IEC 61558-2-16:2009/AMD1:2013

IEC 61558-2-16 ®
Edition 1.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

AMENDMENT 1
AMENDEMENT 1
Safety of transformers, reactors, power supply units and similar products for
supply voltages up to 1 100 V –
Part 2-16: Particular requirements and tests for switch mode power supply units
and transformers for switch mode power supply units

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

IEC 61558-2-16:2009/A1:2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les
microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: csc@iec.ch.

A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.

Liens utiles:
Recherche de publications CEI - www.iec.ch/searchpub Electropedia - www.electropedia.org
La recherche avancée vous permet de trouver des Le premier dictionnaire en ligne au monde de termes
publications CEI en utilisant différents critères (numéro de électroniques et électriques. Il contient plus de 30 000
référence, texte, comité d’études,…). termes et définitions en anglais et en français, ainsi que
Elle donne aussi des informations sur les projets et les les termes équivalents dans les langues additionnelles.
publications remplacées ou retirées. Egalement appelé Vocabulaire Electrotechnique
International (VEI) en ligne.
Just Published CEI - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications de la CEI.
Just Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur
Disponible en ligne et aussi une fois par mois par email. cette publication ou si vous avez des questions
contactez-nous: csc@iec.ch.
IEC 61558-2-16 ®
Edition 1.0 2013-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

AMENDMENT 1
AMENDEMENT 1
Safety of transformers, reactors, power supply units and similar products for

supply voltages up to 1 100 V –

Part 2-16: Particular requirements and tests for switch mode power supply units

and transformers for switch mode power supply units

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

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX M
ICS 29.180 ISBN 978-2-8322-0996-7

– 2 – 61558-2-16 Amend. 1 © IEC:2013
FOREWORD
This amendment has been prepared by IEC technical committee 96: Transformers, reactors,
power supply units, and combinations thereof.
The text of this amendment is based on the following documents:
FDIS Report on voting
96/401/FDIS 96/405/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
_____________
INTRODUCTION to the Amendement
This amendment has been prepared to allow the use of FIW wires in SMPS.
The manufacturer should be careful, that during production and transport no damage of the
FIW wire will be possible.
_____________
2 Normative references
Add, to the existing list of references, the following new references:
IEC 60317-0-7:2012, Specifications for particular types of winding wires – Part 0-7: General
requirements – Fully insulated (FIW) zero-defect enamelled round copper wire with nominal
conductor diameter of 0,040 mm to 1,600 mm

61558-2-16 Amend. 1 © IEC:2013 – 3 –
IEC 60317-43, Specifications for particular types of winding wires – Part 43: Aromatic
polyimide tape wrapped round copper wire, class 240
IEC 60317-56, Specifications for particular types of winding wires – Part 56: Solderable fully
insulated (FIW) zero-defect polyurethane enamelled round copper wire with nominal
conductor diameter 0,040 mm to 1,600 mm, class 180
IEC 60851-3:2009, Winding wires – Test methods – Part 3: Mechanical properties
IEC 60851-5:2008, Winding wires – Test methods – Part 5: Electrical properties
3 Terms and definitions
Add, at the end of the existing text, the following new instruction and new terms and
definitions as follows:
Addition:
3.101
FIW
fully insulated winding wire
wire according to IEC 60317-0-7, IEC 60317-56 and IEC 60851-5:2008 which is a zero-defect
wire construction
3.102
zero-defect wire
winding wire that exhibits no electrical discontinuities when tested under specific conditions
3.103
grade of FIW
range of overall diameter of a wire (FIW3 – FIW9)
18 Insulation resistance, dielectric strength and leakage current
18.3
Add, after the existing Table 8a, the following new instruction:
Replacement of the text in footnote a of Table 8a:
a
For construction according to 26.2.4.1, test B the voltage is multiplied by the factor 1,25. For
the construction according to 26.2.4.2 the voltage is multiplied by the factor 1,35.
Add, after the existing subclause 18.101, the following new subclause and new figure:
18.102 A partial discharge test according to IEC 60664-1, (test description see below) shall
be performed, if FIW wires are used and if the recurring peak working voltage U across the
t
insulation is greater than 750 V. The relevant recurring peak voltage is the maximum
measured voltage between the input and the output circuit of the SMPS, if the secondary side
is earthed. The measuring shall be done at 1,0 of the maximum rated input voltage.
A partial discharge test shall be done at the transformer for the SMPS with the measured
recurring peak voltage U , greater than 750 V peak.
t
U is the maximum peak working voltage;
t
is 5 s;
t
– 4 – 61558-2-16 Amend. 1 © IEC:2013
t is 15 s.
Partial discharge shall be less than or equal to 10 pC at time t .
The test shall be done according to the following Figure 104.
For other applications higher values may be required (e.g. IEC 61800-5-1).
U
1,25 U
t
U
t
t
t t
1 1
IEC  1763/13
Figure 104 – Test voltages
19 Construction
Add, at the end of the existing text of this clause, the following new text:
19.12.3 Replacement:
Insulated winding wires, in an insulation system providing basic, supplementary or
reinforced insulation, shall meet the following requirements.
Wire that has multi-layer extruded or spirally wrapped insulation (where only the finished wire
can be tested) and passes the tests of Annex K.
The minimum number of constructional layers applied to the conductor shall be as follows:
– BASIC INSULATION: two wrapped layers or one extruded layer;
– SUPPLEMENTARY INSULATION: two layers, wrapped or extruded;
– REINFORCED INSULATION: three layers wrapped or extruded.
For spirally wrapped insulation where the CREEPAGE DISTANCES between layers, as wrapped,
are less than those given in Clause 26. for pollution degree 1, the path between layers shall
be sealed as for a cemented joint in 26.2.3, Test A and the test voltages of the TYPE TESTS in
Clause K.2 are increased to 1,35 times their normal values.
NOTE 1 One layer of material wound with more than 50 % overlap is considered to constitute two layers.

61558-2-16 Amend. 1 © IEC:2013 – 5 –
The finished component shall pass ROUTINE TEST for electric strength using the appropriate
value of test voltages in 18.3.
Compliance is checked by inspection and measurement and, if applicable, as specified in
Annex K.
a) Where the insulation on the winding wire is used to provide basic- or supplementary
insulation in a wound part:
– the insulated wire (for example polyimide or insulation of equivalent quality) shall
comply with Annex K;
– the insulation of one insulated winding wire shall consist of at least two layers for
supplementary insulation;
– the insulation of one insulated winding wire shall consist of at least one layer for
basic insulation;
– an insulation for mechanical separation which fulfil the electric strength test for basic
insulation shall be provided between the insulated wires and the enamelled wires.
NOTE 2 If for basic or supplementary insulation a triple insulated wire is used in combination with
enamelled wire, an additional interleaved insulation (mechanical separation) is not required.
b) Where the insulation on the winding wire is used to provide reinforced insulation in a
wound part:
– the insulated wire (for example polyimide or insulation of equivalent quality) shall
comply with Annex K;
– the insulation of one insulated winding wire shall consist of at least three layers;
– the insulation is subjected to the relevant dielectric strength test of 18.3.
Where the insulated winding wire is wound:
– upon metal or ferrite cores or
– upon enamelled wire or;
– under enamelled wire;
an insulation for mechanical separation which fulfil the electric strength test for basic
insulation shall be provided between the insulated wires and the core or between the
insulated wires and the enamelled wires. The both windings shall not touch each other and
both wires shall not touch the core.
NOTE 3 This requirement takes into consideration the mechanical production stress applied to the insulated
winding wires.
The manufacturer of the transformer shall demonstrate that the winding wire has been
subjected to 100 % routine dielectric strength test as in Clause K.3.
No requirements for creepage distances and clearances are applicable for the insulated
winding wires.
For windings providing reinforced insulation, no value is required in box 2) c) of Table 13,
Table C.1 and Table D.1 of Part 1 and no values are required of 26.106.
Compliance is checked by inspection of the part and the declaration of the wire manufacturer
19.12.101 The transformer which use fully insulated winding wires (FIW), shall only be used
up and including insulation class F.
19.12.102 Fully insulated winding wires (FIW) shall comply with IEC 60851-5:2008,
IEC 60317-0-7 and IEC 60317-56. If the wire has other nominal diameter than in Table 111
defined, so the minimum high voltage strength value can be calculated acco
...