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ПІДТВЕРДЖУВАЛЬНЕ ПОВІДОМЛЕННЯ

Наказом Міністерства економічного розвитку і торгівлі України
від 28.05.2012 № 640

Європейський стандарт

EN 62305-1:2011

en: Protection against lightning — Part 1: General principles

прийнято як національний стандарт методом «підтвердження»
мовою оригіналу за національним позначенням

ДСТУ EN 62305-1:2012

uk: Захист від блискавки. Частина 1. Загальні принципи
(EN 62305-1:2011, IDT)

з наданням чинності в Україні від 2012-08-01

73EUROPEAN STANDARD

NORME EUROPEENNE EUROPAISCHE NORM

ICS 29.020; 91.120.40

EN 62305-1

February 2011

Supersedes EN 62305-1:2006 + corr. Nov.2006

English version

Protection against lightning -
Part 1: General principles

(IEC 62305-1:2010, modified)

Protection contre la foudre - Blitzschutz -

Partie 1: Principes generaux Teil 1: Allgemeine Grundsatze

(CEI 62305-1:2010, modifiee) (IEC 62305-1:2010, modifiziert)

This European Standard was approved by CENELEC on 2011-01-13. CENELEC members are bound to comply with the 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 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 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, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom.

CENELEC

European Committee for Electrotechnical Standardization
Comite Europeen de Normalisation Electrotechnique
Europaisches Komitee fur Elektrotechnische Normung

Management Centre: Avenue Mamix 17, В -1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Foreword

The text of document 81/370/FDIS, future edition 2 of IEC 62305-1, prepared by IECTC81, Lightning protection, was submitted to the IEC-CENELEC parallel vote and was approved by 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.

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 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 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 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:

Annex ZA

(normative)

Normative references to international publications
with their corresponding 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 international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.

Part 4: Electrical and electronic systems within structures

INTERNATIONAL STANDARD

Protection against lightning - Part 1: General principles

ІЕС 62305-1:2010(Е)

ІЕС 62305-1

Edition 2.0 2010-12

_Д

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IEC 62305-1

Edition 2.0 2010-12

INTERNATIONAL

STANDARD

Protection against lightning - Part 1: General principles

INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

PRICE CODE XB

ICS 29.020; 91.120.40

ISBN 978-2-88912-280-6

® Registered trademark of the International Electrotechnical Commission

CONTENTS

FOREWORD 5

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

   1. Damage to a structure 14

      1. Effects of lightning on a structure 14

      2. Sources and types of damage to a structure 16

   2. Types of loss 16

6. Need and economic justification for lightning protection 18

   1. Need for lightning protection 18

   2. Economic justification of lightning protection 19

7. Protection measures 19

   1. General 19

   2. Protection measures to reduce injury of living beings by electric shock 19

   3. Protection measures to reduce physical damage 20

   4. Protection measures to reduce failure of electrical and electronic systems 20

   5. Protection measures selection 20

8. Basic criteria for protection of structures 21

   1. General 21

   2. Lightning protection levels (LPL) 21

   3. Lightning protection zones (LPZ) 23

   4. Protection of structures 25

      1. Protection to reduce physical damage and life hazard 25

      2. Protection to reduce the failure of internal systems 26

1. (informative) Parameters of lightning current 27

2. (informative) Time functions of the lightning current for analysis purposes 38

3. (informative) Simulation of the lightning current for test purposes 44

Annex 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 risks 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 ?2 < 2 ms) 27

Figure A.2 - Definitions of long duration stroke parameters (typically 2 ms <T|_q^q <1 s) 28

Figure А.З - 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 current 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 current 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 generator 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 impulse 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 arrangement 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

1. - Effects of lightning on typical structures 15

2. - Damage and loss relevant to a structure according to different points of strike of lightning 17

3. - Maximum values of lightning parameters according to LPL 22

4. - Minimum values of lightning parameters and related rolling sphere radius corresponding to LPL 22

5. - Probabilities for the limits of the lightning current parameters 23

1. 1 - Tabulated values of lightning current parameters taken from CIGRE (Electra No. 41 or No. 69) I³J> t⁴l 31

Table A.2 - Logarithmic normal distribution of lightning current parameters - Mean ц and dispersion Ст|дд calculated from 95 % and 5 % values from CIGRE (Electra No.

41 or No. 69) [3]. [41^а. 32

Table A.3 - Values of probability P as function of the lightning current 1 33

2. 1 - Parameters for Equation (B.1) 38

3. 1 - Test parameters of the first positive impulse 45

4. 2 - Test parameters of the long stroke 45

5. 3 - Test parameters of the impulses 46

6. 1 - Summary of the lightning threat parameters to be considered in the

calculation of the test values for the different LPS components and for the different LPL49

4. Table D.2 - Physical characteristics of typical materials used in LPS components 523 - Temperature rise for conductors of different sections as a function of

4. W/R 52

5. 1 - Conventional earthing impedance values Z and Z-| 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 systems 65INTERNATIONAL 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 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, Publicly 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-governmental 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 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 accepted 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 international 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 latter.

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 should 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 damage 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 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.

This second edition cancels and replaces the first edition, published in 2006, and constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous edition:

1. It no longer covers protection of services connected to structures.

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 specified for low voltage power systems and for telecommunication systems.

The text of this standard is based on the following documents:

Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all the parts in the IEC 62305 series, under the general title Protection against lightning, can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be

• reconfirmed,

• withdrawn,

• replaced by a revised edition, or

• amended.

A bilingual version of this standard may be issued at a later date.INTRODUCTION

There are no devices or methods capable of modifying the natural weather phenomena to the extent that they can prevent lightning discharges. Lightning flashes to, or nearby, structures (or lines connected to the structures) are hazardous to people, to the structures themselves, their contents and installations as well as to lines. This is why the application of lightning protection measures is essential.

The need for protection, the economic benefits of installing protection measures and the selection of adequate protection measures should be determined in terms of risk management. Risk management is the subject of IEC 62305-2.

Protection measures considered in IEC 62305 are proved to be effective in risk reduction.

All measures for protection against lightning form the overall lightning protection. For practical reasons the criteria for design, installation and maintenance of lightning protection measures are considered in two separate groups:

• the first group concerning protection measures to reduce physical damage and life hazard in a structure is given in IEC 62305-3;

• the second group concerning protection measures to reduce failures of electrical and electronic systems in a structure is given in IEC 62305-4.

The connection between the parts of IEC 62305 is illustrated in Figure 1.

Lightning risk

Figure 1 - Connection between the various parts of IEC 62305

Protection measures

Lightning protection

The lightning threat

PROTECTION AGAINST LIGHTNING -

Part 1: General principles

1. Scope

This part of IEC 62305 provides general principles to be followed for protection of structures against lightning, including their installations and contents, as well as persons.