IEC IECTS62271-304 Edition2.02019-03 TECHNICAL SPECIFICATION SPECIFICATION TECHNIQUE colour nside High-voltage switchgearand controlgear Part 304: Classification of indoor enclosed switchgear and controlgear for rated voltages above 1 kV up to and including 52 kV related to the use in special service conditions with respect to condensation and pollution Appareillage a haute tension- Partie 3o4:Classificationde I'appareillage dinterieur sous enveloppe pour tensions assignees supérieures a 1 kV et jusqu'a 52 kv inclus relatives a I'utilisation dans des conditions speciales de service en ce qui concerne la condensation et la pollution IEC TS 62271-304:2019-03(en-fr) THIS PUBLICATIONIS COPYRIGHTPROTECTED Copyright@2019IEC,Geneva,Switzerland 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, piease contact the address below or your local IEC member National Committee for further information. Droits de reproduction reserves. Sauf indication contraire, aucune partie de cette publication ne peut etre reproduite ni utilisée sous quelque forme que ce soit et par aucun procede, électronique ou mecanique, y compris la photocopie et les microfilms, sans I'accord écrit de I'IEc ou du Comite national de I'IEC du pays du demandeur. Si vous avez des questions sur le copyright de IlEC ou si vous desirez obtenir des droits supplementaires sur cette publication, utilisez les coordonnees ci-apres ou contactez le Comite national de I'lEC de votre pays de residence. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varembe [email protected] CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC International Standards for all electrical, electronic and related technologies. AboutIEC 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. varietyof 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 IEc Glossary - std.iec.ch/glossary Stay up to date on all new IEC publications. Just Published 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:[email protected]. A propos de Il'IEc La Commission Electrotechnique Internationale (IEC) est la premiere organisation mondiale qui élabore et publie des Normes internationales pour tout ce qui a trait a I'electricite, a I'électronique et aux technologies apparentees. A propos des publications IEC Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possedez I'édition la plus recente, un corrigendum ou amendement peut avoir ete publie. Recherche de publications IEc. Electropedia-www.elec