SIST EN IEC 62305-1:2024
(Main)Protection against lightning - Part 1: General principles
Protection against lightning - Part 1: General principles
This part of IEC 62305 provides general principles for the protection of structures against lightning, including their installations and contents, as well as persons.
The following cases are outside the scope of this document:
- railway systems;
- vehicles, ships, aircraft, offshore installations;
- underground high-pressure pipelines;
− pipe, power and telecommunication lines placed outside the structure;
− nuclear power plants.
NOTE 1 In these cases, structures usually fall under special regulations produced by various specialized authorities. The IEC 62305 series is generally considered as a minimum requirement for these structures. For structures (subsidiary or others) not falling under such special regulations, IEC 62305 still applies.
NOTE 2 Lightning protection of wind turbines is also covered by IEC 61400-24 [14].
NOTE 3 Until any further information by CIGRE is available the lightning current parameters described in this standard may be applied also for offshore installations.
Blitzschutz - Teil 1: Allgemeine Grundsätze
Protection contre la foudre - Partie 1: Principes généraux
L'IEC 62305-1:2024 fournit des principes généraux de protection des structures contre la foudre, y compris leurs installations, leur contenu et les personnes qui s'y trouvent.
Les cas suivants ne relèvent pas du domaine d'application du présent document:
- chemins de fer;
- véhicules, navires, avions, installations en mer;
- canalisations enterrées à haute pression;
- canalisations, lignes de puissance et de communication séparées de la structure;
- centrales nucléaires de puissance.
Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) à l'Annexe D, il est fait référence à la série IEC 62561 pour faire le lien avec les composants des systèmes de protection contre la foudre correspondants selon la série IEC 62561;
b) la gestion des risques introduit le concept des types de pertes qui revêtent une importance publique;
c) introduction du concept de fréquence des dommages qui peuvent influencer la disponibilité des réseaux internes à la structure;
d) les courants de surcharge dus aux coups de foudre ont été spécifiés avec davantage de précision pour le dimensionnement des SPD dans des systèmes d'alimentation basse tension et dans les réseaux de communication.
Zaščita pred delovanjem strele - 1. del: Splošna načela
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2024
Nadomešča:
SIST EN 62305-1:2011
SIST EN 62305-1:2011/AC:2016
Zaščita pred delovanjem strele - 1. del: Splošna načela
Protection against lightning - Part 1: General principles
Blitzschutz - Teil 1: Allgemeine Grundsätze
Protection contre la foudre - Partie 1: Principes généraux
Ta slovenski standard je istoveten z: EN IEC 62305-1:2024
ICS:
91.120.40 Zaščita pred strelo Lightning protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62305-1
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2024
ICS 29.020; 91.120.40 Supersedes EN 62305-1:2011;
EN 62305-1:2011/AC:2016-11
English Version
Protection against lightning - Part 1: General principles
(IEC 62305-1:2024)
Protection contre la foudre - Partie 1: Principes généraux Blitzschutz - Teil 1: Allgemeine Grundsätze
(IEC 62305-1:2024) (IEC 62305-1:2024)
This European Standard was approved by CENELEC on 2024-10-17. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62305-1:2024 E
European foreword
The text of document 81/737/FDIS, future edition 3 of IEC 62305-1, prepared by TC 81 "Lightning
protection" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-10-31
document have to be withdrawn
This document supersedes EN 62305-1:2011 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62305-1:2024 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 standard indicated:
IEC 62561 series NOTE Approved as EN IEC 62561 series
IEC 62305-2:2024 NOTE Approved as EN IEC 62305-2:2024 (not modified)
IEC 62793 NOTE Approved as EN IEC 62793
IEC 61400-24 NOTE Approved as EN IEC 61400-24
IEC 61000-4-5 NOTE Approved as EN 61000-4-5
IEC 61643-31 NOTE Approved as EN 61643-31
IEC 62475 NOTE Approved as EN 62475
IEC 60071-2:2023 NOTE Approved as EN IEC 60071-2:2023 (not modified)
IEC 61643-21 NOTE Approved as EN 61643-21
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 62305-3 2024 Protection against lightning - Part 3: EN IEC 62305-3 2024
Physical damage to structures and life
hazard
IEC 62305-4 2024 Protection against lightning - Part 4: EN IEC 62305-4 2024
Electrical and electronic systems within
structures
IEC 62305-1 ®
Edition 3.0 2024-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Protection against lightning –
Part 1: General principles
Protection contre la foudre –
Partie 1: Principes généraux
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020, 91.120.40 ISBN 978-2-8322-8002-7
– 2 – IEC 62305-1:2024 © IEC 2024
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 10
4 Lightning current parameters . 17
5 Damage due to lightning . 18
5.1 Damage to a structure . 18
5.1.1 General . 18
5.1.2 Effects of lightning on a structure . 18
5.1.3 Sources and causes of damage to a structure . 19
5.2 Types of loss . 20
6 Need for lightning protection . 21
6.1 Risk and frequency . 21
6.2 Need for lightning protection for reduction of risk R . 22
6.3 Need for lightning protection for reduction of frequency of damage F . 22
7 Protection measures . 23
7.1 General . 23
7.2 Protection measures to reduce injury to human beings by electric shock . 23
7.3 Protection measures to reduce physical damage. 24
7.4 Protection measures to reduce failure of internal systems . 24
7.5 Protection measures selection . 24
8 Basic criteria for protection of structures . 24
8.1 General . 24
8.2 Lightning protection levels (LPLs) . 25
8.3 Lightning protection zones (LPZs) . 27
8.4 Protection of structures . 29
8.4.1 Protection to reduce physical damage and life hazard . 29
8.4.2 Protection to reduce the failure of internal systems . 30
Annex A (informative) Parameters of lightning current . 31
A.1 Lightning flashes to earth . 31
A.2 Lightning current parameters . 34
A.3 Fixing the maximum lightning current parameters for LPL I . 39
A.3.1 General . 39
A.3.2 First positive stroke and long stroke . 39
A.3.3 First negative stroke . 40
A.3.4 Subsequent stroke . 40
A.4 Fixing the minimum lightning current parameters . 40
Annex B (informative) Time functions of the lightning current for analysis purposes . 42
Annex C (informative) Simulation of the lightning current for test purposes . 47
C.1 General . 47
C.2 Simulation of the specific energy of the first positive stroke and the charge of
the long stroke . 47
C.3 Simulation of the front current steepness of the impulses . 48
IEC 62305-1:2024 © IEC 2024 – 3 –
Annex D (informative) Test parameters simulating the effects of lightning current on
LPS components . 51
D.1 General . 51
D.2 Current parameters relevant to the point of strike . 51
D.3 Current sharing . 52
D.4 Effects of lightning current causing possible damage . 53
D.4.1 Thermal effects . 53
D.4.2 Mechanical effects . 57
D.4.3 Combined effects . 61
D.4.4 Sparking . 61
D.4.5 Soil ionization . 61
D.5 LPS components, relevant problems and test parameters . 61
D.5.1 General . 61
D.5.2 Air terminations . 61
D.5.3 Down conductors . 62
D.5.4 Connecting components . 63
D.5.5 Earth terminations . 64
D.6 Surge protective devices (SPDs) . 64
D.6.1 General . 64
D.6.2 SPD containing spark gaps . 64
D.6.3 SPD containing metal-oxide varistors . 65
D.7 Summary of the test parameters to be adopted in testing LPS components . 66
Annex E (informative) Surge currents due to lightning at different installation points . 67
E.1 General . 67
E.2 Surge currents due to flashes to the structure (source of damage S1) . 67
E.2.1 Surge currents flowing through external conductive parts and lines
connec
...
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