IEC 63076:2019

Railway applications - Rolling stock - Electrical equipment in trolley buses - Safety requirements and current collection systems

IEC 63076:2019 applies to electrical systems aboard vehicles of the trolley bus type, as defined in 3.1, fed with a nominal line voltage (Un) between 600 V DC and 750 V DC. This document defines the requirements and constructional advice, especially to avoid electrical danger to the public and to staff. Where special requirements exist for trolley buses, advice is given for mechanical and functional safety, as well as for protection against fire. This publication is based on EN 50502:2015. This document covers vehicles intended for public transportation. This document applies to:
- trolley buses without on-board isolation interface from the contact line,
- buses with a current rail for guidance in the road surface,
- guided buses with bipolar roof current collectors.

Applications ferroviaires - Matériel roulant - Équipements électriques des trolleybus - Exigences de sécurité et systèmes de captage de courant

L'IEC 63076:2019 s'applique aux systèmes électriques à bord des véhicules de type trolleybus, tels que définis en 3.1, alimentés par une tension d'alimentation nominale (Un) comprise entre 600 V en courant continu et 750 V en courant continu. Le présent document définit les exigences et les recommandations de construction, notamment pour éviter les dangers de type électrique pour le public et le personnel. Lorsque les trolleybus sont soumis à des exigences particulières, des recommandations sont dispensées, concernant aussi bien la sécurité mécanique et fonctionnelle que la protection contre les incendies. La présente publication est basée sur l'EN 50502:2015. Le présent document concerne les équipements de transport public. Le présent document s'applique aux:
- trolleybus sans interface d'isolation embarquée par rapport à la ligne de contact,
- autobus équipés d'un rail d'alimentation en courant pour le guidage sur la surface de roulement,
- autobus guidés par un système de captage de courant bipolaire sur la toiture.

General Information

• Status: Published
• Publication Date: 08-Feb-2023
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: MT 63076 - TC 9/MT 63076
• Current Stage: PPUB - Publication issued
• Start Date: 27-Sep-2019
• Completion Date: 13-Sep-2019

Relations

• Amended By: IEC 63076:2019/AMD1:2023 - Amendment 1 - Railway applications - Rolling stock - Electrical equipment in trolley buses - Safety requirements and current collection systems
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 63076 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Rolling stock – Electrical equipment in trolley buses –
Safety requirements and current collection systems

Applications ferroviaires – Matériel roulant – Équipements électriques des
trolleybus – Exigences de sécurité et systèmes de captage de courant

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.

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About the IEC
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IEC 63076 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Rolling stock – Electrical equipment in trolley buses –

Safety requirements and current collection systems

Applications ferroviaires – Matériel roulant – Équipements électriques des

trolleybus – Exigences de sécurité et systèmes de captage de courant

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 45.060.01 ISBN 978-2-8322-7364-7

– 2 – IEC 63076:2019 © IEC 2019
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Voltages and classification of the voltage bands . 12
4.1 Voltages . 12
4.1.1 General . 12
4.1.2 Operating voltages . 12
4.1.3 Insulation voltages and test voltages . 12
4.1.4 Overvoltages . 12
4.2 Classification of the voltage bands . 13
5 Trolley bus construction . 13
5.1 Protection and electrical safety criteria . 13
5.1.1 Protection criteria against direct and indirect contacts . 13
5.1.2 Steps, stanchions, handrails, slopes and access platforms . 15
5.1.3 Doors and door handles . 15
5.1.4 Cabling . 15
5.1.5 Open door interlocking . 16
5.1.6 Leakage current detector . 16
5.1.7 Intermediate mass insulation detector . 16
5.1.8 Capacitors . 17
5.1.9 Equipotential connections . 17
5.1.10 Electromagnetic compatibility (EMC) . 17
5.1.11 Overvoltage protection . 18
5.2 Electrical components in band III voltage . 18
5.2.1 General information . 18
5.2.2 Current collection system . 18
5.2.3 Electric traction equipment . 19
5.2.4 Power supply independent from overhead contact line . 20
5.2.5 Auxiliary groups . 21
5.2.6 Heating and ventilation systems . 21
5.2.7 Cables . 21
5.3 Electrical components in band II voltage . 21
5.3.1 General information . 21
5.3.2 Cables . 22
5.3.3 Separation from other voltage band circuits . 22
5.4 Electrical components in band I voltage . 22
5.4.1 General information . 22
5.4.2 Cables . 22
5.4.3 Separation from other voltage band circuits . 22
6 Checks and tests . 22
6.1 General information . 22
6.2 New trolley-buses . 23
6.2.1 Design and construction verification . 23
6.2.2 Separate source applied voltage tests on circuits and components fed
at voltages of the band III from the overhead contact line . 24

6.2.3 Separate source applied voltage tests on circuits and components fed
at voltages of the band III insulated from the overhead contact line . 24
6.2.4 Separate source applied voltage tests on circuits and components fed
at voltages of the band II . 25
6.2.5 Tests of the insulation of entrance areas . 26
6.2.6 Insulation resistance values for circuits and components supplied at
band III voltages from the line voltage . 26
6.2.7 Insulation resistance tests for circuits and components supplied at the
line voltage . 26
6.2.8 Insulation resistance values for circuits and components supplied at
band III voltages insulated from the line voltage . 28
6.2.9 Insulation resistance tests for circuits and components supplied at band
III voltages insulated from the line voltage . 28
6.2.10 Insulation resistance values for circuits and components supplied at a
voltage of band II . 29
6.2.11 Insulation resistance tests for circuits and components supplied at a
voltage of band II . 29
6.3 Overhauled trolley-bus . 29
6.3.1 Tests and verification of the electrical equipment . 29
6.3.2 Measurements and value of the insulation resistance . 29
6.3.3 Insulation resistance tests . 29
6.3.4 Trolley bus after minor or maintenance repairs . 30
6.4 On-duty trolley-bus (periodic checks) . 30
6.4.1 Insulation decay and provisions required . 30
6.4.2 Periodical checks and tests of the insulation during maintenance . 30
6.4.3 Periodical checks and tests of the insulation . 31
6.5 Leakage detectors (overhaul, definitions, thresholds) . 31
6.5.1 Operating voltages and temperature ranges . 31
6.5.2 Operation and alarm of the detector. 31
6.5.3 Limits and calibration of the detector . 32
6.5.4 Periodic efficiency checks . 38
Annex A (normative) Constructional detailed provisions .
...

IEC 63076 ®
Edition 1.1 2023-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Railway applications – Rolling stock – Electrical equipment in trolley buses –
Safety requirements and current collection systems

Applications ferroviaires – Matériel roulant – Équipements électriques des
trolleybus – Exigences de sécurité et systèmes de captage de courants

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 Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
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 IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: [e-mail].
A propos de l'IEC
La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC
Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la
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projets et les publications remplacées ou retirées. Electropedia - www.electropedia.org

Le premier dictionnaire d'électrotechnologie en ligne au monde,
IEC Just Published - webstore.iec.ch/justpublished
avec plus de 22 300 articles terminologiques en anglais et en
Restez informé sur les nouvelles publications IEC. Just
français, ainsi que les termes équivalents dans 19 langues
Published détaille les nouvelles publications parues.
additionnelles. Egalement appelé Vocabulaire
Disponible en ligne et une fois par mois par email.
Electrotechnique International (IEV) en ligne.

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Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC Products & Services Portal - products.iec.ch

IEC 63076 ®
Edition 1.1 2023-02
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Railway applications – Rolling stock – Electrical equipment in trolley buses –
Safety requirements and current collection systems
Applications ferroviaires – Matériel roulant – Équipements électriques des
trolleybus – Exigences de sécurité et systèmes de captage de courants
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 45.060.01 ISBN 978-2-8322-6476-8

IEC 63076 ®
Edition 1.1 2023-02
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Railway applications – Rolling stock – Electrical equipment in trolley buses –
Safety requirements and current collection systems

Applications ferroviaires – Matériel roulant – Équipements électriques des
trolleybus – Exigences de sécurité et systèmes de captage de courants

– 2 – IEC 63076:2019+AMD1:2023 CSV
© IEC 2023
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 Voltages and classification of the voltage bands . 12
4.1 Voltages . 12
4.1.1 General . 12
4.1.2 Operating voltages . 12
4.1.3 Insulation voltages and test voltages . 12
4.1.4 Overvoltages . 13
4.2 Classification of the voltage bands . 13
5 Trolley bus construction . 13
5.1 Protection and electrical safety criteria . 13
5.1.1 Protection criteria against direct and indirect contacts . 13
5.1.2 Steps, stanchions, handrails, slopes and access platforms . 16
5.1.3 Doors and door handles . 16
5.1.4 Cabling . 16
5.1.5 Open door interlocking . 17
5.1.6 Leakage current detector . 17
5.1.7 Intermediate mass insulation detector . 17
5.1.8 Capacitors . 18
5.1.9 Equipotential connections . 18
5.1.10 Electromagnetic compatibility (EMC) . 18
5.1.11 Overvoltage protection . 19
5.2 Electrical components in band III voltage . 19
5.2.1 General information . 19
5.2.2 Current collection system . 19
5.2.3 Electric traction equipment . 20
5.2.4 Power supply independent from overhead contact line . 21
5.2.5 Auxiliary groups . 22
5.2.6 Heating and ventilation systems . 22
5.2.7 Cables . 22
5.3 Electrical components in band II voltage . 23
5.3.1 General information . 23
5.3.2 Cables . 23
5.3.3 Separation from other voltage band circuits . 23
5.4 Electrical components in band I voltage . 23
5.4.1 General information . 23
5.4.2 Cables . 24
5.4.3 Separation from other voltage band circuits . 24
6 Checks and tests . 24
6.1 General information . 24
6.2 New trolley-buses . 25
6.2.1 Design and construction verification . 25
6.2.2 Separate source applied voltage tests on circuits and components fed
at voltages of the band III from the overhead contact line . 25

© IEC 2023
6.2.3 Separate source applied voltage tests on circuits and components fed
at voltages of the band III insulated from the overhead contact line . 26
6.2.4 Separate source applied voltage tests on circuits and components fed
at voltages of the band II . 27
6.2.5 Tests of the insulation of entrance areas . 28
6.2.6 Insulation resistance values for circuits and components supplied at
band III voltages from the line voltage . 28
6.2.7 Insulation resistance tests for circuits and components supplied at the
line voltage . 28
6.2.8 Insulation resistance values for circuits and components supplied at
band III voltages insulated from the line voltage . 29
6.2.9 Insulation resistance tests for circuits and components supplied at band
III voltages insulated from the line voltage . 30
6.2.10 Insulation resistance values for circuits and components supplied at a
voltage of band II . 30
6.2.11 Insulation resistance tests for circuits and components supplied at a
voltage of band II . 30
6.3 Overhauled trolley-bus . 31
6.3.1 Tests and verification of the electrical equipment . 31
6.3.2 Measurements and value of the insulation resistance . 31
6.3.3 Insulation resistance tests . 31
6.3.4 Trolley bus after minor or maintenance repairs . 31
6.4 On-duty trolley-bus (periodic checks) . 31
6.4.1 Insulation decay and provisions required . 31
6.4.2 Periodical checks and tests of the insulation during maintenance . 32
6.4.3 Periodical checks and tests of the insulation . 32
6.5 Leakage detectors (overhaul, definitions, thresholds) . 33
6.5.1 Operating voltages and temperature ranges . 33
6.5.2 Operation and alarm of the detecto
...