EN 61558-2-16:2009

SLOVENSKI STANDARD
01-februar-2010
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Safety of transformers, reactors, power supply units and similar products for voltages up
to 1100 V -- Part 2-16: Particular requirements and tests for switch mode power supply
units and transformers for switch mode power supply units
Sicherheit von Transformatoren, Drosseln, Netzgeräten und dergleichen für
Versorgungsspannungen bis 1100 V – Teil 2-16: Besondere Anforderungen und
Prüfungen an Schaltnetzteilen (SMPSU) und Transformatoren in Schaltnetzteilen.
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 61558-2-16:2009
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61558-2-16
NORME EUROPÉENNE
December 2009
EUROPÄISCHE NORM
ICS 29.180 Supersedes EN 61558-2-17:1997

English version
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
(IEC 61558-2-16:2009)
Sécurité des transformateurs,  Sicherheit von Transformatoren,
bobines d'inductance, blocs d'alimentation Drosseln, Netzgeräten und dergleichen
et produits analogues pour des tensions für Versorgungsspannungen bis 1 100 V -
d'alimentation jusqu'à 1 100 V - Teil 2-16: Besondere Anforderungen
Partie 2-16: Règles particulières et essais und Prüfungen an Schaltnetzteilen
pour les blocs d'alimentation à découpage (SMPSU) und Transformatoren
et les transformateurs pour in Schaltnetzteilen
blocs d'alimentation à découpage (IEC 61558-2-16:2009)
(CEI 61558-2-16:2009)
This European Standard was approved by CENELEC on 2009-10-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61558-2-16:2009 E
Foreword
The text of document 96/330/FDIS, future edition 1 of IEC 61558-2-16, prepared by IEC TC 96,
Transformers, reactors, power supply units and similar products for low voltage up to 1 100 V, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61558-2-16 on
2009-10-01.
This European Standard supersedes EN 61558-2-17:1997.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-10-01
This standard is to be used in conjunction with EN 61558-1 and its amendments. It is based on
EN 61558-1:2005.
This Part 2-16 supplements or modifies the corresponding clauses in EN 61558-1, so as to convert that
publication into the European Standard: Particular requirements and tests for switch mode power supply
units and transformers for switch mode power supply units.
When a particular subclause of Part 1 is not mentioned in this part, that subclause applies as far as is
reasonable. Where this standard 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 standard, 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.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61558-2-16:2009 was approved by CENELEC as a European
Standard without any modification.
__________
– 3 – EN 61558-2-16:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
Addition to Annex ZA of EN 61558-1:

Publication Year Title EN/HD Year

1)
IEC 60227 Series Polyvinyl chloride insulated cables of rated – –
voltages up to and including 450/750 V

2) 3)
IEC 60364-4-41 – Low-voltage electrical installations - HD 60364-4-41 2007
(mod) Part 4-41: Protection for safety - Protection + corr. July 2007
against electric shock
2) 3)
IEC 60601-1 – Medical electrical equipment - EN 60601-1 2006
Part 1: General requirements for basic safety
and essential performance
IEC 60664-4 2005 Insulation coordination for equipment within EN 60664-4 2006
low-voltage systems - + corr. October 2006
Part 4: Consideration of high-frequency
voltage stress
2) 3)
IEC 60950-1 (mod) – Information technology equipment - Safety - EN 60950-1 2006
Part 1: General requirements + A11 2009

2) 3)
IEC 61010-1 – Safety requirements for electrical equipment EN 61010-1 2001
for measurement, control and laboratory use - + corr. June 2002
Part 1: General requirements
IEC 61204-7 2006 Low voltage power supplies, d.c. output - EN 61204-7 2006
Part 7: Safety requirements + A11 2009

IEC 61347 (mod) Series Lamp controlgear EN 61347 Series

IEC 61558-1 2005 Safety of power transformers, power supplies, EN 61558-1 2005
reactors and similar products - + corr. August 2006
Part 1: General requirements and tests

2) 3)
IEC 61558-2-1 – Safety of power transformers, power supplies, EN 61558-2-1 2007
reactors and similar products -
Part 2-1: Particular requirements and tests for
separating transformers and power supplies
incorporating separating transformers for
general applications
2) 3)
IEC 61558-2-4 – Safety of transformers, reactors, power EN 61558-2-4 2009
supply units and similar products for supply
voltages up to 1 100 V -
Part 2-4: Particular requirements and tests for
isolating transformers and power supply units
incorporating isolating transformers

1)
The HD 21 series, which is related to, but not directly equivalent with the IEC 60227 series, applies instead.
2)
Undated reference.
3)
Valid edition at date of issue.

Publication Year Title EN/HD Year

2) 3)
IEC 61558-2-6 – Safety of transformers, reactors, power EN 61558-2-6 2009
supply units and similar products for supply
voltages up to 1 100 V -
Part 2-6: Particular requirements and tests for
safety isolating transformers and power
supply units incorporating safety isolating
transformers
2) 3)
IEC 61558-2-13 – Safety of transformers, reactors, power EN 61558-2-13 2009
supply units and similar products for supply
voltages up to 1 100 V -
Part 2-13: Particular requirements and tests
for auto transformers and power supply units
incorporating auto transformers

IEC 62040 Series Uninterruptible Power Systems (UPS) EN 62040 Series

IEC 61558-2-16 ®
Edition 1.0 2009-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
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
V
CODE PRIX
ICS 29.180 ISBN 2-8318-1047-2
– 2 – 61558-2-16 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references.8
3 Terms and definitions .9
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.11
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 .13
14 Heating.13
15 Short-circuit and overload protection .13
16 Mechanical strength.14
17 Protection against harmful ingress of dust, solid objects and moisture.14
18 Insulation resistance, dielectric strength and leakage current .14
19 Construction .14
20 Components .18
21 Internal wiring .18
22 Supply connection and other external flexible cables or cords.19
23 Terminals for external conductors .19
24 Provisions for protective earthing .19
25 Screws and connections .19
26 Creepage distances, clearances and distances through insulation .19
27 Resistance to heat, fire and tracking .32
28 Resistance to rusting .32
Annexes.33
Annex AA (informative) Partial discharge (PD) test .33
Annex BB (normative) Particular requirements for associated transformers for use in
switch mode power supplies with internal frequencies > 500 Hz .33

Figure 101 – Diagram for dimensioning of clearances.20
Figure 102 – Diagram of dimensioning creepage distances.24
Figure 103 – Permissible field strength for dimensioning of solid insulation according to
Equation (1) .
...