SIST EN IEC 61558-2-14:2025
(Main)Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers for general applications
This part of IEC 61558 deals with the safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications.
Variable transformers incorporating electronic circuits are also covered by this document.
NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects.
Unless otherwise specified, from here onward, the term transformer covers variable transformers for general applications and power supply units incorporating variable transformers for general applications.
For power supply units (linear) this document is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable together with this document. Where two requirements are in conflict, the most severe take precedence.
This document does not apply to transformers covered by IEC 60076-11.
This document is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated variable dry-type transformers.
- variable auto-transformers;
- variable separating transformers;
- variable isolating transformers;
- variable safety isolating transformers.
The windings can be encapsulated or non-encapsulated.
The rated supply voltage does not exceed 1 000 V AC and the rated supply frequency and the internal operational frequencies do not exceed 500 Hz.
The rated output does not exceed:
- 40 kVA for single-phase variable auto-transformers;
- 200 kVA for poly-phase variable auto-transformers;
- 1 kVA for single-phase variable separating transformers;
- 5 kVA for poly-phase variable separating transformers;
- 25 kVA for single-phase variable isolating transformers;
- 40 kVA for poly-phase variable isolating transformers;
- 10 kVA for single-phase variable safety isolating transformers;
- 16 kVA for poly-phase variable safety isolating transformers.
This document is applicable to variable transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer.
NOTE 2 Transformers intended to supply distribution networks are not included in the scope.
[...]
Sicherheit von Transformatoren, Drosseln, Netzgeräten und deren Kombinationen - Teil 2-14: Besondere Anforderungen und Prüfungen für Stelltransformatoren und Netzgeräte, die Stelltransformatoren enthalten
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-14: Exigences particulières et essais pour les transformateurs variables et les blocs d'alimentation incorporant des transformateurs variables
IEC 61558-2-14:2022 est disponible sous forme de IEC 61558-2-14:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
- ajustement de la structure et des références conformément à l'IEC 61558-1:2017;
- description des constructions déplacées vers l'IEC 61558-1:2017;
- nouveaux symboles pour les blocs d'alimentation avec des tensions secondaires régulées linéairement et modifications de position du collecteur de courant exigées.
Il a le statut de publication groupée de sécurité conformément au Guide IEC 104.
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-14. del: Posebne zahteve in preskusi za spremenljive transformatorje in napajalnike z vgrajenimi spremenljivimi transformatorji
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Nadomešča:
SIST EN 61558-2-14:2013
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-14.
del: Posebne zahteve in preskusi za spremenljive transformatorje in napajalnike z
vgrajenimi spremenljivimi transformatorji
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-
14: Particular requirements and tests for variable transformers and power supply units
incorporating variable transformers for general applications
Sicherheit von Transformatoren, Drosseln, Netzgeräten und deren Kombinationen - Teil
2-14: Besondere Anforderungen und Prüfungen für Stelltransformatoren und Netzgeräte,
die Stelltransformatoren enthalten
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-14: Exigences particulières et essais pour les
transformateurs variables et les blocs d'alimentation incorporant des transformateurs
variables
Ta slovenski standard je istoveten z: EN IEC 61558-2-14:2025
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPÄISCHE NORM EN IEC 61558-2-14
EUROPEAN STANDARD
NORME EUROPÉENNE
März 2025
ICS 29.180 Ersetzt EN 61558-2-14:2013
Deutsche Fassung
Sicherheit von Transformatoren, Drosseln, Netzgeräten und
deren Kombinationen - Teil 2-14: Besondere Anforderungen und
Prüfungen für Stelltransformatoren und Netzgeräte, die
Stelltransformatoren enthalten
(IEC 61558-2-14:2022)
Safety of transformers, reactors, power supply units and Sécurité des transformateurs, bobines d'inductance, blocs
combinations thereof - Part 2-14: Particular requirements d'alimentation et des combinaisons de ces éléments -
and tests for variable transformers and power supply units Partie 2-14: Exigences particulières et essais pour les
incorporating variable transformers for general applications transformateurs variables et les blocs d'alimentation
(IEC 61558-2-14:2022) incorporant des transformateurs variables pour applications
générales
(IEC 61558-2-14:2022)
Diese Europäische Norm wurde von CENELEC am 2024-10-16 angenommen. CENELEC-Mitglieder sind gehalten, die CEN/CENELEC-
Geschäftsordnung zu erfüllen, in der die Bedingungen festgelegt sind, unter denen dieser Europäischen Norm ohne jede Änderung der
Status einer nationalen Norm zu geben ist.
Auf dem letzten Stand befindliche Listen dieser nationalen Normen mit ihren bibliographischen Angaben sind beim CEN-CENELEC
Management Centre oder bei jedem CENELEC-Mitglied auf Anfrage erhältlich.
Diese Europäische Norm besteht in drei offiziellen Fassungen (Deutsch, Englisch, Französisch). Eine Fassung in einer anderen Sprache,
die von einem CENELEC-Mitglied in eigener Verantwortung durch Übersetzung in seine Landessprache gemacht und dem CEN-CENELEC
Management Centre mitgeteilt worden ist, hat den gleichen Status wie die offiziellen Fassungen.
CENELEC-Mitglieder sind die nationalen elektrotechnischen Komitees von Belgien, Bulgarien, Dänemark, Deutschland, Estland, Finnland,
Frankreich, Griechenland, Irland, Island, Italien, Kroatien, Lettland, Litauen, Luxemburg, Malta, den Niederlanden, Norwegen, Österreich,
Polen, Portugal, der Republik Nordmazedonien, Rumänien, Schweden, der Schweiz, Serbien, der Slowakei, Slowenien, Spanien, der
Tschechischen Republik, der Türkei, Ungarn, dem Vereinigten Königreich und Zypern.
Europäisches Komitee für Elektrotechnische Normung
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC Alle Rechte der Verwertung, gleich in welcher Form und in welchem Verfahren, sind weltweit den Mitgliedern von
CENELEC vorbehalten.
Ref. Nr. EN IEC 61558-2-14:2025 D
European foreword
The text of document 96/507/CDV, future edition 2 of IEC 61558-2-14, 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 61558-2-14:2025.
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 61558-2-14:2013 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 61558-2-14:2022 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 60076-11:2018 NOTE Approved as EN IEC 60076-11:2018 (not modified)
IEC 61558 series NOTE Approved as EN 61558 series
IEC 60204-1:2016 NOTE Approved as EN 60204-1:2018
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 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 61558-2-14 ®
Edition 2.0 2022-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety of transformers, reactors, power supply units and combinations thereof –
Part 2-14: Particular requirements and tests for variable transformers and power
supply units incorporating variable transformers for general applications
Sécurité des transformateurs, bobines d’inductance, blocs d'alimentation et des
combinaisons de ces éléments –
Partie 2-14: Exigences particulières et essais pour les transformateurs variables
et les blocs d'alimentation incorporant des transformateurs variables pour
applications générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-5039-6
– 2 – IEC 61558-2-14:2022 IEC 2022
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 8
3 Terms and definitions . 8
4 General requirements . 9
5 General notes on tests . 9
6 Ratings . 9
7 Classification . 10
8 Marking and other information . 10
9 Protection against electric shock . 12
10 Change of input voltage setting . 12
11 Output voltage and output current under load . 12
12 No-load output voltage . 12
13 Short-circuit voltage . 14
14 Heating . 15
15 Short-circuit and overload protection . 15
16 Mechanical strength . 15
17 Protection against harmful ingress of dust, solid objects and moisture . 16
18 Insulation resistance, dielectric strength and leakage current . 16
19 Construction . 16
20 Components . 16
21 Internal wiring . 16
22 Supply connection and other external flexible cables or cords . 16
23 Terminals for external conductors . 17
24 Provisions for protective earthing. 17
25 Screws and connections . 17
26 Creepage distances, clearances and distances through insulation . 17
27 Resistance to heat, fire and tracking . 17
28 Resistance to rusting . 17
Annexes . 18
Bibliography . 19
Table 101 – Symbols indicating the kind of transformer . 11
Table 102 – Output voltage ratio for auto-transformers, separating transformers and
safety isolating transformers . 14
Table 103 – Output voltage ratio for isolating transformers . 14
Table 104 – Maximum permitted temperatures of the winding . 15
IEC 61558-2-14:2022 IEC 2022 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS, POWER
SUPPLY UNITS AND COMBINATIONS THEREOF –
Part 2-14: Particular requirements and tests for variable
transformers and power supply units incorporating
variable transformers for general applications
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 accur
...
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