IEC IEC 61439-2 Edition3.02020-07 INTERNATIONAL STANDARD Low-voltage switchgear and controlgear assemblies- Part 2: Power switchgear and controlgear assemblies IEC 61439-2:2020-07(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @2020 IEC, 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, please contact the address below or 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 The Intemational Electrotechnical Commission, (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. AboutIEcpublications 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 and withdrawn publications.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 Stay up to date on all new IEC publications. Just Published IEc Glossary - std.iec.ch/glossary 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]. IEC IEC 61439-2 Edition 3.02020-07 INTERNATIONAL STANDARD Low-voltageswitchgearandcontrolgearassemblies- Part2:Powerswitchgearandcontrolgearassemblies INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.130.20 ISBN 978-2-8322-8587-9 Warning! Make sure that you obtained this publication from an authorized distributor. ? Registered tra rk of the lInternational Electrotechnical Commission