【正文】 BRITISH STANDARD BS EN 623051:2020 Protection against lightning — Part 1: General principles The European Standard EN 623051:2020 has the status of a British Standard ICS 。 Amd. No. Date Comments BS EN 623051:2020 National foreword This British Standard was published by BSI. It is the UK implementation of EN 623051:2020. It is identical with IEC 623051:2020. This standard, together with BS EN 623052:2020, BS EN 623053:2020 and BS EN 623054:2020, supersedes BS 6651:1999, which will be withdrawn on 31 August 2020. The UK participation in its preparation was entrusted to Technical Committee GEL/81, Protection against lightning. A list of anizations represented on GEL/81 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 Septemb er 2020 169。 BSI 2020 ISBN 0 580 48846 2 Amendments issued since publication EUROPEAN STANDARD EN 623051 NORME EUROP201。ENNE EUROP196。ISCHE NORM February 2020 ICS 。 English version Protection against lightning Part 1: General principles (IEC 623051:2020) Protection contre la foudre Partie 1: Principes g233。n233。raux (CEI 623051:2020) Blitzschutz Teil 1: Allgemeine Grunds228。tze (IEC 623051:2020) This European Standard was approved by CENELEC on 20200201. CENELEC members are bound to ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical mittees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Rumania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit233。 Europ233。en de Normalisation Electrotechnique Europ228。i sches Komitee f252。r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B 1050 Brussels 169。 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 623051:2020 E EN 623051:2020 Foreword The text of document 81/262/FDIS, future edition 1 of IEC 623051, prepared by IEC TC 81, Lightning protection, was submitted to the IECCENELEC parallel vote and was approved by CENELEC as EN 623051 on 20200201. The following dates were fixed: – latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 20201101 – latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 20200201 This European Standard makes reference to International Standards. Where the International Standard referred to has been endorsed as a European Standard or a homegrown European Standard exists, this European Standard shall be applied instead. Pertinent information can be found on the CENELEC web site. Endorsement notice The text of the International Standard IEC 623051:2020 was approved by CENELEC as a European Standard without any modification. – 3 – EN 623051:2020 CONTENTS Introduction ......................................................................................................................... .7 1 Scope ........................................................................................................................... .8 2 Normative references .................................................................................................... .8 3 Terms and definitions .................................................................................................... .8 4 Lightning current parameters ........................................................................................ 14 5 Damage due to lightning .............................................................................................. . 14 Damage to a structure ......................................................................................... 14 Effects of lightning on a structure ............................................................. 14 Sources and types of damage to a structure ............................................. 16 Damage to a service ............................................................................................ 17 Effects of lightning on a service............