SIST EN IEC 61558-2-16:2025
(Main)Safety of transformers, reactors, power 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
Safety of transformers, reactors, power 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
This part of IEC 61558 deals with the safety of switch mode power supply units and transformers for switch mode power supply units.
NOTE 1 Safety includes electrical, thermal and mechanical aspects.
Unless otherwise specified, from here onward, the term SMPS covers switch mode power supply units for general applications.
SMPS covered by this document are air cooled (natural or forced) independent, associated, stationary, portable, single-phase or polyphase with the rated supply voltage not exceeding 1 000 V AC, the rated supply frequency not exceeding 500 Hz, the rated internal operating frequency exceeding 500 Hz, but not exceeding 100 MHz, and the rated output not exceeding 1 kVA or 1 kW, incorporating dry-type transformers with encapsulated or non-encapsulated windings.
NOTE 2 As the maximum rated supply voltage of the internal transformer is 1 000 V AC, the maximum rated supply voltage of the switch mode power supply unit can be lower due to the type of rectification.
NOTE 3 For higher frequencies, additional requirements can be necessary. However, this document can be used for guidance.
This document is applicable to SMPS, converters and inverters without limitation of the rated output subject to an agreement between the purchaser and the manufacturer.
NOTE 4 In the context of this document, converters and inverters are considered to be SMPS.
This document applies to:
a) SMPS incorporating safety isolating transformers providing SELV, PELV, AC or DC output voltage(s) or a combination thereof in accordance with IEC 61140 and IEC 60364-4-41 for use with household and other consumer products,
b) SMPS with a maximum output voltage not exceeding 1 000 V AC or 1 415 V ripple-free DC for use with household and other consumer products, except for products covered in a),
c) This document can be used for transformers for use in SMPS (see Annex BB).
This document does not apply to:
- motor-generator sets;
- uninterruptible power supplies (UPS) in accordance with the IEC 62040 series;
- SMPS covered by IEC 61204-7 (i.e. low-voltage power supply devices DC output, performance characteristics) and DC power and distribution equipment and SMPS for use in applications covered by IEC 61010-1 and IEC 60601-1;
- lamp control gear covered by the IEC 61347 series;
- external circuits and their components intended to be connected to the input terminals and output terminals of the SMPS;
- equipment in accordance with IEC 60065, IEC 60950-1 and IEC 62368-1.
This document can also be used for guidance for products not covered by the scope of this document, the scope of IEC 61204-7 or the scope of the IEC 61347 series.
This document covers the safety requirements for:
[...]
Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechenden Kombinationen - Teil 2-16: Besondere Anforderungen und Prüfungen für Schaltnetzteile und Transformatoren für Schaltnetzteile für allgemeine Anwendungen
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et produits analogues pour des tensions d'alimentation jusqu'à 1 100 V - Partie 2-16: Règles particulières et essais pour les blocs d'alimentation à découpage et les transformateurs pour blocs d'alimentation à découpage
L'IEC 61558-2-16:2021 traite de la sécurité des blocs d'alimentation à découpage et des transformateurs pour blocs d'alimentation à découpage.
Cette deuxième édition annule et remplace la première édition parue en 2009 et l'amendement 1:2013. Cette édition constitue une révision technique.
Elle inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajustement de la structure et des références conformément à l'IEC 61558-1:2017;
- définition de différentes caractéristiques de tension;
- déplacement de la décharge partielle et de la description des constructions dans l'IEC 61558-1:2017;
- spécification d'une méthode alternative pour le dimensionnement des distances d'isolement;
- suppression des exigences relatives aux conditions de champs homogènes.
Il a le statut de publication groupée de sécurité conformément au Guide IEC 104.
Cette Norme internationale doit être utilisée conjointement avec l'IEC 61558-1:2017.
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-16. del: Posebne zahteve in preskusi za stikalne napajalnike in transformatorje za stikalne napajalnike za splošno uporabo
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Nadomešča:
SIST EN 61558-2-16:2010
SIST EN 61558-2-16:2010/A1:2014
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-16.
del: Posebne zahteve in preskusi za stikalne napajalnike in transformatorje za
stikalne napajalnike za splošno uporabo
Safety of transformers, reactors, power 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
Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechenden
Kombinationen - Teil 2-16: Besondere Anforderungen und Prüfungen für Schaltnetzteile
und Transformatoren für Schaltnetzteile für allgemeine Anwendungen
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et produits
analogues pour des tensions d'alimentation jusqu'à 1 100 V - Partie 2-16: Règles
particulières et essais pour les blocs d'alimentation à découpage et les transformateurs
pour blocs d'alimentation à découpage
Ta slovenski standard je istoveten z: EN IEC 61558-2-16:2025
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 61558-2-16
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2025
ICS 29.180 Supersedes EN 61558-2-16:2009
English Version
Safety of transformers, reactors, power 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
(IEC 61558-2-16:2021 + COR1:2023)
Sécurité des transformateurs, bobines d'inductance, blocs Sicherheit von Transformatoren, Drosseln, Netzgeräten und
d'alimentation et combinaisons de ces éléments - Partie 2- entsprechenden Kombinationen - Teil 2-16: Besondere
16: Exigences particulières et essais pour les blocs Anforderungen und Prüfungen für Schaltnetzteile und
d'alimentation à découpage et les transformateurs pour Transformatoren für Schaltnetzteile für allgemeine
blocs d'alimentation à découpage pour applications d'ordre Anwendungen
général (IEC 61558-2-16:2021 + COR1:2023)
(IEC 61558-2-16:2021 + 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 61558-2-16:2025 E
European foreword
The text of document 96/509/FDIS, future edition 2 of IEC 61558-2-16 + 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 61558-2-16:2025.
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 61558-2-16:2009 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 61558-2-16:2021 + 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 60364-4-41:2005 NOTE Approved as HD 60364-4-41:2017 +A11:2017
IEC 60601-1:2005 NOTE Approved as EN 60601-1:2006 (not modified) +A11:2011
IEC 61010-1:2010 NOTE Approved as EN 61010-1:2010 (not modified)
IEC 61204-7:2016 NOTE Approved as EN IEC 61204-7:2018 (not modified)
IEC 61347 series NOTE Approved as EN 61347 series
IEC 61558 series NOTE Approved as EN 61558 series
IEC 62040 series NOTE Approved as EN 62040 series
IEC 62368-1 NOTE Approved as EN IEC 62368-1
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 is applicable, except as follows:
Add:
Publication Year Title EN/HD Year
IEC 60664-4 2005 Insulation coordination for equipment EN 60664-4 2006
within low-voltage systems - Part 4:
Consideration of high-frequency voltage
stress
- - +AC 2006
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 61558-2-1 - Safety of transformers, reactors, power EN IEC 61558-2-1 -
supply units and combinations thereof -
Part 2-1: Particular requirements and tests
for separating transformers and power
supplies incorporating separating
transformers for general applications
IEC 61558-2-4 - Safety of transformers, reactors, power EN IEC 61558-2-4 -
supply units and combinations thereof -
Part 2-4: Particular requirements and tests
for isolating transformers and power supply
units incorporating isolating transformers
for general applications
IEC 61558-2-6 - Safety of transformers, reactors, power EN IEC 61558-2-6 -
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
IEC 61558-2-13 - Safety of transformers, reactors, power EN IEC 61558-2-13 -
supply units and combinations thereof -
Part 2-13: Particular requirements and
tests for auto-transformers and power
supply units incorporating auto-
transformers for general applications
IEC 61558-2-16 ®
Edition 2.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety of transformers, reactors, power 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
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et
combinaisons de ces éléments –
Partie 2-16: Exigences particulières et essais pour les blocs d'alimentation à
découpage et les transformateurs pour blocs d'alimentation à découpage pour
applications d'ordre général
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-9855-8
– 2 – IEC 61558-2-16:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 10
3 Terms and definitions . 10
4 General requirements . 11
5 General notes on tests . 12
6 Ratings . 12
7 Classification . 12
8 Marking and other information . 12
9 Protection against electric shock . 14
10 Change of input voltage setting . 14
11 Output voltage and output current under load . 15
12 No-load output voltage . 15
13 Short-circuit voltage . 16
14 Heating . 16
15 Short-circuit and overload protection . 17
16 Mechanical strength . 17
17 Protection against harmful ingress of dust, solid objects and moisture . 17
18 Insulation resistance, dielectric strength and leakage current . 17
19 Construction . 17
20 Components . 18
21 Internal wiring . 18
22 Supply connection and other external flexible cable or cords . 18
23 Terminals for external conductors . 18
24 Provisions for protective earthing. 18
25 Screws and connections . 18
26 Creepage distances, clearances and distances through insulation . 18
27 Resistance to heat, fire and tracking . 32
28 Resistance to rusting . 32
Annexes . 33
Annex AA (normative) Partial discharge (PD) test . 34
Annex BB (normative) Particular requirements for associated transformers for use in
switch mode power supply units with internal frequencies > 500 Hz . 35
Annex CC (informative) Example for determination of clearances and creepage
distances for associated transformers for use in switch mode power supply units . 38
Bibliography . 40
Figure 101 – Diagram for dimensioning of clearances . 19
Figure 102 – Diagram of dimensioning creepage distances . 24
Figure 103 – Permissible electric field strength for dimensioning of solid insulation in
accordance with Formu
...
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