IEC IEC 60099-8 Edition 2.02017-11 INTERNATIONAL STANDARD colour inside Surge arresters - Part 8: Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kv IEC 60099-8 :2017-11(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2017 IEC, Geneva, Switzerland 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 your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varembé Fax: +41 22 919 03 00 CH-1211 Geneva 20 [email protected] Switzerland 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. 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 corrigenda or an amendment might have been published. IEc Catalogue -webstore.iec.ch/catalogue Electropedia-www.electropedia.org The stand-alone application for consulting theentire The world's leading online dictionary of electronic and bibliographical information on IEC International Standards, electrical terms containing 20 000 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 - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and varietyofcriteria(referencenumber, 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 Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and and withdrawn publications. CISPR. IECJustPublished-webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published IECCustomerServiceCentre-webstore.iec.ch/csc details all new publications released.Availableonlineand 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: [email protected]. IEC IEC 60099-8 Edition2.02017-11 INTERNATIONAL STANDARD colour inside Surge arresters - Part 8: Metal-oxide surge arresters with external series gap (EGLA) for overhead transmission and distribution lines of a.c. systems above 1 kV INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.240.10 ISBN 978-2-8322-4987-1 Warning!Make sure that you obtained this publication from an authorized distributor.