IEC 62271-203:2011

IEC 62271-203 ®
Edition 2.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 203: Gas-insulated metal-enclosed switchgear for rated voltages above
52 kV
Appareillage à haute tension –
Partie 203: Appareillage sous enveloppe métallique à isolation gazeuse de
tensions assignées supérieures à 52 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.

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 la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
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.
 Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
 IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
 Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
 Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) 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 CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
 Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
 Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
 Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
Vocabulaire Electrotechnique International en ligne.
 Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: csc@iec.ch
Tél.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC 62271-203 ®
Edition 2.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage switchgear and controlgear –
Part 203: Gas-insulated metal-enclosed switchgear for rated voltages above
52 kV
Appareillage à haute tension –
Partie 203: Appareillage sous enveloppe métallique à isolation gazeuse de
tensions assignées supérieures à 52 kV

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 29.130.10 ISBN 978-2-88912-664-4

– 2 – 62271-203  IEC:2011
CONTENTS
FOREWORD . 6
1 General . 8
1.1 Scope . 8
1.2 Normative references . 8
2 Normal and special service conditions . 9
2.1 Normal service conditions . 9
2.2 Special service conditions . 9
3 Terms and definitions . 10
4 Ratings . 12
4.1 Rated voltage (U ) . 13
r
4.2 Rated insulation level . 13
4.3 Rated frequency (f ) . 15
r
4.4 Rated normal current and temperature rise . 15
4.4.1 Rated normal current (I ) . 15
r
4.4.2 Temperature rise . 15
4.5 Rated short-time withstand current (I ) . 15
k
4.6 Rated peak withstand current (I ) . 15
p
4.7 Rated duration of short-circuit (t ) . 15
k
4.8 Rated supply voltage of closing and opening devices and of auxiliary and
control circuits (U ) . 15
a
4.9 Rated supply frequency of closing and opening devices and of auxiliary
circuits . 16
4.10 Rated pressure of compressed gas supply for controlled pressure systems . 16
4.11 Rated filling levels for insulation and/or operation . 16
5 Design and construction . 16
5.1 Requirements for liquids in switchgear and controlgear . 16
5.2 Requirements for gases in switchgear and controlgear . 16
5.3 Earthing of switchgear and controlgear . 16
5.4 Auxiliary and control equipment . 17
5.5 Dependent power operation . 17
5.6 Stored energy operation . 17
5.7 Independent manual or power operation (independent unlatched operation) . 17
5.8 Operation of releases . 17
5.9 Low- and high-pressure interlocking and monitoring devices . 17
5.10 Nameplates . 18
5.11 Interlocking devices . 18
5.12 Position indication. 18
5.13 Degrees of protection by enclosures . 18
5.14 Creepage distances for outdoor insulators . 18
5.15 Gas and vacuum tightness . 19
5.15.1 Controlled pressure systems for gas . 19
5.15.2 Closed pressure systems for gas . 19
5.15.3 Sealed pressure systems . 19
5.16 Liquid tightness . 19
5.17 Fire hazard (flammability) . 19
5.18 Electromagnetic compatibility (EMC) . 19

62271-203  IEC:2011 – 3 –
5.19 X-Ray emission . 20
5.20 Corrosion . 20
5.101 Pressure coordination . 20
5.102 Internal fault . 21
5.103 Enclosures . 22
5.104 Partitions . 23
5.105 Pressure relief . 25
5.106 Noise . 26
5.107 Interfaces . 26
6 Type tests . 27
6.1 General . 27
6.1.1 Grouping of tests . 27
6.1.2 Information for identification of specimens . 28
6.1.3 Information to be included in type-tests reports . 29
6.2 Dielectric tests . 29
6.2.1 Ambient air conditions during tests . 29
6.2.2 Wet test procedure . 29
6.2.3 Conditions of switchgear and controlgear during dielectric tests. 29
6.2.4 Criteria to pass the test . 29
6.2.5 Application of the test voltage and test conditions . 29
6.2.6 Tests of switchgear and controlgear of U ≤ 245 kV . 30
r
6.2.7 Tests of switchgear and controlgear of rated voltage U >245 kV . 30
r
6.2.8 Artificial pollution tests for outdoor insulators . 31
6.2.9 Partial discharge tests . 31
6.2.10 Dielectric tests on auxiliary and control circuits . 32
6.2.11 Voltage test as condition check . 32
6.3 Radio interference voltage (r.i.v.) test . 32
6.4 Measurement of the resistance of circuits . 32
6.4.1 Main circuit . 32
6.4.2 Auxiliary circuits . 32
6.5 Temperature-rise tests. 32
6.5.1 Conditions of the switchgear and controlgear to be tested . 32
6.5.2 Arrangement of the equipment .
...