EN IEC 61558-2-10:2024

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V

IEC 61558-2-10:2024 is available as IEC 61558-2-10:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61558-2-10:2024 deals with the safety of separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V. Transformers incorporating electronic circuits are also covered by this document. This second edition cancels and replaces the first edition published in 2014. 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; b) overvoltage categories I, II, III and IV for clearances and dielectric strength tests are included; c) clearances for homogenous field conditions deleted. It has the status of a group safety publication in accordance with IEC Guide 104.

Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechenden Kombinationen - Teil 2-10: Besondere Anforderungen und Prüfungen für Netztransformatoren mit hohem Isolationspegel und Netztransformatoren mit Ausgangsspannungen über 1 000 V

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-10 : Exigences particulières et essais pour les transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et pour les transformateurs d'isolement à enroulements séparés à tensions secondaires supérieures à 1 000 V

L'IEC 61558-2-10:2024 est disponible sous forme de IEC 61558-2-10:2024 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente. L'IEC 61558-2-10:2024 traite de la sécurité des transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et des transformateurs d'isolement à enroulements séparés à tensions secondaires supérieures à 1 000 V. Les transformateurs qui incorporent des circuits électroniques sont également couverts par le présent document. Cette seconde édition annule et remplace la première édition parue en 2014. 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; b) les catégories de surtension I, II, III et IV pour les essais de rigidité diélectrique et les distances d'isolement ont été ajoutées; c) les distances d'isolement relatives aux conditions de champs homogènes ont été supprimées. Il a le statut de publication groupée de sécurité conformément au Guide 104 de l'IEC.

Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-10. del: Posebne zahteve in preskusi za ločilne transformatorje z visoko izolacijsko stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V

General Information

• Status: Published
• Publication Date: 25-Jul-2024
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/SR 96 - Small power transformers, reactors, power supply units and similar products
• Drafting Committee: IEC/TC 96 - IEC_TC_96
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 26-Jul-2024
• Due Date: 28-Feb-2023
• Completion Date: 26-Jul-2024
• Ref Project: SIST EN IEC 61558-2-10:2024 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V

Relations

• Replaces: EN 61558-2-10:2014 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-10. del:
Posebne zahteve in preskusi za ločilne transformatorje z visoko izolacijsko
stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-
10: Particular requirements and tests for separating transformers with high insulation
level and separating transformers with output voltages exceeding 1 000 V
Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-10:
Besondere Anforderungen und Prüfungen an Netztransformatoren mit hohem
Isolationspegel und Netztransformatoren mit Ausgangsspannungen über 1 000 V
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-10: Règles particulières et essais pour les
transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et pour
les transformateurs d'isolement à enroulements séparés à tensions secondaires
supérieures à 1 000 V
Ta slovenski standard je istoveten z: EN IEC 61558-2-10:2024
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 61558-2-10

NORME EUROPÉENNE
EUROPÄISCHE NORM July 2024
ICS 29.180 Supersedes EN 61558-2-10:2014
English Version
Safety of transformers, reactors, power supply units and
combinations thereof - Part 2-10: Particular requirements and
tests for separating transformers with high insulation level and
separating transformers with output voltages exceeding 1 000 V
(IEC 61558-2-10:2024)
Sécurité des transformateurs, bobines d'inductance, blocs Sicherheit von Transformatoren, Drosseln, Netzgeräten und
d'alimentation et des combinaisons de ces éléments - entsprechenden Kombinationen - Teil 2-10: Besondere
Partie 2-10 : Exigences particulières et essais pour les Anforderungen und Prüfungen für Netztransformatoren mit
transformateurs d'isolement à enroulements séparés à hohem Isolationspegel und Netztransformatoren mit
niveau d'isolement élevé et pour les transformateurs Ausgangsspannungen über 1 000 V
d'isolement à enroulements séparés à tensions secondaires (IEC 61558-2-10:2024)
supérieures à 1 000 V
(IEC 61558-2-10:2024)
This European Standard was approved by CENELEC on 2024-07-12. 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 61558-2-10:2024 E

European foreword
The text of document 96/589/FDIS, future edition 2 of IEC 61558-2-10, prepared by IEC/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 61558-2-10:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-04-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-07-12
document have to be withdrawn
This document supersedes EN 61558-2-10:2014 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 61558-2-10:2024 was approved by CENELEC as a
European Standard without any modification.
The endorsement notice of EN IEC 61558-1:2019 applies, except as follows.
Addition:
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60076-11:2018 NOTE Approved as EN IEC 60076-11:2018 (not modified)
IEC 60204-1:2016 NOTE Approved as EN 60204-1:2018
IEC 61050:1991 NOTE Approved as EN 61050:1992
IEC 61050:1991/A1:1994 NOTE Approved as EN 61050:1992/A1:1995
IEC 61347-2-10:2000 NOTE Approved as EN 61347-2-10:2001 (not modified)
IEC 61347-2-
NOTE Approved as EN 61347-2-10:2001/A1:2009 (not modified)
10:2000/A1:2008
IEC 61558 series NOTE Approved as EN 61558 series
IEC 61558-2-16:2021 NOTE Approved as EN IEC 61558-2-16:— (not modified)
IEC 62477-1:2022 NOTE Approved as EN IEC 62477-1:2023 (not modified)

to be published, Stage at the time of publication: FprEN IEC 61558-2-16:2021.
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.
Annex ZA of EN IEC 61558-1:2019 applies, except as follows.
Addition:
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 61558-2-10 ®
Edition 2.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP ENERGY EFFICIENCY PUBLICATION

PUBLICATION GROUPÉE SUR L'EFFICACITÉ ÉNERGÉTIQUE

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

Part 2-10: Particular requirements and tests for separating transformers with

high insulation level and separating transformers with output voltages

exceeding 1 000 V
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des

combinaisons de ces éléments –

Partie 2-10 : Exigences particulières et essais pour les transformateurs

d'isolement à enroulements séparés à niveau d'isolement élevé et pour les

transformateurs d'isolement à enroulements séparés à tensions secondaires

supérieures à 1 000 V
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180  ISBN 978-2-8322-8863-4

– 2 – IEC 61558-2-10:2024  IEC 2024
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 . 9
8 Marking and other information . 9
9 Protection against electric shock . 10
10 Change of input voltage setting . 11
11 Output voltage and output current under load . 11
12 No-load output voltage . 11
13 Short-circuit voltage . 12
14 Heating . 12
15 Short-circuit and overload protection . 12
16 Mechanical strength . 12
17 Protection against harmful ingress of dust, solid objects and moisture . 12
18 Insulation resistance, dielectric strength and leakage current . 12
19 Construction . 13
20 Components . 14
21 Internal wiring . 14
22 Supply connection and other external flexible cables or cords . 14
23 Terminals for external conductors . 14
24 Provisions for protective earthing. 14
25 Screws and connections . 15
26 Creepage distances, clearances and distances through insulation . 15
27 Resistance to heat, fire and tracking . 16
28 Resistance to rusting . 16
Annexes . 17
Bibliography . 18

Table 101 – Symbols indicating the kind of transformer . 10
Table 102 – Output voltage difference . 12
Table 103 – Table of dielectric strength test voltages for working voltages above
1 000 V . 13
Table 104 – Minimum clearances in air up to 2 000 m above sea level. 15
Table 105 – Minimum creepage distances for basic or supplementary insulation. 16

IEC 61558-2-10:2024  IEC 2024 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –

Part 2-10: Particular requirements and tests for separating
transformers with high insulation level and separating
transformers with output voltages exceeding 1 000 V

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
...