EN IEC 61820-3-4:2023

SLOVENSKI STANDARD
01-september-2023
Električne inštalacije za razsvetljavo in radijske javljalnike na letališčih - 3-4. del:
Sekundarni varnostni tokokrogi v seriji vezij - Splošne varnostne zahteve (IEC
61820-3-4:2023)
Electrical installations for lighting and beaconing of aerodromes - Part 3-4: Safety
secondary circuits in series circuits - General safety requirements (IEC 61820-3-4:2023)
Elektrische Anlagen für Beleuchtung und Befeuerung von Flugplätzen -
Sicherheitssekundärkreise in Serienschaltung – Allgemeine Sicherheitsanforderungen
(IEC 61820-3-4:2023)
Installations électriques pour l'éclairage et le balisage des aérodromes - Circuits
secondaires de sécurité dans des circuits série - Exigences générales de sécurité (IEC
61820-3-4:2023)
Ta slovenski standard je istoveten z: EN IEC 61820-3-4:2023
ICS:
29.140.50 Instalacijski sistemi za Lighting installation systems
razsvetljavo
49.100 Oprema za servis in Ground service and
vzdrževanje na tleh maintenance equipment
93.120 Gradnja letališč Construction of airports
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61820-3-4

NORME EUROPÉENNE
EUROPÄISCHE NORM June 2023
ICS 29.140.50; 93.120
English Version
Electrical installations for lighting and beaconing of aerodromes -
Part 3-4: Safety secondary circuits in series circuits - General
safety requirements
(IEC 61820-3-4:2023)
Installations électriques pour l'éclairage et le balisage des Elektrische Anlagen für Beleuchtung und Befeuerung von
aérodromes - Partie 3-4: Circuits secondaires de sécurité Flugplätzen - Teil 3-4: Sicherheitssekundärkreise in
dans les circuits série - Exigences générales de sécurité Serienschaltung - Allgemeine Sicherheitsanforderungen
(IEC 61820-3-4:2023) (IEC 61820-3-4:2023)
This European Standard was approved by CENELEC on 2023-06-15. 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61820-3-4:2023 E

European foreword
The text of document 97/253/FDIS, future edition 1 of IEC 61820-3-4, prepared by IEC/TC 97
"Electrical installations for lighting and beaconing of aerodromes" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 61820-3-4:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-03-15
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-06-15
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 61820-3-4:2023 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 60364-1:2005 NOTE Approved as HD 60364-1:2008 +A11:2017
IEC 61558-1:2017 NOTE Approved as EN IEC 61558-1:2019 (not modified)
IEC 61558-2-4:2021 NOTE Approved as EN IEC 61558-2-4:2021 (not modified)
IEC 61820-1 NOTE Approved as EN IEC 61820-1

Under preparation. Stage at the time of publication: FprEN IEC 61558-2-4:2021.
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 60364-4-41 2005 Low-voltage electrical installations - Part 4- HD 60364-4-41 2017
41: Protection for safety - Protection
against electric shock
- -  + A11 2017
- -  + A12 2019
IEC 60417 - Graphical symbols for use on equipment - -
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- -  + corrigendum May 1993
+ A1 1999  + A1 2000
+ A2 2013  + A2 2013
IEC 61000-6-2 2016 Electromagnetic compatibility (EMC) - Part EN IEC 61000-6-2 2019
6-2: Generic standards - Immunity
standard for industrial environments
IEC 61000-6-4 2018 Electromagnetic compatibility (EMC) - Part EN IEC 61000-6-4 2019
6-4: Generic standards - Emission
standard for industrial environments
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61558-2-6 2021 Safety of transformers, reactors, power EN IEC 61558-2-6 2021
supply units and combinations thereof -
Part 2-6: Particular requirements and tests
for safety isolating transformers and power
supply units incorporating safety isolating
transformers for general applications

Under preparation. Stage at the time of publication: FprEN IEC 61558-2-6:2021.
IEC 61820-1 2019 Electrical installations for aeronautical EN IEC 61820-1 2019
ground lighting at aerodromes - Part 1:
Fundamental principles
IEC 61821 2011 Electrical installations for lighting and EN 61821 2011
beaconing of aerodromes - Maintenance of
aeronautical ground lighting constant
current series circuits
IEC 61822 2009 Electrical installations for lighting and EN 61822 2009
beaconing of aerodromes - Constant
current regulators
IEC 61823 2002 Electrical installations for lighting and EN 61823 2003
beaconing of aerodromes - AGL series
transformers
IEC 63067 2020 Electrical installations for lighting and EN IEC 63067 2020
beaconing of aerodromes - Connecting
devices - General requirements and tests
CISPR 11 2015 Industrial, scientific and medical equipment EN 55011 2016
- Radio-frequency disturbance
characteristics - Limits and methods of
measurement
+ A1 2016  + A1 2017
- -  + A11 2020
+ A2 2019  + A2 2021
CISPR 32 2015 Electromagnetic compatibility of multimedia EN 55032 2015
equipment - Emission requirements
- -  + A11 2020
IEC 61820-3-4 ®
Edition 1.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical installations for lighting and beaconing of aerodromes –

Part 3-4: Safety secondary circuits in series circuits – General safety

requirements
Installations électriques pour l'éclairage et le balisage des aérodromes –

Partie 3-4: Circuits secondaires de sécurité dans les circuits série – Exigences

générales de sécurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50; 93.120 ISBN 978-2-8322-7017-2

– 2 – IEC 61820-3-4:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 12
4 Requirements for the SELV/PELV supply . 12
4.1 General . 12
4.2 SELV/PELV-safety demarcation line in an AGL series circuit . 12
4.3 Environmental conditions . 14
4.4 Degree of protection provided by enclosures . 14
4.5 Electromagnetic compatibility (EMC) . 14
4.5.1 Limits of electromagnetic emission . 14
4.5.2 Limits of immunity . 14
4.6 Marking . 14
4.6.1 Marking of the SELV/PELV power supply (single unit: safety transformer
combined with a limiter) . 14
4.6.2 Marking of the SELV/PELV power supply (multiple units: safety
transformer in series with a separate limiter) . 15
4.6.3 Marking at the installation locations . 15
4.7 Protection against electric shock . 15
4.7.1 Basic requirements . 15
4.7.2 Protective measure to be applied . 15
4.7.3 Voltage limit for the SELV/PELV circuit . 15
4.7.4 Protective separation from the primary series circuit . 17
4.7.5 Assemblies in the SELV/PELV supply . 18
4.8 Interfaces . 18
4.8.1 Supply unit . 18
4.8.2 Connectors . 18
5 Useful methodic for a SELV/PELV series circuit configuration . 18
5.1 General . 18
5.2 Method: systemic approach . 19
5.3 Method: extended systemic approach (with limiter) . 19
5.4 Verification of the chosen method . 19
6 Testing . 19
6.1 General . 19
6.2 System design test. 20
6.2.1 General . 20
6.2.2 Test for the "systemic approach" method . 20
6.2.3 Test for "extended systemic approach" method (device type test) . 21
6.3 Production routine tests . 23
6.3.1 Transformer test . 23
6.3.2 Limiter test .
...