SIST EN IEC 61558-2-3:2025

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners

IEC 61558-2-3:2023 is available as IEC 61558-2-3:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
This part of IEC 61558 deals with the safety of ignition transformers for gas and oil burners. Ignition transformers incorporating electronic circuits are also covered by this document. This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) adjustment of structure and references in accordance with IEC 61558-1:2017.
It has the status of a group safety publication in accordance with IEC Guide 104. The contents of the corrigendum 1 (2023-09) have been included in this copy.

Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechenden Kombinationen – Teil 2-3: Besondere Anforderungen und Prüfungen für Zündtransformatoren für Gas- und Ölbrenner

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-3: Exigences particulières et essais pour les transformateurs d'allumage pour brûleurs à gaz et combustibles liquides

IEC 61558-2-3:2023 est disponible sous forme de IEC 61558-2-3:2023 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
La présente partie de l'IEC 61558 traite de la sécurité des transformateurs d'allumage pour brûleurs à gaz et combustibles liquides. Les transformateurs d'allumage qui incorporent des circuits électroniques sont également couverts par le présent document. 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) la structure et les références ont été alignées sur l'IEC 61558-1:2017.
Il a le statut de publication groupée de sécurité conformément au Guide 104 de l'IEC. Le contenu du corrigendum 1 (2023-09) a été pris en considération dans cet exemplaire.

Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-3. del: Posebne zahteve in preskusi za vžigne transformatorje in vžigne napajalnike z vžignimi transformatorji za plinske in oljne gorilnike

General Information

• Status: Published
• Publication Date: 03-Apr-2025
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: I96 - Imaginarni 96
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-Mar-2023
• Due Date: 03-Jun-2023
• Completion Date: 04-Apr-2025
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: EN IEC 61558-2-3:2025 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners

Relations

• Replaces: SIST EN 61558-2-3:2010 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3: Particular requirements and tests for ignition transformers for gas and oil burners (IEC 61558-2-3:2010)
• Effective Date: 18-Jan-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2025
Nadomešča:
SIST EN 61558-2-3:2010
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-3.
del: Posebne zahteve in preskusi za vžigne transformatorje in vžigne napajalnike z
vžignimi transformatorji za plinske in oljne gorilnike
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-3:
Particular requirements and tests for ignition transformers for gas and oil burners
Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechenden
Kombinationen – Teil 2-3: Besondere Anforderungen und Prüfungen für
Zündtransformatoren für Gas- und Ölbrenner
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-3: Exigences particulières et essais pour les
transformateurs d'allumage pour brûleurs à gaz et combustibles liquides
Ta slovenski standard je istoveten z: EN IEC 61558-2-3:2025
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61558-2-3

NORME EUROPÉENNE
EUROPÄISCHE NORM March 2025
ICS 29.180 Supersedes EN 61558-2-3:2010
English Version
Safety of transformers, reactors, power supply units and
combinations thereof - Part 2-3: Particular requirements and
tests for ignition transformers for gas and oil burners
(IEC 61558-2-3:2023 + COR1:2023)
Sécurité des transformateurs, bobines d'inductance, blocs Sicherheit von Transformatoren, Drosseln, Netzgeräten und
d'alimentation et des combinaisons de ces éléments - entsprechenden Kombinationen - Teil 2-3: Besondere
Partie 2-3 : Exigences particulières et essais pour les Anforderungen und Prüfungen für Zündtransformatoren für
transformateurs d'allumage pour brûleurs à gaz et Gas- und Ölbrenner
combustibles liquides (IEC 61558-2-3:2023 + COR1:2023)
(IEC 61558-2-3:2023 + COR1:2023)
This European Standard was approved by CENELEC on 2024-10-16. 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61558-2-3:2025 E

European foreword
The text of document 96/577/FDIS, future edition 3 of IEC 61558-2-3 + COR1:2023, prepared by
TC 96 "Transformers, reactors, power supply units, and combinations thereof" was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61558-2-3:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-03-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-03-31
document have to be withdrawn
This document supersedes EN 61558-2-3:2010 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.
This document is read in conjunction with EN IEC 61558-1:2019.
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 61558-2-3:2023 + COR1:2023 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 60204-1:2016 NOTE Approved as EN 60204-1:2018
IEC 61558 series NOTE Approved as EN 61558 series
IEC 61558-2-6 NOTE Approved as EN 61558-2-6
IEC 61558-2-13 NOTE Approved as EN 61558-2-13
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.
Annex ZA of EN IEC 61558-1:2019 is applicable, except as follows:
Add:
Publication Year Title EN/HD Year
IEC 61558-1 2017 Safety of transformers, reactors, power EN IEC 61558-1 2019
supply units and combinations thereof -
Part 1: General requirements and tests
IEC 61558-2-16 - Safety of transformers, reactors, power EN IEC 61558-2-16 -
supply units and combinations thereof -
Part 2-16: Particular requirements and
tests for switch mode power supply units
and transformers for switch mode power
supply units for general applications
ISO 3864-1 2011 Graphical symbols - Safety colours and - -
safety signs - Part 1: Design principles for
safety signs and safety markings

IEC 61558-2-3 ®
Edition 3.0 2023-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

Safety of transformers, reactors, power supply units and combinations thereof –

Part 2-3: Particular requirements and tests for ignition transformers for gas and

oil burners
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des

combinaisons de ces éléments –

Partie 2-3: Exigences particulières et essais pour les transformateurs d'allumage

pour brûleurs à gaz et combustibles liquides

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-7064-6

– 2 – IEC 61558-2-3:2023  IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 7
4 General requirements . 8
5 General notes on tests . 8
6 Ratings . 8
7 Classification . 8
8 Marking and other information . 9
9 Protection against electric shock . 11
10 Change of input voltage setting . 11
11 Output voltage and output current under load . 11
11 Output voltage and output current . 11
12 No-load output voltage . 12
13 Short-circuit voltage . 12
14 Heating . 12
15 Short-circuit and overload protection . 13
16 Mechanical strength . 14
17 Protection against harmful ingress of dust, solid objects and moisture . 14
18 Insulation resistance, dielectric strength and leakage current . 14
19 Construction . 15
20 Components . 16
21 Internal wiring . 16
22 Supply connection and other external flexible cable or cords . 16
23 Terminals for external conductors . 16
24 Provisions for protective earthing. 16
25 Screws and connections . 16
26 Creepage distances, clearances and distances through insulation . 16
27 Resistance to heat, fire and tracking . 17
28 Resistance to rusting . 17
Annexes . 19
Bibliography . 20

Figure 101 – Arcing horn . 18

Table 101 – Symbols indicating the kind of transformer . 11
Table 102 – Preferred values of operational parameters . 12
Table 103 – Test time for short-circuit test . 14
Table 104 – Creepage distances and clearances for output terminals . 17

IEC 61558-2-3:2023  IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –

Part 2-3: Particular requirements and tests for ignition
transformers for gas and oil burners

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
...