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Withdrawn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
Current Stage
6060 - Document made available
Start Date
13-Jun-2001
Completion Date
13-Jun-2001

RELATIONS

Buy Standard

Standard
EN 61558-2-15:2002
English language
22 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

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
SIST EN 61558-2-15:2002(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------
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
---------------------- Page: 2 ----------------------
EN 61558-2-15:2001 - 2 -
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.
__________
---------------------- Page: 3 ----------------------
- 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.
---------------------- Page: 4 ----------------------
EN 61558-2-15:2001 - 4 -
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
SEC
PRI
Mains
Core
Screen
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

---------------------- Page: 5 ----------------------
- 5 - EN 61558-2-15:2001
Variable isolating Transformer
transformer underdt testt
SEC
PRI
Mains
Core
Screen
Enclosure
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

---------------------- Page: 6 ----------------------
EN 61558-2-15:2001 - 6 -
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
---------------------- Page: 7 ----------------------
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.

International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE P
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 8 ----------------------
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.
---------------------- Page: 9 ----------------------
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.
---------------------- Page: 10 ----------------------
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 not exceeding 1 000 V a.c. and rated frequency not exceeding 500 Hz. The

rated output shall not be less than 3 kVA and shall not exceed 10 kVA.
NOTE 1 – Details of IT supply systems are to be found in IEC 60364-3.

NOTE 2 – The wiring rules for group II medical locations are under consideration [1] .

The no-load output voltage and the rated output voltage shall not exceed 250 V a.c. single-

phase or polyphase (phase-to-phase voltage).

Isolating transformers are used where double or reinforced insulation between circuits is

required by the installation rules or by the appliance specification.
This standard is applicable to dry-type transformers. T
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.