IEC 61991:2019
(Main)Railway applications - Rolling stock - Protective provisions against electrical hazards
Railway applications - Rolling stock - Protective provisions against electrical hazards
IEC 61991:2019 defines requirements applied in the design and manufacture of electrical installations and equipment to be used on rolling stock to protect persons from electric shocks. This document is applicable to rolling stock of rail transport systems, road transport systems if they are powered by an external supply (e.g. trolley buses), magnetically levitated transport systems, and to the electrical equipment installed in these systems. This second edition cancels and replaces the first edition, published in 2000. It is based on EN 50153:2014. This edition includes the following significant technical changes with respect to the previous edition:
a) replacement of several reference standards.
b) several terms and abbreviated terms are introduced;
c) special national conditions are included in annex
Applications ferroviaires - Matériel roulant - Dispositions de protection contre les dangers électriques
L'IEC 61991:2019 définit les exigences appliquées, dans la conception et la fabrication des installations et équipements électriques à utiliser sur le matériel roulant, pour la protection des personnes contre les chocs électriques. Le présent document est applicable aux matériels roulants des systèmes de transport sur rails, aux systèmes de transport routier, s'ils sont alimentés par une source extérieure (trolleybus), aux systèmes de transport à sustentation magnétique et aux équipements électriques installés dans ces systems. Cette deuxième édition annule et remplace la première édition, publiée en 2000. Elle est basée sur l’EN 50153:2014. Cette édition inclut les changements techniques significatifs suivants par rapport à l’édition précédente:
a) remplacement de plusieurs références de normes.
b) ajout de plusieurs termes et termes abrégés.
c) conditions nationales particulières est donnée en annexe
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IEC 61991 ®
Edition 2.0 2019-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Rolling stock –
Protective provisions against electrical hazards
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 61991 ®
Edition 2.0 2019-05
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Rolling stock –
Protective provisions against electrical hazards
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 45.060.01 ISBN 978-2-8322-6931-2
– 2 – IEC 61991:2019 RLV © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.1.1 Definitions concerning persons involved . 9
3.1.2 Other definitions . 9
3.2 Abbreviated terms . 13
4 Classification of voltage bands . 13
4.1 General principles . 13
4.2 Connections between circuits . 14
4.3 Exceptions . 15
5 Protective provisions against direct contact . 15
5.1 General . 15
5.2 Protection by insulation . 15
5.3 Protection by prevention of access . 16
5.3.1 Voltages in bands I to III . 16
5.3.2 Voltages in band IV . 17
5.4 Protection by the use of band I(ELV) . 18
5.4.1 Requirements for systems of band I (SELV and PELV) . 18
5.4.2 Additional requirements for SELV . 19
5.4.3 Additional requirements for PELV . 19
5.5 Warning labels . 19
6 Protective provisions against indirect contact . 19
6.1 General . 19
6.2 Protective bonding . 20
Equipotential connections .
6.2.1 General . 20
6.2.2 Equipotential bond . 20
6.2.3 Protective bonding rating . 20
6.2.4 Sliding contacts . 20
6.3 Disconnection of the supply . 20
6.3.1 Application . 20
6.3.2 Disconnection characteristic . 21
6.4 Vehicle Main protective bonding. 21
6.4.1 General . 21
6.4.2 Bonding paths . 21
6.4.3 Impedance . 22
6.4.4 Contact line fault . 22
6.5 Clarifications and exceptions with reference to indirect contact . 23
6.5.1 Parts requiring protective provisions . 23
6.5.2 Parts not requiring protective provisions . 23
6.5.3 Multi-stage insulation . 23
6.5.4 Floating supplies . 23
6.5.5 Insulated wheel or levitation systems without a protective conductor . 24
6.6 Additional requirements – Bearings . 24
7 Power circuit . 24
7.1 General principles . 24
7.2 Power circuit insulated from the vehicle body or bogie . 25
7.3 Power circuit using the vehicle body or bogie . 25
8 Additional requirements . 25
8.1 General . 25
8.2 Current collectors . 25
8.3 Capacitors . 26
8.4 Plug and socket devices . 26
8.4.1 Portable apparatus . 26
8.4.2 Vehicle and intervehicle connectors . 27
8.5 Special sources . 27
8.5.1 General . 27
8.5.2 Live parts not requiring protective provisions . 27
8.5.3 Live parts requiring protective provisions . 27
Annex A (normative) List of items where contracting parties shall choose
either a procedure or a mechanical device co-operate . 28
Annex B (informative) Special national conditions . 29
B.1 General . 29
B.2 France . 29
B.3 Great Britain . 29
B.3.1 Operate over 750 V DC third rail electrified lines . 29
B.3.2 Bonding between rail vehicle main body to bogie . 29
B.3.3 Intervehicle bonding . 30
B.4 Japan. 30
B.4.1 General . 30
B.4.2 [6.4.4] Contact line fault . 30
B.4.3 [8.4.1] Portable apparatus . 30
Annex C (informative) Example solutions for impedance management in electric
multiple units (EMUs) . 31
C.1 Preventing absorption of return current in EMUs . 31
C.2 Examples of solutions . 32
Bibliography . 33
Figure C.1 – Concentration of return current . 31
Figure C.2 – Attach earth resistors for long-length EMUs preventing current absorption . 31
Table 1 – Voltage bands . 14
Table 2 – Maximum impedance between each vehicle body of a unit and protective
conductor of the fixed installation . 22
Table B.1 – Voltage bands . 29
– 4 – IEC 61991:2019 RLV © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS – ROLLING STOCK –
Protective provisions against electrical hazards
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
agreeme
...
IEC 61991 ®
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Rolling stock –
Protective provisions against electrical hazards
Applications ferroviaires – Matériel roulant –
Dispositions de protection contre les dangers électriques
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary
details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and
once a month by email. French extracted from the Terms and Definitions clause of
IEC publications issued since 2002. Some entries have been
IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC
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Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
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IEC 61991 ®
Edition 2.0 2019-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Rolling stock –
Protective provisions against electrical hazards
Applications ferroviaires – Matériel roulant –
Dispositions de protection contre les dangers électriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 45.060.01 ISBN 978-2-8322-6596-3
– 2 – IEC 61991:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.1.1 Definitions concerning persons . 8
3.1.2 Other definitions . 8
3.2 Abbreviated terms . 12
4 Classification of voltage bands . 12
4.1 General principles . 12
4.2 Connections between circuits . 13
4.3 Exceptions . 13
5 Protective provisions against direct contact . 14
5.1 General . 14
5.2 Protection by insulation . 14
5.3 Protection by prevention of access . 14
5.3.1 Voltages in bands I to III . 14
5.3.2 Voltages in band IV . 15
5.4 Protection by the use of band I (ELV) . 16
5.4.1 Requirements for systems of band I (SELV and PELV) . 16
5.4.2 Additional requirements for SELV . 16
5.4.3 Additional requirements for PELV . 16
5.5 Warning labels . 16
6 Protective provisions against indirect contact . 17
6.1 General . 17
6.2 Protective bonding . 17
6.2.1 General . 17
6.2.2 Equipotential bond . 17
6.2.3 Protective bonding rating . 17
6.2.4 Sliding contacts . 18
6.3 Disconnection of the supply . 18
6.3.1 Application . 18
6.3.2 Disconnection characteristic . 18
6.4 Main protective bonding . 18
6.4.1 General . 18
6.4.2 Bonding paths . 18
6.4.3 Impedance . 19
6.4.4 Contact line fault . 20
6.5 Clarifications and exceptions with reference to indirect contact . 20
6.5.1 Parts requiring protective provisions . 20
6.5.2 Parts not requiring protective provisions . 20
6.5.3 Multi-stage insulation . 20
6.5.4 Floating supplies . 21
6.5.5 Insulated wheel or levitation systems without a protective conductor . 21
6.6 Additional requirements – Bearings . 21
7 Power circuit . 21
7.1 General principles . 21
7.2 Power circuit insulated from the vehicle body or bogie . 22
7.3 Power circuit using the vehicle body or bogie . 22
8 Additional requirements . 22
8.1 General . 22
8.2 Current collectors . 22
8.3 Capacitors . 22
8.4 Plug and socket devices . 23
8.4.1 Portable apparatus . 23
8.4.2 Vehicle and intervehicle connectors . 23
8.5 Special sources . 24
8.5.1 General . 24
8.5.2 Live parts not requiring protective provisions . 24
8.5.3 Live parts requiring protective provisions . 24
Annex A (normative) List of items where contracting parties shall co-operate . 25
Annex B (informative) Special national conditions . 26
B.1 General . 26
B.2 France . 26
B.3 Great Britain . 26
B.3.1 Operate over 750 V DC third rail electrified lines . 26
B.3.2 Bonding between rail vehicle main body to bogie . 26
B.3.3 Intervehicle bonding . 27
B.4 Japan. 27
B.4.1 General . 27
B.4.2 [6.4.4] Contact line fault . 27
B.4.3 [8.4.1] Portable apparatus .
...
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