Safety of power transformers, power supplies, reactors and similar products - Part 2-7: Particular requirements and tests for transformers and power supplies for toys

This part of IEC 61558 deals with safety aspects of transformers for toys and power supplies incorporating transformers for toys such as electrical, thermal and mechanical safety. This second edition cancels and replaces the first edition published in 1997. It constitutes a technical revision. The main changes consist of updating this Part 2-7, in accordance with Part 1, edition 2, and adding power supplies to the scope. This Part 2-7 has the status of a group safety publication in accordance with IEC Guide 104.

Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-7: Besondere Anforderungen und Prüfungen an Transformatoren und Netzgeräte für Spielzeuge

Sécurité des transformateurs, alimentations, bobines d'inductance et produits analogues - Partie 2-7: Règles particulières et essais pour transformateurs et alimentations pour jouets

La présente partie de la CEI 61558 traite des aspects relatifs à la sécurité des transformateurs pour jouets et des alimentations incorporant des transformateurs pour jouets tels que les aspects de sécurité électrique, thermique et mécanique. Cette deuxième édition annule et remplace la première édition publiée en 1997. Elle constitue une révision technique. Les principales modifications consistent en la mise à jour de cette Partie 2-7 conformément à la Partie 1 édition 2, et en l'ajout des alimentations dans le domaine d'application. Cette Partie 2-7 a le statut de publication groupée de sécurité conformément au guide CEI 104.

Varnost močnostnih transformatorjev, napajalnikov, reaktorjev in podobnih izdelkov - 2-7. del: Posebne zahteve za transformatorje in napajalnike za igrače (IEC 61558-2-7:2007, spremenjen)

General Information

Status
Published
Publication Date
29-Oct-2007
Current Stage
6060 - Document made available
Due Date
30-Oct-2007
Completion Date
30-Oct-2007

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SLOVENSKI STANDARD
SIST EN 61558-2-7:2008
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
SIST EN 61558-2-7:2008 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
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
---------------------- Page: 2 ----------------------
EN 61558-2-7:2007 – 2 –
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.

__________
---------------------- Page: 3 ----------------------
– 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
IEC 60227-1 – Polyvinyl chloride insulated cables of rated – –
voltages up to and including 450/750 V -
Part 1: General requirements
IEC 60245-1 – Rubber insulated cables - Rated voltages up – –
to and including 450/750 V -
Part 1: General requirements

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.

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.

---------------------- Page: 4 ----------------------
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

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photo-copie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 5 ----------------------
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

---------------------- Page: 6 ----------------------
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

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 accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International standard IEC 61558-2-7 has been prepared by IEC technical committee 96:

Small power transformers, reactors, power supply units and similar products.

This second edition cancels and replaces the first edition published in 1997. It constitutes a

technical revision. The main changes consist of updating this Part 2-7, in accordance with

Part 1, edition 2, and adding power supplies to the scope.

This Part 2-7 has the status of a group safety publication in accordance with IEC Guide 104:

The preparation of safety publications and the use of basic safety publications and group

safety publications (1997).
---------------------- Page: 7 ----------------------
61558-2-7 © IEC:2007 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
96/254/FDIS 96/267/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

This Part 2-7 is intended to be used in conjunction with the last edition of IEC 61558-1 and its

amendments. It is based on the second edition (2005) of that standard.

This Part 2-7 supplements or modifies the corresponding clauses in IEC 61558-1, so as to

convert that publication into the IEC standard: Particular requirements and tests for

transformers and power supplies for toys.

The list of all the parts of the IEC 61558 series, under the general title Safety of power

transformers, power supply units and similar products, can be found on the IEC website.

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.

The committee has decided that the contents of this publication will remain unchanged until

the maintenance result 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.
---------------------- Page: 8 ----------------------
61558-2-7 © IEC:2007 – 9 –
SAFETY OF POWER TRANSFORMERS, POWER SUPPLIES
REACTORS AND SIMILAR PRODUCTS –
Part 2-7: Particular requirements and tests
for transformers and power supplies for toys
1 Scope
Replacement:

This part of IEC 61558 deals with safety aspects of transformers for toys and power

supplies incorporating transformers for toys such as electrical, thermal and mechanical

safety.

This Part 2-7 is applicable to transformers for toys and power supplies incorporating both

transformers for toys and electronic circuits. This Part 2-7 is not applicable to external

circuits and their components intended to be connected to the input terminals, output

terminals or socket-outlets of the transformers and power supplies.

This Part 2-7 applies to stationary and portable, single-phase, air-cooled (natural or forced),

transformers for toys and power supplies incorporating transformers for toys, having a

rated supply voltage not exceeding 250 V a.c., a rated supply and internal operating

frequency not exceeding 500 Hz, a rated output not exceeding 200 VA and a rated output

current not exceeding 10 A.

This Part 2-7 is applicable to independent transformers and transformers for specific use.

This Part 2-7 is applicable to dry-type transformers for toys. The windings may be

encapsulated or non-encapsulated.

The no-load output voltage does not exceed 33 V a.c. for transformers for toys and power

supplies incorporating transformers for toys, or 46 V ripple-free d.c. for power supplies

incorporating transformers for toys, and the rated output voltage does not exceed 24 V

a.c. for transformers and power supplies, or 33 V ripple-free d.c. for power supplies.

In general, this Part 2-7 does not take into consideration children playing with
...

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