IEC_62305-4.pdf

FORM FDIS(IEC)/FORMULAIRE FDIS(CEI)2002-08-08 81/265/FDISFINAL DRAFT INTERNATIONAL STANDARDPROJET FINAL DE NORME INTERNATIONALEProject number Numro de projet IEC 62305-4 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 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 81/238/CDV -81/243A/RVC Functions concerned Fonctions concernes Safety Scurit EMC CEM Environment Environnement Quality 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 FOR 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 TRE 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 EXAMINS EN VUE DE LEUR POSSIBILIT DE DEVENIR DES NORMES POUVANT SERVIR DE RFRENCE DANS LES RGLEMENTATIONS NATIONALES.Title IEC 62305-4 Ed.1.0:Protection against lightning Part 4:Electrical and electronic systems within structures Titre CEI 62305-4 Ed.1.0:Protection contre la foudre Partie 4:Rseaux de puissance et de communication dans les structures 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 spar 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 CENELEC 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 positions.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.62305-4/FDIS IEC 2 CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.9 2 Normative references.9 3 Terms and definitions.10 4 Design and installation of a LEMP protection measures system(LPMS).12 4.1 Design of an LPMS.16 4.2 Lightning protection zones(LPZ).16 4.3 Basic protection measures in an LPMS.20 5 Earthing and bonding.20 5.1 Earth termination system.21 5.2 Bonding network.22 5.3 Bonding bars.27 5.4 Bonding at the boundary of an LPZ.28 5.5 Material and dimensions of bonding components.28 6 Magnetic shielding and line routing.29 6.1 Spatial shielding.29 6.2 Shielding of internal lines.29 6.3 Routing of internal lines.29 6.4 Shielding of external lines.30 6.5 Material and dimensions of magnetic shields.30 7 Coordinated SPD protection.30 8 Management of an LPMS.31 8.1 LPMS management plan.31 8.2 Inspection of an LPMS.33 8.3 Maintenance.34 Annex A(informative)Basics for evaluation of electromagnetic environment in a LPZ.35 Annex B(informative)Implementation of LEMP protection measures for electronic systems in existing structures.61 Annex C(informative)SPD coordination.78 Annex D(informative)Selection and installation of a coordinated SPD protection.96 Bibliography.101 Figure 1 General principle for the division into different LPZ.13 Figure 2 Protection against LEMP Examples of possible LEMP protection measures systems(LPMS).15 Figure 3 Examples for interconnected LPZ.18 Figure 4 Examples for extended lightning protection zones.19 Figure 5 Example of a three-dimensional earthing system consisting of the bonding network interconnected with the earth termination system.21 Figure 6 Meshed earth termination system of a plant.22 Figure 7 Utilization of reinforcing rods of a structure for equipotential bonding.24 62305-4/FDIS IEC 3 Figure 8 Equipotential bonding in a structure with steel reinforcement.25 Figure 9 Integration of electronic systems into the bonding network.26 Figure 10 Combinations of integration methods of electronic systems into the bonding network.27 Figure A.1 LEMP situation due to lightning strike.37 Figure A.2 Simulation of the rise of magnetic field by damped oscillations.39 Figure A.3 Larg