1、81/263/FDISFINAL DRAFT INTERNATIONAL STANDARDPROJET FINAL DE NORME INTERNATIONALEProject number Numro de projet IEC 62305-2 Ed.1.0 IEC/TC or SC CEI/CE ou SC 81 Secretariat/Secrtariat Italy Submitted for parallel voting in CENELEC Soumis au vote parallle au CENELEC Distributed on/Diffus le 2005-08-19
2、 Voting terminates on/Vote clos le 2005-10-21 Also of interest to the following committees Intresse galement les comits suivants 37A,64,77 Supersedes document Remplace le document 81/241A/CDV -81/246A/RVC Functions concerned Fonctions concernes Safety Scurit EMC CEM Environment Environnement Quality
3、 assurance Assurance de la qualit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION LECTROTECHNIQUE INTERNATIONALE THIS DOCUMENT IS A DRAFT DISTRIBUTED FOR APPROVAL.IT MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE F
4、OR INDUSTRIAL,TECHNOLOGICAL,COMMERCIAL AND USER PURPOSES,FINAL DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.CE DOCUMENT EST UN PROJET DIFFUS POUR APPROBATION.IL NE PEUT T
5、RE CIT COMME NORME INTERNATIONALE AVANT SA PUBLICATION EN TANT QUE TELLE.OUTRE LE FAIT DTRE EXAMINS POUR TABLIR SILS SONT ACCEPTABLES DES FINS INDUSTRIELLES,TECHNOLOGIQUES ET COMMERCIALES,AINSI QUE DU POINT DE VUE DES UTILISATEURS,LES PROJETS FINAUX DE NORMES INTERNATIONALES DOIVENT PARFOIS TRE EXAM
6、INS EN VUE DE LEUR POSSIBILIT DE DEVENIR DES NORMES POUVANT SERVIR DE RFRENCE DANS LES RGLEMENTATIONS NATIONALES.Title IEC 62305-2 Ed.1.0:Protection against lightning Part 2:Risk management Titre CEI 62305-2 Ed.1.0:Protection contre la foudre Partie 2:Evaluation des risques IEC CO note:Please read t
7、he important information on the Risk Assessment Calculator software given on page 1A.ATTENTION VOTE PARALLLE CEI CENELEC Lattention des Comits nationaux de la CEI,membres du CENELEC,est attire sur le fait que ce projet final de Norme internationale est soumis au vote parallle.Un bulletin de vote spa
8、r pour le vote CENELEC leur sera envoy par le Secrtariat Central du CENELEC.ATTENTION IEC CENELEC PARALLEL VOTING The attention of IEC National Committees,members of CENELEC,is drawn to the fact that this final Draft International Standard(DIS)is submitted for parallel voting.A separate form for CEN
9、ELEC voting will be sent to them by the CENELEC Central Secretariat.Copyright 2005 International Electrotechnical Commission,IEC.All rights reserved.It is permitted to download this electronic file,to make a copy and to print out the content for the sole purpose of preparing National Committee posit
10、ions.You may not copy or mirror the file or printed version of the document,or any part of it,for any other purpose without permission in writing from IEC.-1A-81/263/FDIS 62305-2-fdis-covpage-mjc-v3-final.doc 17/08/2005 IEC 62305-2-INFORMATION ON RISK ASSESSMENT CALCULATOR SOFTWARE The Risk Assessme
11、nt Calculator software is circulated as a zip file.It can also be downloaded from an ftp server site set-up by the IEC CO for this purpose by using the link with username included as.ftp:/riskmemftp.iec.ch Please note that:the data base of the software is password protected,the expiry date for the s
12、oftware has been set for 150 days,on the Toolbar of the software under“Library”,the user is able to obtain PDF copies of the English and French versions of the FDIS,the software will be taken off the ftp server site at the end of the voting period of the FDIS.Upon the final publication,the ftp serve
13、r site will be used to supply updates of the software for purchasers of the standard.Finally please note:The software is purely provided to assist in a simplified implementation of the standard and should in no way be construed as a substitute for the written standard.62305-2/FDIS IEC 2 CONTENTS FOR
14、EWORD.7 INTRODUCTION.9 1 Scope.11 2 Normative references.11 3 Terms,definitions,symbols and abbreviations.11 4 Explanation of terms.20 4.1 Damage and loss.21 4.2 Risk and risk components.23 4.3 Composition of risk components related to a structure.25 4.4 Composition of risk components related to a s
15、ervice.27 4.5 Factors influencing the risk components.28 5 Risk management.29 5.1 Basic procedure.29 5.2 Structure to be considered for risk assessment.29 Protection does not include connected services outside of the structure.29 5.3 Service to be considered for risk assessment.29 5.4 Tolerable risk
16、 RT.30 5.5 Specific procedure to evaluate the need of protection.30 5.6 Procedure to evaluate the cost effectiveness of protection.31 5.7 Protection measures.33 5.8 Selection of protection measures.33 6 Assessment of risk components for a structure.36 6.1 Basic equation.36 6.2 Assessment of risk components due to flashes to the structure(S1).36 6.3 Assessment of the risk component due to flashes near the structure(S2).36 6.4 Assessment of risk components due to flashes to a line connected to the
