SIST EN IEC 61400-24:2019/A1:2025

SLOVENSKI STANDARD
01-marec-2025
Sistemi za proizvodnjo energije na veter - 24. del: Zaščita pred delovanjem strele -
Dopolnilo A1 (IEC 61400-24:2019/AMD1:2024)
Wind energy generation systems - Part 24: Lightning protection (IEC 61400-
24:2019/AMD1:2024)
Windenergieanlagen - Teil 24: Blitzschutz (IEC 61400-24:2019/AMD1:2024)
Systèmes de génération d’énergie éolienne - Partie 24: Protection contre la foudre (IEC
61400-24:2019/AMD1:2024)
Ta slovenski standard je istoveten z: EN IEC 61400-24:2019/A1:2024
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
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 61400-24:2019/A1

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2024
ICS 27.180
English Version
Wind energy generation systems - Part 24: Lightning protection
(IEC 61400-24:2019/AMD1:2024)
Systèmes de génération d'énergie éolienne - Partie 24: Windenergieanlagen - Teil 24: Blitzschutz
Protection contre la foudre (IEC 61400-24:2019/AMD1:2024)
(IEC 61400-24:2019/AMD1:2024)
This amendment A1 modifies the European Standard EN IEC 61400-24:2019; it was approved by CENELEC on 2024-12-18. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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 61400-24:2019/A1:2024 E

European foreword
The text of document 88/1040/FDIS, future edition 2 of IEC 61400-24/AMD1, prepared by TC 88
"Wind energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61400-24:2019/A1:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-12-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-12-31
document have to be withdrawn
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 61400-24:2019/AMD1:2024 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.cencenelec.eu.
Add the following reference:
Publication Year Title EN/HD Year
IECRE OD-501 - Type and Component Certification Scheme - -
(wind turbines)
IEC 61400-24 ®
Edition 2.0 2024-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Wind energy generation systems –

Part 24: Lightning protection
Systèmes de génération d'énergie éolienne –

Partie 24: Protection contre la foudre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.180  ISBN 978-2-8322-9911-1

– 2 – IEC 61400-24:2019/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WIND ENERGY GENERATION SYSTEMS –

Part 24: Lightning protection
AMENDMENT 1
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 61400-24:2019 has been prepared by IEC technical committee 88: Wind
energy generation systems.
The text of this Amendment is based on the following documents:
Draft Report on voting
88/1040/FDIS 88/1054/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.

IEC 61400-24:2019/AMD1:2024 – 3 –
© IEC 2024
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts in the IEC 61400 series, published under the general title Wind energy
generation systems, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
___________
INTRODUCTION to Amendment 1
This amendment to IEC 61400-24:2019 addresses an update of the content in Annex L
regarding monitoring systems for detecting lightning strikes on wind turbines.

___________
2 Normative references
Add the following document to the existing list, after IEC 62305-4:2010:
IECRE OD-501, Type and Component Certification Scheme (wind turbines)

– 4 – IEC 61400-24:2019/AMD1:2024
© IEC 2024
Replace the existing Annex L with the following new Annex L:
Annex L
(informative)
Lightning detection and measurement systems
L.1 General
L.1.1 Purpose
It is recommended that wind turbines are equipped with systems capable of detecting lightning,
measuring its current components, and processing the parameters of the lightning strikes. The
purpose of such systems is to:
• provide information to the operator on the occurrence of lightning strikes to the wind turbine
and to give input to operation and maintenance regimes;
• provide valuable data on lightning strikes to wind turbines thus allowing post-assessment of
the lightning magnitude/characteristics and contribution to the operator's risk assessment
processes;
• enable the operator to compare the measured current parameters of lightning strikes to the
lightning protection level, LPL, used for designing the wind turbine lightning protection
system (e.g. for assessing if the lightning current intercepted by the LPS is below or above
the values defined in Table 1);
• avoid hazardous activities such as maintenance when there is a risk of lightning strike.
L.1.2 Nomenclature
The following nomenclature applies to this annex.
a) Thunderstorm warning systems (TWS), composed of thunderstorm detector(s) able to
monitor the lightning or upcoming lightning activity and tools for processing the acquired
data to provide a valid alarm (warning). They are based on local sensors (either based on
electrostatic or electromagnetic fields), a group of local sensors or lightning location
systems (LLS).
b) Lightning measurement systems (LMS) measuring lightning events and their features with
devices installed on the turbine. These systems range from a combination of simple
electromechanical event counters to complex systems measuring and analyzing lightning
parameters.
L.2 Benefits of lightning detection and measurement systems
There are many benefits of measuring actual lightning exposure. Depending on the specific
stakeholder, a non-exhaustive list is included in Table L.1, Table L.2 and Table L.3. The
industry is encouraged to share lightning data across all stakeholders (OEM/Owner/Insurance),
to ensure benefits across the entire value chain.

IEC 61400-24:2019/AMD1:2024 – 5 –
© IEC 2024
Table L.1 – Considerations and benefits for the OEM (original equipment manufacturer)
Statement Value aspect
For turbines delivered with long service contracts, the OEM (Original This enables condition-based
Equipment Manufacturer) with a service contract would like to know when maintenance or repair, lowering
the receptor/LPS has reached the design lifetime and needs to be downtime and unexpected damage
replaced. This can be achieved by monitoring the accumulated charge costs significantly. Maintenance is
and specific energy for each blade and correlating with
...