EN 61558-2-14:2013

Safety of transformers, reactors, power supply units and combination thereof - Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers

IEC 61558-2-14:2012 deals with safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. This first edition cancels and replaces the chapter IV of the IEC 60989 published in 1991. It is a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) update of the existing text; b) complete editorial review. This part has the status of a group safety publication in accordance with IEC Guide 104:2010. The preparation of safety publications and the use of basic safety publications and group safety publications. The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in accordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication.

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

La CEI 61558-2-14:2012 traite de la sécurité des transformateurs variables pour applications générales et des blocs d'alimentation incorporant des transformateurs variables pour applications générales. Les transformateurs incorporant des circuits électroniques sont également couverts par la présente norme. Cette première édition annule et remplace le chapitre IV de la CEI 60989 parue en 1991. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) mise à jour du texte existant; b) revue éditoriale complète. La présente partie a le statut de publication groupée de sécurité conformément au guide CEI 104:2010. The preparation of safety publications and the use of basic safety publications and group safety publications (disponible en anglais seulement). L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois après la date de publication.

Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-14. del: Posebne zahteve in preskus za spremenljive transformatorje in napajalnike z vgrajenimi spremenljivimi transformatorji

Ta del standarda IEC 61558 obravnava varnost spremenljivih transformatorjev za splošno uporabo in napajalnikov z vgrajenimi spremenljivimi transformatorji za splošno uporabo. V tem standardu so obravnavani transformatorji z vgrajenimi elektronskimi vezji. OPOMBA 1: Varnost vključuje električne, toplotne, mehanske in kemijske vidike. Če ni navedeno drugače, od tu dalje velja, da izraz transformator zajema spremenljive transformatorje za splošno uporabo in napajalnike z vgrajenimi spremenljivimi transformatorji za splošno uporabo. Nazivna napajalna napetost ne presega 1000 V izmeničnega napajanja, nazivna napajalna frekvenca pa ne presega 500 Hz. Ta standard velja za transformatorje in napajalnike (linearne) z notranjimi operativnimi frekvencami do 500 Hz. Ta standard, uporabljen skupaj z 2. do 16. delom za stikalne napajalnike (SMPS), prav tako velja za napajalnike z notranjimi operativnimi frekvencami, ki presegajo 500 Hz. Če sta zahtevi v nasprotju ena z drugo, prevlada natančnejša. Ta del ne velja za transformatorje, obravnavane v standardu IEC 60076-11. Ta del velja za stacionarne ali prenosne, eno- ali večfazne, zračno hlajene (naravno ali umetno) neodvisne ali povezane suhe transformatorje.
– spremenljivi avtotransformatorji in napajalniki z vgrajenimi spremenljivimi avtotransformatorji;
– spremenljivi ločilni transformatorji in napajalniki z vgrajenimi spremenljivimi ločilnimi transformatorji;
– spremenljivi izolirni transformatorji in napajalniki z vgrajenimi spremenljivimi izolirnimi transformatorji;
– spremenljivi varnostni izolirni transformatorji in napajalniki z vgrajenimi spremenljivimi varnostnimi izolirnimi transformatorji. Navitja so lahko enkapsulirana ali neenkapsulirana. Nazivna izhodna moč ne preseže:
– 40 kVA pri enofaznih spremenljivih avtotransformatorjih in napajalnikih
z enofaznimi spremenljivimi avtotransformatorji;
– 200 kVA pri večfaznih spremenljivih avtotransformatorjih in napajalnikih
z večfaznimi spremenljivimi avtotransformatorji;
– 1 kVA pri enofaznih spremenljivih ločilnih transformatorjih in napajalnikih z vgrajenimi enofaznimi spremenljivimi ločilnimi transformatorji;
– 5 kVA pri večfaznih spremenljivih ločilnih transformatorjih in napajalnikih z vgrajenimi večfaznimi spremenljivimi ločilnimi transformatorji;
– 25 kVA pri enofaznih spremenljivih izolirnih transformatorjih in napajalnikih z vgrajenimi enofaznimi spremenljivimi izolirnimi transformatorji;
– 40 kVA pri večfaznih spremenljivih izolirnih transformatorjih in napajalnikih z vgrajenimi večfaznimi spremenljivimi izolirnimi transformatorji;
– 10 kVA pri enofaznih spremenljivih varnostnih izolirnih transformatorjih in napajalnikih z vgrajenimi enofaznimi spremenljivimi varnostnimi izolirnimi transformatorji;
– 16 kVA pri večfaznih spremenljivih varnostnih izolirnih transformatorjih in napajalnikih z vgrajenimi večfaznimi spremenljivimi varnostnimi izolirnimi transformatorji. Ta del velja za transformatorje brez omejitev nazivne izhodne moči, o čemer se dogovorita kupec in proizvajalec. OPOMBA 2: V to področje uporabe niso vključeni transformatorji, namenjeni napajanju razdelilnih omrežij. Za spremenljive avtotransformatorje in napajalnike z vgrajenimi spremenljivimi avtotransformatorji velja naslednje:
– izhodna napetost brez obremenitve ali nazivna izhodna napetost ne preseže 1000 V izmeničnega toka oziroma 1415 V enosmernega toka brez valovitosti;
– nazivna izhodna napetost pri neodvisnih avtotransformatorjih ne preseže 50 V izmeničnega toka ali 120 V enosmernega toka brez valovitosti, ne preseže pa 250 V izmeničnega toka.

General Information

• Status: Published
• Publication Date: 28-Feb-2013
• Withdrawal Date: 26-Dec-2015
• 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: 01-Mar-2013
• Completion Date: 01-Mar-2013
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• 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
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: SIST EN 61558-2-14:2013 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-14: Particular requirements and test for variable transformers and power supply units incorporating variable transformers

Relations

• Revised: prEN IEC 61558-2-14:2021 - 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
• Effective Date: 30-Mar-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2013
Varnost transformatorjev, dušilk, napajalnikov in kombinacij teh elementov - 2-14.
del: Posebne zahteve in preskus 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 test for variable transformers and power supply units
incorporating variable transformers
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 61558-2-14:2013
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61558-2-14
NORME EUROPÉENNE
March 2013
EUROPÄISCHE NORM
ICS 29.180
English version
Safety of transformers, reactors, power supply units
and combination thereof -
Part 2-14: Particular requirements and tests for variable transformers
and power supply units incorporating variable transformers
(IEC 61558-2-14:2012)
Sécurité des transformateurs, bobines Sicherheit von Transformatoren, Drosseln,
d’inductance, blocs d’alimentation Netzgeräten und deren Kombinationen -
et des combinaisons de ces éléments - Teil 2-14: Besondere Anforderungen und
Partie 2-14 : Exigences particulières et Prüfungen für Stelltransformatoren
essais pour les transformateurs variables und Netzgeräte, die Stelltransformatoren
et les blocs d’alimentation incorporant des enthalten
transformateurs variables (IEC 61558-2-14:2012)
(CEI 61558-2-14:2012)
This European Standard was approved by CENELEC on 2012-12-27. 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, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61558-2-14:2013 E
Foreword
The text of document 96/395/FDIS, future edition 1 of IEC 61558-2-14, prepared by IEC/TC 96
"Transformers, reactors, power supply units and combination thereof" was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN 61558-2-14:2013.
The following dates are fixed:
(dop) 2013-09-27
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2015-12-27
standards conflicting with the
document have to be withdrawn
This standard is to be used in conjunction with EN 61558-1:2005 + A1:2009.

This part supplements or modifies the corresponding clauses in EN 61558-1, so as to convert that
publication into the EN standard: Particular requirements and tests for variable transformers and
power supply units incorporating variable transformers.

A list of all parts of the EN 61558 series, under the general title: Safety of transformers, reactors,
power supply units and combination thereof, can be found on the CENELEC website.

Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.

Where a particular subclause of Part 1 is not mentioned in this part, that subclause applies as far as is
reasonable. Where this part states "addition", "modification" or "replacement", the relevant text of
Part 1 is to be adapted accordingly.

In this part, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– explanatory matter: in smaller roman type.

In the text of this part, the words in bold are defined in Clause 3.

Subclauses, notes, figures and tables additional to those in Part 1 are numbered starting from 101;
supplementary annexes are entitled AA, BB, etc.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment
Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).
Endorsement notice
The text of the International Standard IEC 61558-2-14:2012 was approved by CENELEC as a
European Standard without any modification.
In the Bibliography of EN 61558-1:2005, the following notes have to be added for the standards
indicated:
IEC 60076-11 NOTE Harmonised as EN 60076-11.
IEC 61558-2-16 NOTE Harmonised as EN 61558-2-16.

- 3 - EN 61558-2-14:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Annex ZA of EN 61558-1:2005 is applicable except as follows:

Publication Year Title EN/HD Year
In Annex ZA of EN 61558-1:2005 add:
IEC 61558-1 2005 Safety of power transformers, power EN 61558-1 2005
+ corr. March 2010 supplies, reactors and similar products - + corr. August 2006
+ corr. March 2008 Part 1: General requirements and tests + A1 2009
+ corr. April 2011
+ A1 2009
IEC 61558-2-14 ®
Edition 1.0 2012-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

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

Part 2-14: Particular requirements and tests for variable transformers and power

supply units incorporating variable transformers

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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.180 ISBN 978-2-83220-499-3

– 2 – 61558-2-14 © IEC:2012
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 8
3 Terms and definitions . 8
4 General requirements . 9
5 General notes on tests . 9
6 Ratings . 10
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 . 20
21 Internal wirings . 20
22 Supply connection and other external flexible cables or cords . 20
23 Terminals for external conductors . 20
24 Provision for protective earthing . 20
25 Screws and connections . 21
26 Creepage distances, clearances and distances through insulation . 21
27 Resistance to heat, fire and tracking . 21
28 Resistance to rusting . 21
Annexes . 22
Bibliography . 23

Table 101 – Output voltages difference for auto transformers, separating and safety
isolating transformers . 14
Table 102 – Output voltages difference for isolating transformers . 14
Table 103 – Maximum permitted temperatures of the winding . 15

61558-2-14 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATION THEREOF –

Part 2-14: Particular requirements and tests for variable transformers
and power supply units incorporating variable transformers

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 internat
...