Low voltage power supplies, d.c. output - Part 7: Safety requirements

Spécifie les exigences de sécurité pour les ALIMENTATIONS générant une (des) sortie(s) continue(s) avec ou sans sortie(s) alternative(s) auxiliaire(s), et qui sont elles-mêmes alimentées par des sources alternatives ou continues ne dépassant pas 600 V en courant alternatif ou 1 000 V en courant continu

Stromversorgungsgeräte für Niederspannung mit Gleichstromausgang - Teil 7: Sicherheitsanforderungen

Alimentations basse tension, sortie continue - Partie 7: Exigences de sécurité


Nizkonapetostni napajalniki, enosmerni (d.c.) izhod - 7. del: Varnostne zahteve (IEC 61204-7:2006)

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Nizkonapetostni napajalniki, enosmerni (d.c.) izhod - 7. del: Varnostne zahteve
(IEC 61204-7:2006)
Low voltage power supplies, d.c. output -- Part 7: Safety requirements
Stromversorgungsgeräte für Niederspannung mit Gleichstromausgang - Teil 7:
Alimentations basse tension, sortie continue - Partie 7: Exigences de sécurité
Ta slovenski standard je istoveten z: EN 61204-7:2006
29.200 8VPHUQLNL3UHWYRUQLNL Rectifiers. Convertors.
6WDELOL]LUDQRHOHNWULþQR Stabilized power supply
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 61204-7
November 2006
ICS 29.200
English version
Low voltage power supplies, d.c. output
Part 7: Safety requirements
(IEC 61204-7:2006)
Alimentations basse tension,  Stromversorgungsgeräte
sortie continue für Niederspannung
Partie 7: Exigences de sécurité mit Gleichstromausgang
(CEI 61204-7:2006) Teil 7: Sicherheitsanforderungen
(IEC 61204-7:2006)
This European Standard was approved by CENELEC on 2006-10-01. 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, 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.

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

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61204-7:2006 E
The text of document 22E/101/FDIS, future edition 1 of IEC 61204-7, prepared by SC 22E, Stabilized
power supplies, of IEC TC 22, Power electronic systems and equipment, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61204-7 on 2006-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-07-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-10-01
with the EN have to be withdrawn
This standard does not follow the rules for structuring European Standards as given in Part 3 of the
CEN/CENELEC Internal Regulations because of the varied requirements which can apply to power
supplies. It assumes that all power supplies are required to meet either EN 60950:2000
(IEC 60950:1999, mod.) and/or EN 60950-1:2001 (IEC 60950-1:2001, mod.). In addition power
supplies may also have to meet the requirements of other standards dependent on the application. To
satisfy this need it was decided that all power supplies shall meet EN 60950:2000 and/or
EN 60950-1:2001 as described in the main body of this standard. The differences between these
requirements and those of other standards can then be optionally applied by applying any or all of the
appropriate annexes. This was done to avoid confusion.
The annexes of this standard are clearly described in 1.1.1.
EN 61204 (IEC 61024) consists of the following parts, under the general title Low voltage power
supplies, DC output:
Part 1: Reserved for future use.
Part 2: Performance characteristics1
Part 3: Electromagnetic compatibility (EMC)
Part 4: Tests other than EMC
Part 5: Reserved for future use.
Part 6: Requirements for low-voltage power supplies of assessed performance
Part 7: Safety requirements
This standard should be read in conjunction with EN 60950:2000 and/or EN 60950-1:2001.
It makes reference to the standard EN 60950:2000 and/or EN 60950-1:2001 in the form of “clause
number/RD”. In this context, “RD” means “Reference Document” i.e. EN 60950:2000 and/or
EN 60950-1:2001. Unless otherwise specified, RD means that both documents apply. However, it is
only necessary to apply one or other of these standards. Wherever the word equipment occurs in this
reference document, this means POWER SUPPLY. The annexes of EN 60950:2000 and/or
EN 60950-1:2001 are also referred to by means of "RD" where these are specific references,
otherwise these annexes apply as detailed in the clauses of these standards referred to in this
Under consideration
- 3 - EN 61204-7:2006
In this standard, the following print types are used:
– Requirements proper and normative annexes: in roman type.
– Compliance statements and test specifications: in italic type.
– Notes and other informative matter: in smaller roman type.
– Normative conditions within tables: in smaller roman type.
– Terms that are defined in 1.2: SMALL CAPITALS.
Annexes ZA and ZB have been added by CENELEC.
Endorsement notice
The text of the International Standard IEC 61204-7:2006 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Annex PS-Q, Bibliography, the following notes have to be added for the
standards indicated:
IEC 60601-1 NOTE  Harmonized as EN 60601-1:1990 (not modified).
IEC 60601-1 NOTE  Harmonized as EN 60601-1:2006 (not modified).
IEC 60950 NOTE  Harmonized as EN 60950:2000 (modified).
IEC 60950-1 NOTE  Harmonized as EN 60950-1:2001 (modified).
Annex ZA
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. 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
Publication Year Title EN/HD Year

IEC 60065 (mod) 2001 Audio, video and similar electronic EN 60065 2002
apparatus - Safety requirements + corr. March 2006

IEC 60146-1-1 1991 Semiconductor convertors - General EN 60146-1-1 1993
requirements and line commutated
convertors -
Part 1-1: Specifications of basic
IEC 60364-4-41 2001 Electrical installations of buildings - – –
Part 4-41: Protection for safety - Protection
against elctric shock
IEC 60417 data- Graphical symbols for use on equipment –

IEC 61347-2-2 2000 Lamp controlgear - EN 61347-2-2 2001
Part 2-2: Particular requirements for d.c. or + corr. July 2003
a.c. supplied electronic step-down
convertors for filament lamps
IEC 61558-1 2005 Safety of power transformers, power EN 61558-1 2005
supplies, reactors and similar products - + corr. August 2006
Part 1: General requirements and tests

IEC 62040-1-1 2002 Uninterruptible power systems (UPS) -
+ corr. December 2002 Part 1-1: General and safety requirements EN 62040-1-1 2003
+ corr. February 2004 for UPS used in operator access areas + corr. August 2004

IEC 60364-4-41:2001 is superseded by IEC 60364-4-41:2005, which has been harmonized with common
modifications as HD 60364-4-41:2006

- 5 - EN 61204-7:2006
Annex ZB
Special national conditions
Special national condition: National characteristic or practice that cannot be changed even over a
long period, e.g. climatic conditions, electrical earthing conditions.
NOTE  If it affects harmonization, it forms part of the European Standard / Harmonization Document.
For the countries in which the relevant special national conditions apply these provisions are
normative, for other countries they are informative.
Clause Special national condition
2.9.5 Denmark
When using this method of protection it is allowed that 230 V socket-outlet is used either
with or without earth according to The Danish Heavy Current Regulation part 107-2-D1.
• On transportable inverters, portable socket-outlets according to e.g. standard sheets
DK 1-3a, DKA 1-3a or DKA 1-4a shall be used.
• On inverters for fixed installation it is allowed to use socket-outlets for fixed
installation, according to e.g. standard sheets DK 1-1a (built together with a switch) or
DK 1-1b.
If there is no reinforced insulation between the SELV circuit and the 230 V side, it shall be
described which precautions have been taken as an alternative to reach the same level of
safety. It can for example be the following:
• The inverter’s metal enclosure has been connected to minus on the SELV side by the
manufacturer. The inverter is in this case only allowed with a 230 V socket-outlet for
class II appliances (The Danish Heavy Current Regulation part 107-2-D1, standard
sheet DKA 1-4a).
This method of protection gives equipotential bonding between exposed conductive
parts. When using socket-outlet for class II equipment it is also prevented that a class
I appliance can be connected, without connection between protective earth and the
enclosure of the appliance (e.g. an appliance with Schuko plug).

It must appear from the accompanying instructions that it is prohibited and can be
connected with risk of electric shock to connect an appliance that is not double
insulated by for instance using an illegal extension cord or an illegal supply cord on a
class I appliance.
It shall be ensured that the inverter can withstand the influences and external conditions it
may be exposed to. Since no safety standard exists, which specifically covers these
products and their special use, a risk assessment must be made regarding electrical,
thermal and mechanical safety of the product.
Première édition
First edition
Alimentations basse tension,
sortie continue –
Partie 7:
Exigences de sécurité
Low-voltage power supplies,
d.c. output –
Part 7:
Safety requirements
 IEC 2006 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 photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
Commission Electrotechnique Internationale
International Electrotechnical Commission
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For price, see current catalogue

61204-7  IEC:2006 – 3 –

0 Principles of Safety .13
1 General .13
1.1 Scope.13
1.2 Definitions .15
1.3 General requirements.19
1.4 General conditions for tests.19
1.5 Components .21
1.6 Power interface .23
1.7 Marking and instructions.23
2 Protection from hazards .25
2.1 Protection from electric shock and energy hazards.25
2.2 SELV circuits.27
2.3 TNV circuits.27
2.4 Limited current circuits .27
2.5 Limited power sources.27
2.6 Provisions for earthing and bonding .27
2.7 Overcurrent and earth fault protection in primary circuits.29
2.8 Safety interlocks.

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