IEC_61024-1-1-1993_PARTE_1-1.pdf

IEC 1024 PT*1-19348448910541411145NORMECEIINTERNATIONALEIECINTERNATIONAL1024-1-1STANDARDPremiere editionFirst edition1993-08Protection des structures contre la foudrePartie 1:Principes generauxSection 1:Guide A-Choix des niveauxde protection pour les installations de protectioncontre la foudreProtection of structures against lightningPart 1:General principlesSection 1:Guide A-Selection of protectionlevels for lightning protection systemsIECNumero de referenceReference numberCEI/IEC 1024-1-1:1993IEC1024PT*1-39348448910541412081Revision de la presente publicationRevision of this publicationLe contenu technique des publications de la CEI est cons-The technical content of IE C publications is kept under con-tamment revu par la Commission afin dassurer quil reflete bienstant review by the IEC,thus ensuring that the content reflects1etat actuel de la technique.current technology.Les renseignements relatifs a ce travail de revision,aInformation on the work of revision,the issue of revised edi-Ietablissement des editions revisees et aux mises a jour peuventtions and amendment sheets may be obtained from IECetre obtenus aupres des Comites nationaux de la CEI et enNational Committees and from the following IE C sources:consultant les documents ci-dessous:Bulletin de la CEIIE C BulletinAnnuaire de la C EIIE C YearbookCatalogue des publications de la CEICatalogue of IE C PublicationsPublie annuellementPublished yearlyTerminologieTerminologyEn ce qui conceme la terminologie generale,le lecteur seFor general terminology,readers are referred to IEC Publi-reportera a la Publication 50 de la CEI:Vocabulaire Electro-cation 50:Intemational Electrotechnical Vocabulary(IEV),technique International(VEI),qui est etablie sous forme dewhich is issued in the form of separate chapters each dealingchapitres separes traitant chacun dun sujet defini,IIndexwith a specific field,the General Index being published as ageneral etant publie separement.Des details complets sur le VEIseparate booklet.Full details of the IEV will be supplied onpeuvent etre obtenus sur demande.request.Les termes et definitions figurant dans la presente publicationThe terms and definitions contained in the present publicationont ete soit repris du VEI,soit specifiquement approuves aux finshave either been taken from the IEV or have been specificallyde cette publication.approved for the purpose of this publication.Symboles graphiques et litterauxGraphical and letter symbolsPour les symboles graphiques,symboles litteraux et signesFor graphical symbols,and letter symbols and signs approveddusage general approuves par la CEI.le lecteur consultera:by the IEC for general use,readers are referred to:-la Publication 27 de la C E I:Symboles litteraux a utiliser en-IEC Publication 27:Letter symbols to be used in electricalelectrotechnique;technology:-la Publication 617 de la CEI:Symboles graphiques pour-IE C Publication 617:Graphical symbols for diagramsschemas.Les symboles et signes contenus dans la presente publicationThe symbols and signs contained in the present publicationont te soit repris des Publications 27 ou 617 de la CEI,soithave either been taken from IEC Publications 27 or 617,orspecifiquement approuves aux fins de cette publication.have been specifically approved for the purpose of this publication.Publications de la C EI etablies par le memeI E C publications prepared by the sameComite dEtudesTechnical CommitteeLattention du lecteur est attiree sur le deuxieme feuillet de laThe attention of readers is drawn to the back cover,whichcouverture,qui enumere les publications de la CEI prepareeslists I EC publications issued by the Technical Committeepar le Comite dEtudes qui a tabli la presente publication.which has prepared the present publication.IEC 1024 PT*1-1 934844891 0541413T18NORMECEIINTERNATIONALEIECINTERNATIONAL1024-1-1STANDARDPremiere editionFirst edition1993-08Protection des structures contre la foudrePartie 1:Principes generauxSection 1:Guide A-Choix des niveauxde protection pour les installations de protectioncontre la foudreProtection of structures against lightningPart 1:General principlesSection 1:Guide A-Selection of protectionlevels for lightning protection systemsCEI 1990 Droits de reproduction rservs-Copyright-all rights reservedAucune parte de cette publication ne peut etre reproduite ni No part of this publication may be reproduced or utilized inutilisee sous quekque forme que ce soit et par aucun pro-any form or by any means,electronic or mechanical,cede,electronique ou mecanique,y compris la photocope etincluding photocopying and microfilm,without permissionles microfilms,sans Iaccord ecrt de lediteur.in writing from the publisherBureau Central de la Commission Electrotechnique Internationale 3,rue de Varembe Geneve,SuisseCommission Electrotechnique InternationaleCODE PRIXIECInternational Electrotechnical CommissionPRICE CODESMemayHapoAHa 3neTpoTexHecKaR HoMHCCHPour prix,voir catalogue en vigueurFor price,see current catalogueIEC 1024 PT*1-1 9348448910541414954-2-1024-1-1CEI:1993SOMMAIREPagesAVANT-PROPOS4INTRODUCTION.6Articles1 Generalites81.1 Domaine dapplication et objet81.2 Termes et definitions82 Classification des structures102.1 Structures habituelles102.2 Structures particulieres103 Caracteristiques de la foudre163.1 Caracteristiques des courants de foudre utilises pour dimensionner lesinstallations de protection contre la foudre(IPF).163.2 Densite des coups de foudre au sol.164 Choix des niveaux de protection pour les installations de protectioncontre la foudre(IPF).184.1 Frequence accepte des coups de foudre(N)sur une structure.184.2 Frequence previsible(Ng)des coups de foudre directssur une structure.204.3 Procedure de choix des IPF22Figures.26Annexe A-Valeurs fondamentales des caractristiques du courant de foudre-Frequence cumulee de distribution.34IEC 1024 PT*1-193484489105414158901024-1-1IEC:1993-3-CONTENTSPageFOREWORD5INTRODUCTION7Clause1 General91.1 Scope and object91.2 Terms and definitions92 Classification of structures.112.1 Common structures112.2 Special structures.113 Lightning parameters.173.1 Lightning current parameters used for dimensioning LightningProtection Systems(LPS)173.2 Lightning ground flash density174 Selection of protection levels for Lightning Protection Systems(LPS.194.1 Accepted frequency of lightning flashes(N)to a structture.194.2 Expected frequency(Ng)of direct lightning flashes to a structure.214.3 Procedure for selection of LPS23Figures.26Annex A-Basic values of lightning current parameters-Cumulative frequencydistribution.35