IEC 60204-11:2018

Safety of machinery - Electrical equipment of machines - Part 11: Requirements for equipment for voltages above 1 000 V AC or 1 500 V DC and not exceeding 36 kV

IEC 60204-11:2018 applies to electrical and electronic equipment and systems to machines, including a group of machines working together in a co-ordinated manner, which operate at nominal voltages above 1 000 V AC or 1 500 V DC and not exceeding 36 kV AC or DC with nominal frequencies not exceeding 60 Hz. IEC 60204-11:2018 cancels and replaces the first edition, published in 2000. This edition constitutes a technical revision. This edition contains significant technical changes with respect to the previous edition regarding the following:
– aspects of risk assessment, which are mirrored from ISO 12100;
– equipotential bonding and earthing;
– EMC and power quality;
– HV switchgear and controlgear;
– creepage distances for conductors and slip-ring assemblies;
– a list of machinery using HV equipment, in Annex A.
IEC 60204-11:2018 has been updated and improved to reflect the experience gained with the first edition and the evolution of high-voltage equipment reflected in the relevant standards. Regarding formal requirements, IEC 60204-11 has been aligned with
– IEC 60204-1:2016,
– IEC 61936-1:2010 and IEC 61936-1:2010/AMD1:2014,
– IEC 62271 (all parts). This document is intended to be used in conjunction with IEC 60204-1.

Sécurité des machines - Équipement électrique des machines - Partie 11: Exigences pour les équipements fonctionnant à des tensions supérieures à 1 000 V en courant alternatif ou 1 500 V en courant continu et ne dépassant pas 36 kV

L'IEC 60204-11:2018 est applicable aux équipements et systèmes électriques et électroniques des machines, y compris à un groupe de machines fonctionnant de manière coordonnée, qui fonctionnent à une tension nominale supérieure à 1 000 V en courant alternatif ou 1 500 V en courant continu et non supérieure à 36 kV en courant alternatif ou continu et pour des fréquences nominales n’excédant pas 60 Hz. L'IEC 60204-11:2018 annule et remplace la première édition parue en 2000. Cette édition constitue une révision technique. Cette édition contient des modifications techniques majeures par rapport à l’édition précédente qui concernent:
– les aspects liés à l’appréciation du risque, tirés de l’ISO 12100;
– les liaisons équipotentielles et la mise à la terre;
– la CEM et la qualité de la puissance;
– les appareillages à haute tension;
– les lignes de fuite pour conducteurs et ensembles de bagues collectrices;
– une liste des machines utilisant des équipements HT dans l’Annexe A.
IEC 60204-11:2018 a été mise à jour et améliorée sur la base de l’expérience acquise avec la première édition et sur la base de l’évolution des équipements haute tension décrits dans les normes applicables. Concernant les exigences de forme, l'IEC 60204-11 a été alignée sur
– l’IEC 60204-1:2016,
– l’IEC 61936-1:2010 et l’IEC 61936-1:2010/AMD1:2014,
– l’IEC 62271 (toutes les parties). Cette norme est destinée à être utilisée conjointement avec l’IEC 60204-1.

General Information

• Status: Published
• Publication Date: 30-Jul-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 13.110 - Safety of machinery
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: TC 44 - Safety of machinery - Electrotechnical aspects
• Drafting Committee: MT 60204-11 - TC 44/MT 60204-11
• Current Stage: PPUB - Publication issued
• Start Date: 03-Aug-2018
• Completion Date: 31-Jul-2018

Relations

• Revises: IEC 60204-11:2000 - Safety of machinery - Electrical equipment of machines - Part 11: Requirements for HV equipment for voltages above 1 000 V a.c. or 1 500 V d.c. and not exceeding 36 kV
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60204-11 ®
Edition 2.0 2018-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Safety of machinery – Electrical equipment of machines –
Part 11: Requirements for HV equipment for voltages above 1 000 V AC or
1 500 V DC and not exceeding 36 kV

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.

IEC Central Office 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
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IEC 60204-11 ®
Edition 2.0 2018-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Safety of machinery – Electrical equipment of machines –

Part 11: Requirements for HV equipment for voltages above 1 000 V AC or

1 500 V DC and not exceeding 36 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.110; 29.020 ISBN 978-2-8322-5929-0

– 2 – IEC 60204-11:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
2 Normative references. 11
3 Terms and definitions . 13
4 General requirements . 21
4.1 General considerations . 21
4.2 Selection of electrical equipment . 22
4.3 Electrical power supply . 22
4.3.1 General . 22
4.3.2 Supplies Voltage characteristics . 22
4.3.3 On-board power supply . 23
4.4 Physical environment and operating conditions . 23
4.4.1 General . 23
4.4.2 Electromagnetic compatibility (EMC) . 23
4.5 Transportation and storage . 24
4.6 Provisions for handling . 24
4.7 Installation . 24
4.7.1 General . 24
4.7.2 Assembly and mounting . 24
5 Incoming supply conductor terminations and devices for disconnecting and
switching off, and means for earthing . 24
5.1 Incoming supply high-voltage conductor terminations . 24
5.2 Earthing terminal of high-voltage equipment . 24
5.3 Supply disconnecting (isolating) devices and means for earthing . 25
5.3.1 General . 25
5.3.2 Type . 25
5.3.3 Requirements for disconnectors . 26
5.3.4 Means Requirements for earthing and short-circuiting . 27
Operating handle .
5.3.5 Arrangement of disconnecting and earthing devices . 27
5.4 Devices for switching off for prevention of unexpected start-up . 28
5.5 Devices for disconnecting and means for earthing HV equipment . 28
5.6 Protection against unauthorized, inadvertent and/or mistaken operation . 29
6 Protection against electric shock . 29
6.1 General . 29
6.2 Protection against direct contact . 30
6.3 Protection against indirect contact . 30
6.3.1 General . 30
6.3.2 Measures to prevent the occurrence of a hazardous touch voltage for
an unlimited time of fault duration . 31
6.3.3 Protection by automatic disconnection of supply within a limited time of
fault duration . 31
6.3.4 Protection for mobile machines . 31
7 Protection of HV equipment . 32
7.1 General . 32

7.2 Overcurrent protection . 32
7.2.1 General . 32
7.2.2 Supply conductors . 32
7.2.3 Power circuits . 32
7.2.4 Transformers . 33
7.2.5 Overcurrent protective devices . 33
7.2.6 Rating and setting of overcurrent protective devices . 33
7.3 Protection of motors against overheating . 33
7.4 Protection against abnormal temperature . 33
7.5 Protection against the effects of supply interruption or voltage reduction and
subsequent restoration . 33
7.6 Motor overspeed protection . 34
7.7 Earth fault protection . 34
7.8 Protection against overvoltages due to lightning and to switching surges . 34
Protection against abnormal conditions .
7.9 Protection against hazards due to arc faults . 35
7.10 Protection against overpressure and leakage . 35
7.11 Protection against fire . 35
8 Equipotential bonding . 35
8.1 General . 35
8.2 Protective bonding circuit . 37
8.2.1 General . 37
8.2.2 Protective conductors . 38
8.2.3 Continuity of the protective bonding circuit . 39
Exclusion of switching devices from the protective bonding circuit .
Interruption of the protective bonding circuit .
8.2.4 Mobile machines . 40
8.2.5 Protective bonding circuit connecting points . 40
8.2.6 Supplementary equipotential protective bonding conductors . 40
9 Control systems, control circuits and control functions . 40
10 Operator interface and machine-mounted control devices . 41
11 Electronic equipment . 41
12 Controlgear: location, mounting, and enclosures . 41
12.1 General requirements . 41
12.2 Location and mounting . 41
12.2.1 Accessibility and maintenance . 41
12.2.2 Physical separation . 42
12.3 Degrees of protection . 42
12.4 Enclosures, doors and openings . 43
12.5 Access to HV equipment . 44
13 Conductors and cables . 44
13.1 General requirements . 44
13.2 Conductors . 44
13.3 Insulation and sheath materials . 45
13.4 Current-carrying capacity in normal service . 45
13.5 Conductor and cable voltage drop . 46
13.6 Minimum cross-sectional area . 46
13.7 Flexible cables . 46

– 4 – IEC 60204-11:2018 RLV © IEC 2018
13.7.1 General . 46
13.7.2 Mechanical rating .
...

IEC 60204-11 ®
Edition 2.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of machinery – Electrical equipment of machines –
Part 11: Requirements for equipment for voltages above 1 000 V AC or 1 500 V
DC and not exceeding 36 kV
Sécurité des machines – Équipement électrique des machines –
Partie 11: Exigences pour les équipements fonctionnant à des tensions
supérieures à 1 000 V en courant alternatif ou 1 500 V en courant continu et ne
dépassant pas 36 kV
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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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 corrigenda or an amendment might have been published.

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bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

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The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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IEC 60204-11 ®
Edition 2.0 2018-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety of machinery – Electrical equipment of machines –

Part 11: Requirements for equipment for voltages above 1 000 V AC or 1 500 V

DC and not exceeding 36 kV
Sécurité des machines – Équipement électrique des machines –

Partie 11: Exigences pour les équipements fonctionnant à des tensions

supérieures à 1 000 V en courant alternatif ou 1 500 V en courant continu et ne

dépassant pas 36 kV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.110; 29.020 ISBN 978-2-8322-5904-7

– 2 – IEC 60204-11:2018 © IEC 2018
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
2 Normative references. 11
3 Terms and definitions . 12
4 General requirements . 18
4.1 General . 18
4.2 Selection of electrical equipment . 19
4.3 Electrical power supply . 20
4.3.1 General . 20
4.3.2 Voltage characteristics . 20
4.3.3 On-board power supply . 20
4.4 Physical environment and operating conditions . 20
4.4.1 General . 20
4.4.2 Electromagnetic compatibility (EMC) . 20
4.5 Transportation and storage . 21
4.6 Provisions for handling . 21
4.7 Installation . 21
4.7.1 General . 21
4.7.2 Assembly and mounting . 21
5 Incoming supply conductor terminations and devices for disconnecting and
switching off . 21
5.1 Incoming high-voltage conductor terminations . 21
5.2 Earthing terminal of high-voltage equipment . 21
5.3 Supply disconnecting devices and means for earthing . 22
5.3.1 General . 22
5.3.2 Type . 22
5.3.3 Requirements for disconnectors . 23
5.3.4 Requirements for earthing and short-circuiting . 23
5.3.5 Arrangement of disconnecting and earthing devices . 24
5.4 Devices for switching off for prevention of unexpected start-up . 24
5.5 Devices for disconnecting and means for earthing HV equipment . 24
5.6 Protection against unauthorized, inadvertent and/or mistaken operation . 25
6 Protection against electric shock . 25
6.1 General . 25
6.2 Protection against direct contact . 26
6.3 Protection against indirect contact . 26
6.3.1 General . 26
6.3.2 Measures to prevent the occurrence of a hazardous touch voltage for
an unlimited time of fault duration . 26
6.3.3 Protection by automatic disconnection of supply within a limited time of
fault duration . 27
6.3.4 Protection for mobile machines . 27
7 Protection of HV equipment . 28
7.1 General . 28
7.2 Overcurrent protection . 28

7.2.1 General . 28
7.2.2 Supply conductors . 28
7.2.3 Power circuits . 28
7.2.4 Transformers . 28
7.2.5 Overcurrent protective devices . 29
7.2.6 Rating and setting of overcurrent protective devices . 29
7.3 Protection of motors against overheating . 29
7.4 Protection against abnormal temperature . 29
7.5 Protection against the effects of supply interruption or voltage reduction and
subsequent restoration . 29
7.6 Motor overspeed protection . 29
7.7 Earth fault protection . 30
7.8 Protection against overvoltage due to lightning and switching surges . 30
7.9 Protection against hazards due to arc faults . 30
7.10 Protection against overpressure and leakage . 30
7.11 Protection against fire . 30
8 Equipotential bonding . 30
8.1 General . 30
8.2 Protective bonding circuit . 33
8.2.1 General . 33
8.2.2 Protective conductors .
...