EN 61558-2-15:2001

Safety of power transformers, power supply units and similar - Part 2-15: Particular requirements for isolating transformers for the supply of medical locations

This part 2-15 of IEC 61558 applies to stationary, single-phase or polyphase, air-cooled (natural or forced) isolating transformers for the supply of group II medical locations, designed to be permanently connected to the fixed wiring of IT supply system. This standard also applies to transformers incorporating electronic circuits. This standard does not apply to external circuits and their components intended to be connected to the input and output terminals or socket-outlets of the transformer. It has the status of a group safety publication in accordance with IEC Guide 104. This part 2 is intended to be used in conjunction with IEC 61558-1.

Sicherheit von Transformatoren, Netzgeräten und dergleichen - Teil 2-15: Besondere Anforderungen an Trenntransformatoren zur Versorgung medizinischer Räume

Sécurité des transformateurs, blocs d'alimentation et analogues - Partie 2-15: Règles particulières pour les transformateurs de séparation de circuits pour locaux à usages médicaux

La présente partie 2-15 de la CEI 61558 est applicable aux transformateurs de séparation de circuits fixes, monophasés ou polyphasés, à refroidissement par air (naturel ou forcé), destinés à alimenter des locaux à usages médicaux du groupe II et conçus pour être reliés en permanence au câblage fixe du système d'alimentation IT. Les transformateurs incorporant des circuits électroniques sont également couverts par cette norme. Cette norme ne s'applique pas aux circuits externes et à leurs composants connectés aux bornes ou aux socles de prise de courant du transformateur. Elle a le statut de publication groupée de sécurité conformément au Guide CEI 104. La présente partie 2 est destinée à être utilisée avec la CEI 61558-1.

Safety of power transformers, power supply units and similar - Part 2-15: Particular requirements for isolating transformers for the supply of medical locations

General Information

• Status: Withdrawn
• Publication Date: 12-Jun-2001
• Withdrawal Date: 31-Jul-2003
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/SR 96 - Small power transformers, reactors, power supply units and similar products
• Drafting Committee: IEC/TC 96 - IEC_TC_96
• Parallel Committee: IEC/TC 96 - IEC_TC_96
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 27-Dec-2014
• Completion Date: 27-Dec-2014
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: SIST EN 61558-2-15:2002 - Safety of power transformers, power supply units and similar -- Part 2-15: Particular requirements for isolating transformers for the supply of medical locations

Relations

• Replaced By: EN 61558-2-15:2012 - Safety of transformers, reactors, power supply units and combinations thereof - Part 2-15: Particular requirements and tests for isolating transformers for the supply of medical locations
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI SIST EN 61558-2-15:2002
prva izdaja
STANDARD
september 2002
Safety of power transformers, power supply units and similar - Part 2-15: Particular
requirements for isolating transformers for the supply of medical locations
ICS 29.180 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 61558-2-15
NORME EUROPÉENNE
EUROPÄISCHE NORM June 2001
ICS 29.180
English version
Safety of power transformers, power supply units and similar
Part 2-15: Particular requirements for isolating transformers for the
supply of medical locations
(IEC 61558-2-15:1999, modified)
Sécurité des transformateurs, blocs Sicherheit von Transformatoren,
d'alimentation et analogues Netzgeräten und dergleichen
Partie 2-15: Règles particulières pour les Teil 2-15: Besondere Anforderungen an
transformateurs de séparation de circuits Trenntransformatoren zur Versorgung
pour locaux à usages médicaux medizinischer Räume
(CEI 61558-2-15:1999, modifiée) (IEC 61558-2-15:1999, modifiziert)
This European Standard was approved by CENELEC on 2000-08-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and 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
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61558-2-15:2001 E
Foreword
The text of document 96/119/FDIS, future edition 1 of IEC 61558-2-15, prepared by IEC TC 96, Small
power transformers, reactors and power supply units: Safety requirements, was submitted to the
IEC/CENELEC parallel vote.
The CENELEC Technical Board asked BTTF 64-1 to assess the comments received and to prepare
common modifications, as appropriate. The text of the draft was submitted to the formal vote and was
approved by CENELEC as EN 61558-2-15 on 2000-08-01.
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) 2001-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2003-08-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
This Part 2-15 of EN 61558 is to be used in conjunction with EN 61558-1:1997.
This Part 2-15 supplements or modifies the corresponding clauses of EN 61558-1, so as to convert it into
the European Standard “Particular requirements for isolating transformers for the supply of medical
locations”.
When a particular clause or subclause of Part 1 is not mentioned in this Part 2-15, that clause or
subclause applies as far as is reasonable. Where this Part 2-15 states “addition”, “modification” or
“replacement”, the relevant text of Part 1 is to be adapted accordingly.
Subclauses, tables and figures which are in addition to those of Part 1 are numbered starting with 101.
The reference of subclauses, notes, figures and annexes which have been added by CENELEC is
prefixed with the letter Z.
There are no special national conditions (snc) causing a deviation from this European Standard other
than those listed in annex ZA of EN 61558-1.
__________
- 3 - EN 61558-2-15:2001
Endorsement notice
The text of the International Standard IEC 61558-2-15:1999 was approved by CENELEC as a European
Standard with agreed common modifications as given below.
COMMON MODIFICATIONS
1 Scope
Replace the second paragraph by:
This part 2-15 of EN 61558 applies to stationary, single-phase or polyphase, air-cooled (natural or forced)
isolating transformers for the supply of group II medical locations, designed to be permanently
connected to the fixed wiring and intended to form the IT system on the secondary side, having a rated
supply voltage not exceeding AC 1 kV and rated frequency not exceeding 500 Hz. The rated output
shall not be less than 0,5 kVA and shall not exceed 10 kVA.
Add:
NOTE Z1  Transformers for medical appliance are not covered by this standard.
8 Marking and other information
8.14 Addition:
The instruction sheet has to state that screens the connection of which to earth is necessary for
compliance with the standard (e.g. compliance with clause 18 on leakage current) has to be connected to
earth.
18 Insulation resistance and dielectric strength
Replace the addition by:
18.101 Void
18.102 Void
18.Z101 The leakage current of the output winding to earth, measured in no-load condition, at room
temperature and the transformer supplied at rated voltage and rated frequency, as shown in Figure Z101,
shall not exceed 0,5 mA.
For this test the core and the functional screen, if any, shall be connected to earth.
Compliance is checked by measurements.
18.Z102 The leakage current of the enclosure to earth, measured in no-load condition, at room
temperature and the transformer supplied at rated voltage and rated frequency, as shown in Figure 104,
shall not exceed 3,5 mA.
For this test the core and the functional screen, if any, shall be connected to earth.
Compliance is checked by measurements.

19 Construction
Order the subclauses correctly according to the numbering as follows:
19.1
19.1.1 up to 19.1.4
19.101 up to 19.121
Figures
Delete the figures 101 and 102 and add the figures Z101 and Z102:
Transformer
Variable isolating
under test
transformer
L
S1
T1
S2
SEC
PRI
Mains
V
N
Core
Screen
PE
mA
a) The test shall be carried out with all combinations of S1 and S2
b) For three-phase (or polyphase) transformers the switch S1 is used only in closed position. The measurements with
switch S2 are repeated connecting it to all phases, in turn.
c) The current is measured with an ammeter of negligible impedance.
Figure Z101 - Measuring circuit for the leakage current of the output winding to earth

- 5 - EN 61558-2-15:2001
Variable isolating Transformer
transformer underdt testt
L
S1
T1
SEC
PRI
Mains
V
N
Core
Screen
PE
Enclosure
mA
a) The test shall be carried out with all combinations of S1.
b) For three-phase (or polyphase) transformers the switch S1 is used only in closed position.
c) The current is measured with an ammeter of negligible impedance.
Figure Z102 - Measuring circuit for the leakage current of the enclosure to earth

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60252 (mod) 1993 A.C. motor capacitors EN 60252 1994
+ corr. May 1994
IEC 60364-3 (mod) 1993 Electrical installations of buildings HD 384.3 S2 1995
Part 3: Assessment of general
characteristics
NORME
CEI
INTERNATIONALE
IEC
61558-2-15
INTERNATIONAL
Première édition
STANDARD
First edition
1999-02
PUBLICATION GROUPÉE DE SÉCURITÉ
GROUP SAFETY PUBLICATION
Sécurité des transformateurs,
blocs d'alimentation et analogues –
Partie 2-15:
Règles particulières pour les transformateurs
de séparation de circuits pour locaux
à usages médicaux
Safety of power transformers,
power supply units and similar –
Part 2-15:
Particular requirements for isolating transformers
for the supply of medical locations
 IEC 1999 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
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Telefax: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
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Commission Electrotechnique Internationale
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

61558-2-15 © IEC:1999 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
__________
SAFETY OF POWER TRANSFORMERS,
POWER SUPPLY UNITS AND SIMILAR –
Part 2-15: Particular requirements for isolating transformers for
the supply of medical locations
FOREWORD
1) The IEC (International Electrotechnical Commission) is a world-wide organisation for standardisation comprising all
national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The IEC
collaborates closely with the International Organisation for Standardisation (ISO) in accordance with conditions
determined by agreement between the two organisations.
2) The formal decisions or agreements of the 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
National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form of
standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards
transparently to the maximum extent possible in their national and regional standards. Any divergence between the
IEC Standard and the corresponding national or regional standard shall be clearly indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patents rights. The IEC shall not be held responsible for identifying any or all such patents rights.
International standard IEC 61558-2-15 has been prepared by technical committee 96: Small
power transformers, reactors and power supply units and special transformers, reactors and
power supply units: Safety requirements.
It 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).
The text of this standard is based on the following documents:
FDIS Report on Voting
96/119/FDIS 96/124/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 part 2 is intended to be used in conjunction with IEC 61558-1. It was established on the
basis of the first edition (1997) of that standard.
This part 2 supplements or modifies the corresponding clauses in IEC 61558-1, so as to
convert that publication into the IEC standard: Particular requirements for isolating
transformers for the supply of medical locations.

61558-2-15 © IEC:1999 – 5 –
When a particular subclause of part 1 is not mentioned in this part 2, 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 standard, 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 the standard, the words in bold are defined in clause 3.
Subclauses which are additional to those in part 1 are numbered starting from 101;
supplementary annexes are entitled AA, BB, etc.

61558-2-15 © IEC:1999 – 7 –
SAFETY OF POWER TRANSFORMERS,
POWER SUPPLY UNITS AND SIMILAR –
Part 2-15: Particular requirements for isolating transformers for
the supply of medical locations
1 Scope
Replacement:
This international standard deals with all aspects of safety such as electrical, thermal and
mechanical.
This part 2-15 of IEC 61558 applies to stationary, single-phase or polyphase, air-cooled
(natural or forced) isolating transformers for the supply of group II medical locations,
designed to be permanently connected to the fixed wiring of IT supply system, having a rated
supply voltage
...