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ПІДТВЕРДЖУВАЛЬНЕ ПОВІДОМЛЕННЯ

Наказом Міністерства економічного розвитку і торгівлі України
від 28.05.2012 № 640

Європейський стандарт

EN 62305-4:2011

en: Protection against lightning — Part 4: Electrical and electronic systems
within structures

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

ДСТУ EN 62305-4:2012

uk: Захист від блискавки. Частина 4. Електричні та електронні системи,
розташовані в будинках і спорудах (EN 62305-4:2011, IDT)

з наданням чинності в Україні від 2012-08-01EUROPEAN STANDARD

NORME EUROPEENNE EUROPAISCHE NORM

ICS 29.020; 91.120.40

EN 62305-4

February 2011

Supersedes EN 62305-4:2006 + corr. Nov.2006

English version

Protection against lightning -
Part 4: Electrical and electronic systems within structures
(IEC 62305-4:2010, modified)

Protection contre la foudre -

Partie 4: Reseaux de puissance et de communication dans les structures (CEI 62305-4:2010, modifiee)

Blitzschutz - Teil 4: Elektrische und elektronische Systeme in baulichen Anlagen

(IEC 62305-4:2010, 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 Marnix 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 81/373/FDIS, future edition 2 of IEC 62305-4, prepared by IECTC81, Lightning protection, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62305-4 on 2011-01-13.

This European Standard supersedes EN 62305-4:2006 + corr. Nov.2006.

This EN 62305-4:2011 includes the following significant technical changes with respect to EN 62305-4:2006 + corr. Nov.2006:

1. Isolating interfaces capable of reducing conducted surges on lines entering the structure are introduced.

2. Minimum cross-sections for bonding components are slightly modified.

3. First negative impulse current is introduced for calculation purposes as electromagnetic source of harm to the internal systems.

4. Selection of SPD with regard to voltage protection level is improved to take into account oscillation and induction phenomena in the circuit downstream of SPD.

5. Annex C dealing with SPD coordination is withdrawn and referred back to SC 37A.

6. A new informative Annex D is introduced giving information on factors to be considered in the selection of SPDs.

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 62305-4:2010 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:

[2] IEC 61000 series NOTE Harmonized in EN 61000 series (partially modified).

[8] IEC 61643-11 NOTE Harmonized as EN 61643-11

.

ІЕС 62305-4

Edition 2.0 2010-12

INTERNATIONAL STANDARD

Protection against lightning -

Part 4: Electrical and electronic systems within structure

s

ІЕС 62305-4:2010(E)

_Д

ТНІ8 PUBLICATION IS COPYRIGHT PROTECTED

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Edition 2.0 2010-12

INTERNATIONAL STANDARD

Protection against lightning -

Part 4: Electrical and electronic systems within structures

INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

PRICE CODE xc

ICS 29.020; 91.120.40

ISBN 978-2-88912-283-7

® Registered trademark of the International Electrotechnical CommissionCONTENTS

FOREWORD 5

INTRODUCTION 7

1. Scope 9

2. Normative references 9

3. Terms and definitions 10

4. Design and installation of SPM 13

   1. General 13

   2. Design of SPM 16

   3. Lightning protection zones (LPZ) 17

   4. Basic SPM 20

5. Earthing and bonding 21

   1. General 21

   2. Earth-termination system 22

   3. Bonding network 24

   4. Bonding bars 28

   5. Bonding at the boundary of an LPZ 29

   6. Material and dimensions of bonding components 29

6. Magnetic shielding and line routing 30

   1. Spatial shielding 30

   2. Shielding of internal lines 30

   3. Routing of internal lines 30

   4. Shielding of external lines 31

   5. Material and dimensions of magnetic shields 31

7. Coordinated SPD system 31

8. Isolating interfaces 32

9. SPM management 32

   1. General 32

   2. SPM management plan 32

   3. Inspection of SPM 33

      1. Inspection procedure 34

      2. Inspection documentation 34

   4. Maintenance 35

1. (informative) Basis of electromagnetic environment evaluation in an LPZ 36

2. (informative) Implementation of SPM for an existing structure 60

3. (informative) Selection and installation of a coordinated SPD system 76

4. (informative) Factors to be considered in the selection of SPDs 82

Bibliography 87

1. - General principle for the division into different LPZ 13

2. - Examples of possible SPM (LEMP protection measures) 15

3. - Examples for interconnected LPZ 19

4. - Examples for extended lightning protection zones 20

5. - Example of a three-dimensional earthing system consisting of the bonding network interconnected with the earth-termination system 22

6. - Meshed earth-termination system of a plant 23

7. - Utilization of reinforcing rods of a structure for equipotential bonding 25

8. - Equipotential bonding in a structure with steel reinforcement 26

9. - Integration of conductive parts of internal systems into the bonding network 27

10. - Combinations of integration methods of conductive parts of internal systems into the bonding network 28

Figure A.1 - LEMP situation due to lightning strike 37

Figure A.2 - Simulation of the rise of magnetic field by damped oscillations 40

Figure A.3 - Large volume shield built by metal reinforcement and metal frames 41

Figure A.4 - Volume for electrical and electronic systems inside an inner LPZ n 42

Figure A.5 - Reducing induction effects by line routing and shielding measures 43

Figure A.6 - Example of SPM for an office building 45

Figure A.7 - Evaluation of the magnetic field values in case of a direct lightning strike 46

Figure A.8 - Evaluation of the magnetic field values in case of a nearby lightning strike 48

Figure A.9 - Distance s_a depending on rolling sphere radius and structure dimensions 50

Figure A.11 - Magnetic field strength H_1/MAX inside a grid-like shield type 1 53

Figure A.12 - Magnetic field strength H_1/MAX inside a grid-like shield type 1 according to mesh width 53

Figure A.13 - Low-level test to evaluate the magnetic field inside a shielded structure 55

Figure A.14 - Voltages and currents induced into a loop formed by lines 56

Figure D.2 - Basic example for different sources of damage to a structure and lightning

current distribution within a system 84

Figure D.3 - Basic example of balanced current distribution 85

1. - Minimum cross-sections for bonding components 30

2. - SPM management plan for new buildings and for extensive changes in construction or use of buildings 33

Table A.1 - Parameters relevant to source of harm and equipment 38

Table A.2 - Examples for /_0/MAX = 100 kA and w_m = 2 m 48

Table A.3 - Magnetic attenuation of grid-like spatial shields for a plane wave 49

Table A.5 - Examples for /_0/Мах ⁼ Ю0 kA and w_m = 2 m corresponding to SF = 12,6 dB 51

Table D. 1 - Preferred values of /_imp 82INTERNATIONAL ELECTROTECHNICAL COMMISSION

PROTECTION AGAINST LIGHTNING -
Part 4: Electrical and electronic systems within structures

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 non­governmental 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 62305-4 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. Isolating interfaces capable of reducing conducted surges on lines entering the structure are introduced.

2. Minimum cross-sections for bonding components are slightly modified.

3. First negative impulse current is introduced for calculation purposes as electromagnetic source of harm to the internal systems.

4. Selection of SPD with regard to voltage protection level is improved to take into account oscillation and induction phenomena in the circuit downstream of SPD.