EN IEC 62858:2019

SLOVENSKI STANDARD
01-januar-2020
Nadomešča:
SIST EN 62858:2016
Pogostost strele na osnovi sistemov za lokacijo strel (LLS) - Splošna načela
Lightning density based on lightning location systems (LLS) - General principles
Blitzhäufigkeit basierend auf Blitzortungssystemen - Allgemeine Grundsätze
Densité de foudroiement basée sur des systèmes de localisation de la foudre (LLS) -
Principes généraux
Ta slovenski standard je istoveten z: EN IEC 62858:2019
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 62858

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2019
ICS 91.120.40; 29.020 Supersedes EN 62858:2015 and all of its amendments
and corrigenda (if any)
English Version
Lightning density based on lightning location systems (LLS) -
General principles
(IEC 62858:2019)
Densité de foudroiement basée sur des systèmes de Blitzhäufigkeit basierend auf Blitzortungssystemen -
localisation de la foudre (LLS) - Principes généraux Allgemeine Grundsätze
(IEC 62858:2019) (IEC 62858:2019)
This European Standard was approved by CENELEC on 2019-11-13. 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 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,
Turkey 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62858:2019 E
European foreword
The text of document 81/627A/FDIS, future edition 2 of IEC 62858, prepared by IEC/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) 2020-08-13
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-11-13
document have to be withdrawn
This document supersedes EN 62858:2015 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.

Endorsement notice
The text of the International Standard IEC 62858:2019 was approved by CENELEC as a European
Standard without any modification.

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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 62305-1 -  Protection against lightning - Part 1: EN 62305-1 -
General principles
IEC 62305-2 -  Protection against lightning - Part 2: Risk EN 62305-2 -
management
IEC 62858 ®
Edition 2.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Lightning density based on lightning location systems – General principles

Densité de foudroiement basée sur des systèmes de localisation

de la foudre (LLS) – Principes généraux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.020; 91.120.40 ISBN 978-2-8322-7457-6

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CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, abbreviated terms and symbols . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms and symbols . 7
4 General requirements . 7
4.1 General . 7
4.2 Stroke-to-flash grouping . 8
4.3 Minimum observation periods . 9
4.4 Observation area . 9
4.5 Grid cell size . 9
4.6 Edge effect correction . 9
5 Validation of lightning location system performance characteristics . 10
Annex A (informative) Determination of lightning density for risk calculation . 12
Annex B (informative) Ground strike points (GSPs) explanations and calculation
methods . 13
Bibliography . 14

Figure A.1 – High resolution full climatology (HRFC) N data. 12
t
IEC 62858:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIGHTNING DENSITY BASED ON LIGHTNING LOCATION SYSTEMS –
GENERAL PRINCIPLES
FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62858 has been prepared by IEC technical committee 81:
Lightning protection.
This second edition cancels and replaces the first edition published in 2015. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
Two informative annexes are introduced dealing with the determination of lightning density for
risk calculation (Annex A) and ground strike point calculation methods (Annex B).

– 4 – IEC 62858:2019 © IEC 2019
The text of this International Standard is based on the following documents:
FDIS Report on voting
81/627A/FDIS 81/634/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
IEC 62858:2019 © IEC 2019 – 5 –
INTRODUCTION
International standards for lightning protection (e.g. IEC 62305-2) provide methods for the
evaluation of the lightning risk on buildings and structures.
The lightning ground flash density N , defined as the mean number of flashes per square
G
kilometre per year, and the ground strike point density N , defined as the mean number of
SG
ground strike points per square kilometre per year are the primary input parameters to
perform such an evaluation (see Annex A).
In many areas of the world data for risk evaluation are provided by lightning location systems
(LLSs), but no common rule exists defining requirements either for their performance or for
the elaboration of the measured data.

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LIGHTNING DENSITY BASED ON LIGHTNING LOCATION SYSTEMS –
GENERAL PRINCIPLES
1 Scope
This document introduces and discusses all necessary measures to make reliable and
homogeneous the values of ground flash density, N and ground strike point density, N ,
G SG
obtained from lightning location systems (LLSs)
...