EN 61558-2-7:2007

SLOVENSKI STANDARD
01-januar-2008
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SIST EN 61558-2-7:1999
SIST EN 61558-2-7:1999/A11:2003
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Safety of power transformers, power supplies, reactors and similar products - Part 2-7:
particular requirements and tests for transformers for toys
Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-7:
Besondere Anforderungen und Prüfungen an Transformatoren für Spielzeuge
Sécurité des transformateurs, alimentations, bobines d'inductance et produits analogues
- Partie 2-7: Regles particulieres et essais pour transformateurs et alimentations pour
jouets
Ta slovenski standard je istoveten z: EN 61558-2-7:2007
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61558-2-7
NORME EUROPÉENNE
October 2007
EUROPÄISCHE NORM
ICS 29.180 Supersedes EN 61558-2-7:1997 + A11:2002

English version
Safety of power transformers, power supplies,
reactors and similar products -
Part 2-7: Particular requirements and tests
for transformers and power supplies for toys
(IEC 61558-2-7:2007, modified)

Sécurité des transformateurs, Sicherheit von Transformatoren,
alimentations, bobines d'inductance Netzgeräten, Drosseln und dergleichen -
et produits analogues - Teil 2-7: Besondere Anforderungen
Partie 2-7: Règles particulières und Prüfungen an Transformatoren
et essais pour transformateurs für Spielzeuge
et alimentations pour jouets (IEC 61558-2-7:2007, modifiziert)
(CEI 61558-2-7:2007, modifiée)

This European Standard was approved by CENELEC on 2007-09-01. 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: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61558-2-7:2007 E
Foreword
The text of document 96/254/FDIS, future edition 2 of IEC 61558-2-7, 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 61558-2-7 on
2007-09-01 with inclusion of a common modification intended to align this European Standard with
EN 62115:2005.
This European Standard supersedes EN 61558-2-7:1997 + A11:2002.
The main changes consist of updating EN 61558-2-7:1997, in accordance with EN 61558-1:2005, and
adding power supplies to the scope.
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) 2008-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-09-01
This Part 2-7 is intended to be used in conjunction with EN 61558-1:2005.
This Part 2-7 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 transformers and power
supplies for toys.
When a particular subclause of Part 1 is not mentioned in this Part 2-7, 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 2-7, 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 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 61558-2-7:2007 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
Replace subclause 20.103 by:
20.103 The operating means of control devices, if any, shall not be affixed to the transformers.
__________
– 3 – EN 61558-2-7:2007
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 60227-1 – Polyvinyl chloride insulated cables of rated – –
voltages up to and including 450/750 V -
Part 1: General requirements
2)
IEC 60245-1 – Rubber insulated cables - Rated voltages up – –
to and including 450/750 V -
Part 1: General requirements
1)
Undated reference. HD 21.1 S4:2002, Cables of rated voltages up to and including 450/750 V and having thermoplastic
insulation - Part 1: General requirements, which is related to, but not directly equivalent with, IEC 60227-1, applies instead.
2)
Undated reference. HD 22.1 S4:2002, Cables of rated voltages up to and including 450/750 V and having cross-linked
insulation - Part 1: General requirements, which is related to, but not directly equivalent with, IEC 60245-1, applies instead.

NORME CEI
INTERNATIONALE
IEC
61558-2-7
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2007-01
PUBLICATION GROUPÉE DE SÉCURITÉ
GROUP SAFETY PUBLICATION
Sécurité des transformateurs, alimentations,
bobines d'inductance et produits analogues –
Partie 2-7:
Règles particulières et essais pour transformateurs
et alimentations pour jouets
Safety of power transformers, power supplies,
reactors and similar products –
Part 2-7:
Particular requirements and tests for transformers
and power supplies for toys
© IEC 2007 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
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microfilms, sans l'accord écrit de l'éditeur. the publisher.
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PRICE CODE
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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61558-2-7 © IEC:2007 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9
2 Normative references .11
3 Terms and definitions .11
4 General requirements .11
5 General notes on tests .11
6 Ratings.13
7 Classification.13
8 Marking and other information .15
9 Protection against electric shock .15
10 Change of input voltage setting .17
11 Output voltage and output current under load .17
12 No-load output voltage .19
13 Short-circuit voltage .19
14 Heating .19
15 Short-circuit and overload protection .21
16 Mechanical strength .21
17 Protection against harmful ingress of dust, solid objects and moisture.25
18 Insulation resistance, dielectric strength and leakage current .25
19 Construction .25
20 Components .27
21 Internal wiring.31
22 Supply connection and other external flexible cables or cords .31
23 Terminals for external conductors.31
24 Provisions for protective earthing .31
25 Screws and connections .31
26 Creepage distances, clearances, and distances through insulation.33
27 Resistance to heat, abnormal heat, fire and tracking .33
28 Resistance to rusting.33

Figure 101 – Small test finger .17
Figure 102 – Arrangement for impact test for transformers (see 16.101) .23

61558-2-7 © IEC:2007 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
SAFETY OF POWER TRANSFORMERS, POWER SUPPLIES,
REACTORS AND SIMILAR PRODUCTS –

Part 2-7: Particular requirements and tests
for transformers and power supplies for toys

FOREWORD
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