ballast or to the lamp(s) at temperatures outside the range required for lamp starting. Reduced lighting performance is accepted when the temperature around the lamp is less than –5 °C. 8.2.2 Exceptional conditions of use 8.2.2.1 General In addition to normal conditions of use, electronic ballasts are required to endure the following exceptional conditions without any damage to the electronic ballasts or to the lamps. 8.2.2.2 Polarity reversal protection Electronic ballasts shall be provided with protection against an incorrect polarity of the supply voltage at the input terminals. A continuous supply with incorrect polarity shall not damage the unit. During this period the electronic ballast shall withstand the overvoltage requirements without failure. If any fuses are allowed to be blown then the fuse shall be replaceable without removing the electronic ballast. Following the correct polarity connection and the replacement of the fuse, the electronic ballast shall operate properly. 8.2.2.3 Changing of lamps Electronic ballasts shall be able to withstand the effects of removing one or more lamps, at any voltage within the rated voltage range. They shall be able to light one or more new lamps, as soon as fitted, at the minimum temperature of 15 °C and at the rated voltage. At lower temperature and voltage values, the lighting of the new lamp may require a new switching cycle. SIST EN 62718:2016

62718 © IEC:2013 – 15 –8.2.2.4 Abnormal function of the lamp Electronic ballasts shall be able to withstand the effects of any failure of a lamp or lamps such as – non-lighting of one or more lamps, – lamps with one or both filaments cut, – abnormal variation of filament resistance, – lamps functioning as a diode. 8.2.2.5 Output voltage without lamps Independent of either being on load or off load, the insulation of cables connecting the lamps to the ballast shall not be exposed to excessive dielectric stress. At the rated voltage and 5 s after switching on, electronic ballasts peak voltages between any cable and car body shall be less than 800 V. 8.2.2.6 Short-circuit Electronic ballasts shall be able to withstand short-circuits of every filament. 8.2.2.7 Gradually decreasing supply voltage The electronic ballasts shall not be damaged when the supply falls or remains below the lowest limit value of the rated voltage range, irrespective of the rate of the decreasing voltage. 8.2.2.8 Pre-heating current The electronic ballasts shall allow short-term cycles of lighting/extinguishing without shortening lamp working lives. This shall be achieved with a time delay for the starting process including the time which is required to heat the filaments before starting or an equivalent system. The limiting values of effective heating current shall comply with the requirements of IEC 60929. 8.2.3 Electronic ballast design requirements 8.2.3.1 Leakage current The leakage current between each input connection and metallic housing, measured in specified conditions, shall not exceed the limit stated in 10.3 of IEC 60598-1:2008. 8.2.3.2 Ripple factor of input current The ripple factor of the current measured according to the conditions of 9.3.3.2 shall not be greater than 10 %. Ripple factor of the current is calculated as (%) = )()(100minmaxminmaxIIII+−×. 8.2.3.3 Ripple factor of input voltage Due to battery charging, the d.c. supply voltage has a pulsating voltage. The electronic ballast shall operate from a supply voltage affected by a ripple factor not greater than 15 %. Ripple factor of a voltage is calculated as (%) = )()(100minmaxminmaxUUUU+−×. SIST EN 62718:2016

– 16 – 62718 © IEC:2013 8.2.3.4 Electromagnetic compatibility (EMC) Emission and immunity requirements apply to the electronic ballast including wiring and lamps as recommended by the manufacturer. Therefore, radio disturbance characteristics shall be considered on the complete electrical lighting equipment (luminaries). Emission shall comply with Clause 7 of IEC 62236-3-2:2008 considering Table 4 and Table 6 limits. In addition Table 3 limits apply to the output when the electronic ballast is considered alone. Immunity shall comply with Clause 8 of IEC 62236-3-2:2008 considering Table 7 and Table 9 limits. 8.2.3.5 Magnetic effects Electronic ballasts shall be designed to be fastened on a metal plate. Additionally, any metallic part installed at distance of 25 mm or more from the electronic ballast shall not have any influence on its performance. NOTE Electronic ballasts may be installed at distances of less than 25 mm from a metallic part if, after manufacturer’s agreement, it has been proven that there is no influence on performance. 8.2.3.6 Predicted reliability Where a reliability level is required, then IEC 60571 applies. The component reliability data shall be agreed between the manufacturer and the purchaser at the time of tender and the calculation shall be based on ground mobile environmental operation and on ambient temperature of 40 °C. 8.2.3.7 Burn-in The standard does not deal with burn-in. At the time of tender, the purchaser may require from the manufacturer to submit electronic ballasts to a systematic burn-in process at the end of the manufacturing process. The burn-in test should reflect the specified operating conditions. 8.2.4 Installation requirements 8.2.4.1 General All performance deterioration due to the installation and which are not covered by the following requirements of this standard shall be subject of a special agreement. 8.2.4.2 Quality of cables
The purchaser shall verify that the cable used between electronic ballast and lamps can withstand the output voltage wi
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