IEC 62477-2:2018
(Main)Safety requirements for power electronic converter systems and equipment - Part 2: Power electronic converters from 1 000 V AC or 1 500 V DC up to 36 kV AC or 54 kV DC
Safety requirements for power electronic converter systems and equipment - Part 2: Power electronic converters from 1 000 V AC or 1 500 V DC up to 36 kV AC or 54 kV DC
IEC 62477-2:2018 applies to power electronic converter systems (PECS) and equipment, their components for electronic power conversion and electronic power switching, including the means for their control, protection, monitoring and measurement, such as with the main purpose of converting electric power, with rated system voltages from 1 000 V AC or 1 500 V DC up to 36 kV AC or 54 kV DC.
This document can also be used as a reference standard for product committees producing product standards for adjustable speed electric power drive systems (PDS),
standalone uninterruptible power systems (UPS), and
stabilized DC power supplies.
For PECS for which no product standard exists, this document provides minimum requirements for safety aspects.
This document has the status of a group safety publication in accordance with IEC Guide 104 for power electronic converter systems and equipment for solar, wind, tidal, wave, fuel cell or similar energy sources.
According to IEC Guide 104, one of the responsibilities of technical committees is, wherever applicable, to make use of basic safety publications and/or group safety publications in the preparation of their product standards.
This document establishes a common terminology for safety aspects relating to PECS and equipment,
establishes minimum requirements for the coordination of safety aspects of interrelated parts within a PECS,
establishes a common basis for minimum safety requirements for the PEC portion of products that contain PEC,
specifies requirements to reduce risks of fire, electric shock, thermal, energy and mechanical hazards, during use and operation and, where specifically stated, during service and maintenance,
specifies minimum requirements to reduce risks with respect to pluggable and permanently connected equipment, whether it consists of a system of interconnected units or independent units, subject to installing, operating and maintaining the equipment in the manner prescribed by the manufacturer,
establishes an arc fault rating label requirement with testing instructions for PEC and PECS, and
covers power electronic converters and systems in open type design, which are catalog (pre-defined commercially available) power electronic converters and systems or engineered solutions from same.
This document does not cover telecommunications apparatus other than power supplies to such apparatus,
functional safety aspects as covered by, for example, IEC 61508 (all parts),
electrical equipment and systems for railways applications and electric vehicles, and
power electronic converters and systems in open type design, which are – in their major part – dimensioned, designed and constructed according to the user’s individual requirements and specifications and follow power installation standards, for example IEC 61936-1.
Exigences de sécurité applicables aux systèmes et matériels électroniques de conversion de puissance – Partie 2: Convertisseurs électroniques de puissance entre 1 000 V en courant alternatif ou 1 500 V en courant continu et 36 kV en courant alternatif ou 54 kV en courant continu
L'IEC 62477-2:2018 s'applique aux matériels et aux systèmes électroniques de conversion de puissance (SECP), à leurs composants pour la conversion de puissance électronique et la commande (ouverture et fermeture) électronique de puissance, y compris les moyens de commande, de protection, de surveillance et de mesure, ayant pour principale fonction la conversion de puissance électrique, d'une tension système assignée entre 1 000 V en courant alternatif ou 1 500 V en courant continu et 36 kV en courant alternatif ou 54 kV en courant continu.
Le présent document peut également être utilisé comme norme de référence par les comités de produits qui élaborent des normes de produits applicables aux systèmes d'entraînement électrique de puissance à vitesse variable,
alimentations sans interruption (ASI) autonomes, et
alimentations stabilisées en courant continu.
Pour les SECP pour lesquels il n'existe pas de norme de produit, le présent document spécifie des exigences minimales pour les aspects de sécurité.
La présente document a le statut d’une publication groupée de sécurité conformément au Guide 104 de l'IEC applicable aux systèmes électroniques de conversion de puissance et équipements pour énergie solaire, éolienne, des marées, des vagues, des piles à combustible ou sources d’énergie analogues.
Conformément au Guide 104 de l'IEC, il incombe aux comités d'études d'utiliser, dans toute la mesure du possible, les publications fondamentales de sécurité et/ou les publications groupées de sécurité pour l'élaboration de leurs normes de produits.
Le présent document établit une terminologie commune applicable aux aspects de sécurité concernant les matériels et les SECP,
établit les exigences minimales pour la coordination des aspects de sécurité des parties interconnectées au sein d'un SECP,
établit une base commune applicable aux exigences minimales de sécurité de la partie du convertisseur électronique de puissance (CEP) des produits comprenant un CEP,
spécifie des exigences permettant de réduire les risques d'incendie et de choc électrique ainsi que les dangers thermiques, mécaniques et dus à l'énergie électrique, en cours d'utilisation et de fonctionnement et, lorsque cela est spécifiquement indiqué, au cours des opérations d'entretien et de maintenance,
spécifie les exigences minimales permettant de réduire ces types de risques concernant les matériels enfichables et connectés en permanence, qu'ils soient constitués d'un système d'unités interconnectées ou d'unités indépendantes, faisant l'objet d'opérations d'installation, de fonctionnement et d'entretien du matériel tel que spécifié par le constructeur,
établit les exigences en matière de marquage de caractéristiques assignées de défaut d'arc avec des instructions d'essai pour les CEP et SECP, et
couvre les convertisseurs et systèmes électroniques de puissance de type ouvert, qui sont des convertisseurs et systèmes électroniques de puissance de catalogue (prédéfinis comme étant disponibles sur le marché) ou des solutions techniques de catalogue.
Le présent document ne couvre pas les appareils de télécommunications autres que les alimentations pour ce type d'appareil,
les aspects de sécurité fonctionnelle tels que traités, par exemple, par l'IEC 61508 (toutes les parties),
les matériels et systèmes électriques utilisés dans les applications ferroviaires et les véhicules électriques, et
les convertisseurs et systèmes électroniques de puissance de type ouvert qui sont, pour la plupart, dimensionnés, conçus et fabriqués selon les exigences et spécifications individuelles de l'utilisateur et qui fournissent des normes d'installation de puissance, par exemple l'IEC 61936-1.
General Information
Standards Content (Sample)
IEC 62477-2 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for power electronic converter systems and equipment –
Part 2: Power electronic converters from 1 000 V AC or 1 500 V DC up to 36 kV
AC or 54 kV DC
Exigences de sécurité applicables aux systèmes et matériels électroniques de
conversion de puissance –
Partie 2: Convertisseurs électroniques de puissance entre 1 000 V en courant
alternatif ou 1 500 V en courant continu et 36 kV en courant alternatif ou 54 kV
en courant continu
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 corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
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.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
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
CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
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
plus récente, un corrigendum ou amendement peut avoir été publié.
Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 21 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.
Recherche de publications IEC -
Glossaire IEC - std.iec.ch/glossary
webstore.iec.ch/advsearchform
67 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC et en français, extraites des articles Termes et Définitions des
en utilisant différents critères (numéro de référence, texte, publications IEC parues depuis 2002. Plus certaines entrées
comité d’études,…). Elle donne aussi des informations sur les antérieures extraites des publications des CE 37, 77, 86 et
projets et les publications remplacées ou retirées. CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just Si vous désirez nous donner des commentaires sur cette
Published détaille les nouvelles publications parues. publication ou si vous avez des questions contactez-nous:
Disponible en ligne et aussi une fois par mois par email. sales@iec.ch.
IEC 62477-2 ®
Edition 1.0 2018-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for power electronic converter systems and equipment –
Part 2: Power electronic converters from 1 000 V AC or 1 500 V DC up to 36 kV
AC or 54 kV DC
Exigences de sécurité applicables aux systèmes et matériels électroniques de
conversion de puissance –
Partie 2: Convertisseurs électroniques de puissance entre 1 000 V en courant
alternatif ou 1 500 V en courant continu et 36 kV en courant alternatif ou 54 kV
en courant continu
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-5787-6
– 2 – IEC 62477-2:2018 © IEC 2018
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 11
3 Terms and definitions . 11
4 Protection against hazards . 12
4.1 General . 12
4.2 Fault and abnormal conditions . 13
4.3 Short-circuit and overload protection . 14
4.3.1 General . 14
4.3.2 Specification of input short-circuit withstand strength and output short-
circuit current ability . 14
4.3.3 Short-circuit coordination (backup protection) . 14
4.3.4 Protection by several devices . 14
4.3.5 Input ports short time withstand current, I . 14
cw
4.4 Protection against electric shock . 14
4.4.1 General . 14
4.4.2 Decisive voltage class . 15
4.4.3 Provision for basic protection . 16
4.4.4 Provision for fault protection . 17
4.4.5 Enhanced protection . 18
4.4.6 Protective measures . 18
4.4.7 Insulation . 19
4.4.8 Compatibility with residual current-operated protective devices (RCD) . 24
4.4.9 Capacitor discharge . 24
4.5 Protection against electrical energy hazards . 26
4.5.1 Operator access areas. 26
4.5.2 Service access areas . 28
4.6 Protection against fire and thermal hazards . 28
4.6.1 Circuits representing a fire hazard . 28
4.6.2 Components representing a fire hazard . 28
4.6.3 Fire enclosures . 28
4.6.4 Temperature limits . 29
4.6.5 Limited power sources . 29
4.7 Protection against mechanical hazards . 29
4.7.1 General . 29
4.7.2 Specific requirements for liquid cooled PECS . 29
4.8 Equipment with multiple sources of supply . 30
4.9 Protection against environmental stresses . 30
4.10 Protection against sonic pressure hazards . 30
4.10.1 General . 30
4.10.2 Sonic pressure and sound level . 31
4.11 Wiring and connections . 31
4.11.1 General . 31
4.11.2 Routing . 31
4.11.3 Colour coding . 31
4.11.4 Splices and connections . 31
4.11.5 Accessible connections . 31
4.11.6 Interconnections between parts of the PECS . 31
4.11.7 Supply connections. 31
4.11.8 Terminals . 31
4.12 Enclosures . 31
4.12.1 General . 31
4.12.2 Handles and manual controls . 32
4.12.3 Cast metal . 32
4.12.4 Sheet metal . 32
4.12.5 Stability test for enclosure . 32
5 Test requirements . 32
5.1 General . 32
5.1.1 Test objectives and classification . 32
5.1.2 Selection of test samples . 33
5.1.3 Sequence of tests . 33
5.1.4 Earthing conditions . 33
5.1.5 General conditions for tests . 33
5.1.6 Compliance . 33
5.1.7 Test overview . 33
5.2 Test specifications . 33
5.2.1 Visual inspections (type test, sample test and routine test) . 33
5.2.2 Mechanical tests . 34
5.2.3 Electrical tests . 35
5.2.4 Abnormal operation and simulated faults tests . 38
5.2.5 Material tests . 42
5.2.6 Environmental tests (type tests) . 42
5.2.7 Hydrostatic pressure test (type test and routine test) . 43
6 Information and marking requirements . 43
6.1 General . 43
6.2 Information for selection . 43
6.3 Information for installation and commissioning . 43
6.3.1 General . 43
6.3.2 Mechanical considerations . 43
6.3.3 Environment . 43
6.3.4 Handling and mounting . 43
6.3.5 Enclosure temperature. 43
6.3.6 Connections . 43
6.3.7 Protection requirements . 44
6.3.8 Commissioning . 45
6.4 Information for use . 45
6.4.1 General . 45
6.4.2 Adjustment . 45
6.4.3 Labels, signs and signals . 45
6.5 Information for maintenance . 45
6.5.1 General . 45
6.5.2 Capacitor discharge . 45
6.5.3 Auto restart/bypass connection . 45
6.5.4 Other hazards . 46
6.5.5 Equipment with multiple sources of supply . 46
– 4 – IEC 62477-2:2018 © IEC 2018
Annex A (normative) Additional information for protection against electric shock . 47
A.1 General . 47
A.2 Protection by means of DVC As . 47
A.3 Protection by means of protective impedance . 47
A.4 Protection by using limited voltages . 47
A.5 Evaluation of working voltage and selection of DVC for touch voltage, PELV
and SELV circuits . 47
A.6 Evaluation of the working voltage of circuits . 47
A.7 Examples of the use of elements of protective measures . 47
Annex B (informative) Considerations for the reduction of the pollution degree . 49
Annex C (informative) Symbols referred to in IEC 62477-1 . 50
Annex D (normative) Evaluation of clearance and creepage distances . 51
Annex E (informative) Altitude correction for clearances . 52
Annex F (normative) Clearance and creepage distance determination for frequencies
greater than 30 kHz . 53
Annex G (informative) Cross-sections of round conductors . 54
Annex H (informative) Guidelines for RCD compatibility . 55
H.1 Selection of RCD type . 55
Annex I (informative) Examples of overvoltage category reduction . 56
Annex J (informative) Burn thresholds for touchable surfaces . 57
Annex K (informative) Table of electrochemical potentials . 58
Annex L (informative) Measuring instrument for touch current measurements . 59
L.1 Measuring instrument. 59
Annex M (informative) Test probes for determining access . 60
Annex N (informative) Guidance regarding short-circuit current. 61
Annex AA (normative) Arc fault test and labelling requirements . 62
AA.1 Overview. 62
AA.2 References . 62
AA.3 Terms and definitions . 62
AA.4 Ratings . 65
AA.4.1 General . 65
AA.4.2 Internal arc classification . 65
AA.5 Testing . 70
AA.5.1 General . 70
AA.5.2 Test preparation . 71
AA.5.3 Test conditions . 77
AA.5.4 Assessment . 86
AA.6 Arc-prohibiting design . 89
AA.6.1 General . 89
AA.6.2 Requirements . 90
AA.6.3 Testing . 91
AA.7 Information and marking requirements . 92
AA.7.1 General . 92
AA.7.2 IAC rating plate . 93
AA.7.3 Information in manuals . 94
AA.7.4 Product marking – Internal protection . 96
AA.8 Internal arc classification concepts . 96
AA.8.1 General . 96
AA.8.2 Discription of risk and selection of equipment . 98
AA.8.3 Causes and preventative measures . 98
AA.8.4 Protection . 99
AA.8.5 Considerations for selection and installation . 100
AA.8.6 Requirements for concepts 5 and 6. 101
AA.8.7 Installation of PECS with general public access . 101
Bibliography . 103
Figure AA.1 – Mounting frame for vertical indicators . 72
Figure AA.2 – Horizontal indicator . 73
Figure AA.3 – Arrangement of indicators for different height of equipment . 75
Figure AA.4 – Example for two adjacent accessible sides . 75
Figure AA.5 – Examples for an accessible side to a non-accessible side . 76
Figure AA.6 – General setup for testing – Details . 78
Figure AA.7 – General setup for calibration . 78
Figure AA.8 – General setup for testing . 78
Figure AA.9 – General setup for user installation . 79
Figure AA.10 – Power drive system with 12-pulse diode rectifier supplied by an
external transformer and a motor at the output . 80
Figure AA.11 – Power drive system with integrated transformer and a motor at the
output . 81
Figure AA.12 – Grid interconnection between 50 Hz and 60 Hz grids . 82
Figure AA.13 – Example for test of sub-assemblies of a PECS . 86
Figure AA.14 – Installation example of mix of accessibility types including 4a or 4b . 102
Table 5 – Steady state voltage limits for the decisive voltage classes . 15
Table 6 – Protection requirements for circuit under consideration . 16
Table 101 – Impulse withstand voltage and temporary overvoltage versus system
voltage from 1 000 V AC or 1 500 V DC up to 36 kV AC or 54 kV DC . 20
Table 102 – Clearance distances for functional, basic or supplementary insulation . 22
Table 103 – Creepage distances (in millimetres) . 23
Table 104 – Limits for power sources without an overcurrent protective device . 27
Table 105 – Limits for power sources with an overcurrent protective device . 28
Table 22 – Test overview . 33
Table 23 – Pull values for handles and manual control securement . 35
Table 106 – Impulse test voltage . 36
Table 107 – AC or DC test voltage for circuits connected directly to HV mains supply. 37
Table A.4 – Examples for protection against electrical shock . 48
Table C.1 – Symbols used . 50
Table AA.1 – Definition of accessibility types . 67
Table AA.2 – Single phase-to-earth internal arc fault current depending on the network
neutral earthing. 69
Table AA.3 – Parameters for internal fault test according to compartment construction . 85
Table AA.4 – Information requirements . 92
– 6 – IEC 62477-2:2018 © IEC 2018
Table AA.5 – Example for concepts 2 and 3 (see Clause AA.8). 93
Table AA.6 – Example for concept 4 (see Clause AA.8) . 93
Table AA.7 – Example for not tested or test failed for concepts 5 and 6 (see Clause AA.8) . 93
Table AA.8 – Example for concept 1 (see Clause AA.8) . 94
Table AA.9 – Example for accessibility type 0+ for concepts 5 and 6 (see Clause AA.8) . 94
Table AA.10 – Internal arc fault safety concepts . 97
Table AA.11 – Locations, causes and examples of measures to decrease the
probability of internal arc faults . 99
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR POWER ELECTRONIC
CONVERTER SYSTEMS AND EQUIPMENT –
Part 2: Power electronic converters from 1 000 V AC or
1 500 V DC up to 36 kV AC or 54 kV DC
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 62477-2 has been prepared by IEC technical committee 22: Power
electronic systems and equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
22/290/FDIS 22/293/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
– 8 – IEC 62477-2:2018 © IEC 2018
It has the status of a group safety publication in accordance with IEC Guide 104.
This International Standard is to be used in conjunction with IEC 62477-1:2012 and
IEC 62477-1:2012/AMD1:2016.
This document supplements or modifies the corresponding clauses in IEC 62477-1:2012 and
IEC 62477-1:2012/AMD1:2016. Where this document states "addition", "modification" or
"replacement", the relevant requirement, test specification or explanatory matter in
IEC 62477-1:2012 and IEC 62477-1:2012/AMD1:2016 is adapted accordingly. Where no
change is necessary, this document indicates that the relevant clause or subclause applies.
Where this document states “does not apply” this clause of the mentioned version of
IEC 62477-1 does not apply to any section of the equipment. Products that are designed to be
compliant to IEC 62477-1:2012 and IEC 62477-1:2012/AMD1:2016 are acceptable as
components within the equipment designed to this document. Additional subclauses, tables
and figures are numbered starting at 101. Additional annexes are numbered with double
capital characters, starting with AA.
A list of all the parts in the IEC 62477 series, published under the general title Safety
requirements for power electronic converter systems and equipment can be found on the
IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This part of IEC 62477 relates to products that include power electronic converters, with a
rated system voltage from 1 000 V AC or 1 500 V DC up to 36 kV AC or 54 kV DC. It specifies
requirements to reduce risks of fire, electric shock, thermal, energy and mechanical hazards,
except functional safety as defined in IEC 61508 (all parts). The objectives of this document
are to establish a common terminology and basis for the safety requirements of products that
contain power electronic converters across several IEC technical committees.
This document has been developed with the intention
• to be used as a reference document for product committees inside TC 22 in the
development of product standards for power electronic converter systems and equipment;
• to replace IEC 62103 as a product family standard providing minimum requirements for
safety aspects of power electronic converter systems and equipment in apparatus for
which no product standard exists, and
NOTE The scope of IEC 62103 contains reliability aspects, which are not covered by this document.
• to be used as a reference document for product committees outside TC 22 in the
development of product standards of power electronic converter systems and equipment
intented renewable energy sources. Especially TC 82, TC 88, TC 105 and TC 114 have
been identified as relevant technical committees at the time of publication.
Technical committees using this document should carefully consider the relevance of each
paragraph in this document for the product under consideration and reference, add, replace or
modify requirement as relevant. Product specific topics not covered by this document are in
the responsibility of the technical committees using this document as reference document.
This document will not take precedence on any product specific standard according to IEC
Guide 104. IEC Guide 104 provides information about the responsibility of product committees
to use group safety standards for the development of their own product standards.
The most significant differences compared to IEC 62477-1:2012 and
IEC 62477-1:2012/AMD1:2016 are the following:
• this document extends the range of rated system voltages for high-voltage (HV) up to
36 kV AC or 54 kV DC;
• this document adds arc fault rating label requirements with testing instructions.
– 10 – IEC 62477-2:2018 © IEC 2018
SAFETY REQUIREMENTS FOR POWER ELECTRONIC
CONVERTER SYSTEMS AND EQUIPMENT –
Part 2: Power electronic converters from 1 000 V AC or
1 500 V DC up to 36 kV AC or 54 kV DC
1 Scope
This part of IEC 62477 applies to power electronic converter systems (PECS) and equipment,
their components for electronic power conversion and electronic power switching, including
the means for their control, protection, monitoring and measurement, such as with the main
purpose of converting electric power, with rated system voltages from 1 000 V AC or
1 500 V DC up to 36 kV AC or 54 kV DC.
This document can also be used as a reference standard for product committees producing
product standards for
• adjustable speed electric power drive systems (PDS),
• standalone uninterruptible power systems (UPS), and
• stabilized DC power supplies.
For PECS for which no product standard exists, this document provides minimum
requirements for safety aspects.
This document has the status of a group safety publication in accordance with IEC Guide 104
for power electronic converter systems and equipment for solar, wind, tidal, wave, fuel cell or
similar energy sources.
According to IEC Guide 104, one of the responsibilities of technical committees is, wherever
applicable, to make use of basic safety publications and/or group safety publications in the
preparation of their product standards.
This document
• establishes a common terminology for safety aspects relating to PECS and equipment,
• establishes minimum requirements for the coordination of safety aspects of interrelated
parts within a PECS,
• establishes a common basis for minimum safety requirements for the PEC portion of
products that contain PEC,
• specifies requirements to reduce risks of fire, electric shock, thermal, energy and
mechanical hazards, during use and operation and, where specifically stated, during
service and maintenance,
• specifies minimum requirements to reduce risks with respect to pluggable and
permanently connected equipment, whether it consists of a system of interconnected units
or independent units, subject to installing, operating and maintaining the equipment in the
manner prescribed by the manufacturer,
• establishes an arc fault rating label requirement with testing instructions for PEC and
PECS, and
• covers power electronic converters and systems in open type design, which are catalog
(pre-defined commercially available) power electronic converters and systems or
engineered solutions from same.
This document does not cover
• telecommunications apparatus other than power supplies to such apparatus,
• functional safety aspects as covered by, for example, IEC 61508 (all parts),
• electrical equipment and systems for railways applications and electric vehicles, and
• power electronic converters and systems in open type design, which are – in their major
part – dimensioned, designed and constructed according to the user’s individual
requirements and specifications and follow power installation standards, for example
IEC 61936-1.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 60204-11, 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
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60617, Graphical symbols for diagrams (available at http://std.iec.ch/iec60617)
IEC 60730-1, Automatic electrical controls – Part 1: General requirements
IEC 61230, Live working – Portable equipment for earthing or earthing and short-circuiting
IEC 62271-102, High-voltage switchgear and controlgear – Part 102: Alternating current
disconnectors and earthing switches
IEC 62477-1:2012, Safety requirements for power electronic converter systems and
equipment – Part 1: General
IEC 62477-1:2012/AMD1:2016
IEC Guide 104, The preparation of safety publications and the use of basic safety publications
and group safety publications
ISO/IEC Guide 51:2014, Safety aspects – Guidelines for their inclusion in standards
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62477-1:2012 and
IEC 62477-1:2012/AMD1:2016 apply, except as follows.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
– 12 – IEC 62477-2:2018 © IEC 2018
3.24
mains supply
Replacement:
power distribution system that supply power to a PEC or PECS
Note 1 to entry: The voltage level can be any voltage within the range between 0 V and 36 kV AC or 54 kV DC.
3.27
open type
Addition:
Note 1 to entry: Open type HV equipment can also be installed behind a barrier, fence, building structure, etc.
which is intended to provide the same protection as an enclosure.
Additional terms and definitions:
3.101
high voltage PEC or PECS
HV PEC or PECS
PEC or PECS with a system voltage from 1 000 V AC or 1 500 V DC up to 36 kV AC or
54 kV DC
3.102
operator access area
area for which, under normal operating conditions,
a) access is gained without the use of a tool, or
b) the means of access is deliberately provided to the operator, or
c) the operator is instructed to enter regardless of whether or not tools are needed to gain
access
Note 1 to entry: In this document, the terms "access" and "accessible", unless qualified, relate to operator access
as defined above.
4 Protection against hazards
4.1 General
4.1 of IEC 62477-1:2012 applies, except as follows.
Addition:
This document is written primarily addressing equipment contained within an enclosure. This
document makes allowance for its usage with open type equipment. It is recommended when
using this document
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...