1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication Protection against lightning Part 1: General principles BS EN 62305-1:2011BS EN 62305-1:2011 BRITISH STANDARD National foreword This British Standard is the UK implementation
2、of EN 62305-1:2011. It is identical to IEC 62305-1:2010. It supersedes BS EN 62305-1:2006, which will be withdrawn on 27 May 2012. Parts 1, 3 and 4 of EN 62305 contain references to EN 62305-2:2011. This reference is incorrect since Part 2 is not due to be published until 2012 to allow for the final
3、ization of the CENELEC common modifications. Until EN 62305-2:2012 is published and adopted as BS EN 62305-2:2012, the existing BS EN 62305-2:2006 can continue to be used with the newly published BS EN 62305-1:2011, BS EN 62305-3:2011 and BS EN 62305-4:2011. The UK participation in its preparation w
4、as entrusted to Technical Committee GEL/81, Protection against lightning. A list of organizations represented on this committee 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
5、application. Compliance with a British Standard cannot confer immunity from legal obligations. ISBN 978 0 580 61192 6 ICS 29.020; 91.120.40 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2011. BSI 2011 Amendments and Corrigenda issue
6、d since publication Date Text affected EUROPEAN STANDARD EN 62305-1 NORME EUROPENNE EUROPISCHE NORM February 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue
7、 Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62305-1:2011 E ICS 29.020; 91.120.40 Supersedes EN 62305-1:2006 + corr. Nov.2006English version Protection against lightning - Part 1: General prin
8、ciples (IEC 62305-1:2010, modified) Protection contre la foudre - Partie 1: Principes gnraux (CEI 62305-1:2010, modifie) Blitzschutz - Teil 1: Allgemeine Grundstze (IEC 62305-1:2010, modifiziert) This European Standard was approved by CENELEC on 2011-01-13. CENELEC members are bound to comply with t
9、he CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat
10、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 offi
11、cial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
12、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 62305-1:2011 - 2 - Foreword The text of document 81/370/FDIS, future edition 2 of IEC 62305-1, prepared by IEC TC 81, Lightning protection, was submitted to the IEC-CENELEC parallel vote and was approved by
13、 CENELEC as EN 62305-1 on 2011-01-13. This European Standard supersedes EN 62305-1:2006 + corr. Nov.2006. This EN 62305-1:2011 includes the following significant technical changes with respect to EN 62305-1:2006 + corr. Nov.2006: 1) It no longer covers protection of services connected to structures.
14、 2) Isolated interfaces are introduced as protection measures to reduce failure of electric and electronic systems. 3) First negative impulse current is introduced as a new lightning parameter for calculation purposes. 4) Expected surge overcurrents due to lightning flashes have been more accurately
15、 specified for low voltage power systems and for telecommunication systems. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following
16、 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) 2011-10-13 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-01-13 Annex ZA has been added
17、 by CENELEC. _ Endorsement notice The text of the International Standard IEC 62305-1:2010 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: 1 IEC 60664-1:2007 NOTE Harm
18、onized as EN 60664-1:2007 (not modified). 2 IEC 61000-4-5 NOTE Harmonized as EN 61000-4-5. 7 IEC 61643-1 NOTE Harmonized as EN 61643-11. 8 IEC 61643-21 NOTE Harmonized as EN 61643-21. _ - 3 - EN 62305-1:2011 Annex ZA (normative) Normative references to international publications with their correspon
19、ding European publications The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an internati
20、onal publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 62305-2 2010 Protection against lightning - Part 2: Risk management EN 62305-2 2011 IEC 62305-3 2010 Protection against lightning - Part 3: Physical damag
21、e to structures and life hazard EN 62305-3 2011 IEC 62305-4 2010 Protection against lightning - Part 4: Electrical and electronic systems within structures EN 62305-4 2011 2 62305-1 IEC:2010(E) CONTENTS FOREWORD . 5 INTRODUCTION 7 1 Scope . 8 2 Normative references . 8 3 Terms and definitions . 8 4
22、Lightning current parameters 14 5 Damage due to lightning . 14 5.1 Damage to a structure 14 5.1.1 Effects of lightning on a structure 14 5.1.2 Sources and types of damage to a structure . 16 5.2 Types of loss . 16 6 Need and economic justification for lightning protection 18 6.1 Need for lightning p
23、rotection 18 6.2 Economic justification of lightning protection . 19 7 Protection measures. 19 7.1 General 19 7.2 Protection measures to reduce injury of living beings by electric shock . 19 7.3 Protection measures to reduce physical damage 20 7.4 Protection measures to reduce failure of electrical
24、and electronic systems 20 7.5 Protection measures selection 20 8 Basic criteria for protection of structures 21 8.1 General 21 8.2 Lightning protection levels (LPL) 21 8.3 Lightning protection zones (LPZ) 23 8.4 Protection of structures 25 8.4.1 Protection to reduce physical damage and life hazard .
25、 25 8.4.2 Protection to reduce the failure of internal systems . 26 Annex A (informative) Parameters of lightning current . 27 Annex B (informative) Time functions of the lightning current for analysis purposes 38 Annex C (informative) Simulation of the lightning current for test purposes . 44 Annex
26、 D (informative) Test parameters simulating the effects of lightning on LPS components . 48 Annex E (informative) Surges due to lightning at different installation points . 62 Bibliography 67 Figure 1 Connection between the various parts of IEC 62305 . 7 Figure 2 Types of loss and corresponding risk
27、s resulting from different types of damage . 18 Figure 3 LPZ defined by an LPS (IEC 62305-3) . 24 Figure 4 LPZ defined by an SPM (IEC 62305-4) 25 Figure A.1 Definitions of impulse current parameters (typically T 2 2 ms) 27 Figure A.2 Definitions of long duration stroke parameters (typically 2 ms T L
28、ONG1 s) . 28 62305-1 IEC:2010(E) 3 Figure A.3 Possible components of downward flashes (typical in flat territory and to lower structures) 28 Figure A.4 Possible components of upward flashes (typical to exposed and/or higher structures) . 29 Figure A.5 Cumulative frequency distribution of lightning c
29、urrent parameters (lines through 95 % and 5 % value) 34 Figure B.1 Shape of the current rise of the first positive impulse 39 Figure B.2 Shape of the current tail of the first positive impulse . 40 Figure B.3 Shape of the current rise of the first negative impulse . 40 Figure B.4 Shape of the curren
30、t tail of the first negative impulse 41 Figure B.5 Shape of the current rise of the subsequent negative impulses 42 Figure B.6 Shape of the current tail of the subsequent negative impulses . 42 Figure B.7 Amplitude density of the lightning current according to LPL I . 43 Figure C.1 Example test gene
31、rator for the simulation of the specific energy of the first positive impulse and the charge of the long stroke . 45 Figure C.2 Definition of the current steepness in accordance with Table C.3 . 46 Figure C.3 Example test generator for the simulation of the front steepness of the first positive impu
32、lse for large test items . 47 Figure C.4 Example test generator for the simulation of the front steepness of the subsequent negative impulses for large test items 47 Figure D.1 General arrangement of two conductors for the calculation of electrodynamic force 54 Figure D.2 Typical conductor arrangeme
33、nt in an LPS. 55 Figure D.3 Diagram of the stresses F for the configuration of Figure D.2. 55 Figure D.4 Force per unit length F along the horizontal conductor of Figure D.2 . 56 Table 1 Effects of lightning on typical structures . 15 Table 2 Damage and loss relevant to a structure according to diff
34、erent points of strike of lightning . 17 Table 3 Maximum values of lightning parameters according to LPL 22 Table 4 Minimum values of lightning parameters and related rolling sphere radius corresponding to LPL . 22 Table 5 Probabilities for the limits of the lightning current parameters 23 Table A.1
35、 Tabulated values of lightning current parameters taken from CIGRE (Electra No. 41 or No. 69) 3, 431 Table A.2 Logarithmic normal distribution of lightning current parameters Mean and dispersion log calculated from 95 % and 5 % values from CIGRE (Electra No. 41 or No. 69) 3, 4. 32 Table A.3 Values o
36、f probability P as function of the lightning current I 33 Table B.1 Parameters for Equation (B.1). 38 Table C.1 Test parameters of the first positive impulse 45 Table C.2 Test parameters of the long stroke 45 Table C.3 Test parameters of the impulses . 46 Table D.1 Summary of the lightning threat pa
37、rameters to be considered in the calculation of the test values for the different LPS components and for the different LPL 49 Table D.2 Physical characteristics of typical materials used in LPS components 52 4 62305-1 IEC:2010(E) Table D.3 Temperature rise for conductors of different sections as a f
38、unction of W/R 52 Table E.1 Conventional earthing impedance values Z and Z 1 according to the resistivity of the soil . 63 Table E.2 Expected surge overcurrents due to lightning flashes on low-voltage systems . 64 Table E.3 Expected surge overcurrents due to lightning flashes on telecommunication sy
39、stems 65 62305-1 IEC:2010(E) 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PROTECTION AGAINST LIGHTNING Part 1: General principles FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC
40、National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, P
41、ublicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-gov
42、ernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC
43、 on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accep
44、ted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote internation
45、al uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the lat
46、ter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users shou
47、ld ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other dama
48、ge of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of
49、the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62305-1 has been prepared by IEC technical committee 81: Lightning protection. Thi
