EN IEC 61558-2-15:2025

SLOVENSKI STANDARD
oSIST prEN IEC 61558-2-15:2021
01-julij-2021
Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-15. del:
Posebne zahteve in preskusi za ločilne transformatorje za IT sisteme v
napajalnikih v medicinskih prostorih
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-
15: Particular requirements and tests for isolating transformers for medical IT systems for
the supply of medical locations
Sécurité des transformateurs, bobines d’inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-15: Exigences particulières et essais pour les
transformateurs de séparation de circuits pour schémas IT médicaux pour locaux à
usages médicaux
Ta slovenski standard je istoveten z: prEN IEC 61558-2-15:2021
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
oSIST prEN IEC 61558-2-15:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61558-2-15:2021

oSIST prEN IEC 61558-2-15:2021

96/508/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61558-2-15 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:

2021-04-30 2021-07-23
SUPERSEDES DOCUMENTS:
96/503/RR
IEC TC 96 : TRANSFORMERS, REACTORS, POWER SUPPLY UNITS, AND COMBINATIONS THEREOF
SECRETARIAT: SECRETARY:
Germany Mr Wolfgang Reichelt
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

SC 3C,TC 14,TC 22,SC 22E,SC 34C,TC 51,TC
55,TC 61,TC 62,SC 62A,TC 64,TC 66,TC 77,TC
Other TC/SCs are requested to indicate their interest, if
97,TC 106,TC 108,TC 109,TC 111,TC 112
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-15:
Particular requirements and tests for isolating transformers for medical IT systems for the
supply of medical locations
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it,
for any other purpose without permission in writing from IEC.

oSIST prEN IEC 61558-2-15:2021
61558-2-15/Ed.3/CDV © IEC(E) 2 96/508/CDV

1 CONTENTS
3 FOREWORD. 3
4 INTRODUCTION . 5
5 1 Scope . 6
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 General requirements . 8
9 5 General notes on tests . 8
10 6 Ratings . 8
11 7 Classification . 8
12 8 Marking and other information . 9
13 9 Protection against electric shock . 10
14 10 Change of input voltage setting . 10
15 11 Output voltage and output current under load . 10
16 12 No-load output voltage . 10
17 13 Short-circuit voltage . 11
18 13 Short-circuit voltage and inrush currents . 11
19 14 Heating . 12
20 15 Short-circuit and overload protection . 12
21 16 Mechanical strength . 12
22 17 Protection against harmful ingress of dust, solid objects and moisture . 12
23 18 Insulation resistance, dielectric strength and leakage current . 12
24 19 Construction . 15
25 20 Components . 17
26 21 Internal wiring . 17
27 22 Supply connection and other external flexible cable or cords . 17
28 23 Terminals for external conductors . 17
29 24 Provisions for protective earthing . 17
30 25 Screws and connections . 17
31 26 Creepage distances, clearances and distances through insulation . 17
32 27 Resistance to heat, fire and tracking . 18
33 28 Resistance to rusting . 18
34 Annexes . 19
35 Annex H - Electronic circuits . 19
36 Annex L - Routine tests (production tests) . 19
37 Bibliography . 20
39 Table 101 – Symbols indicating the kind of transformer . 10
oSIST prEN IEC 61558-2-15:2021
61558-2-15/Ed.3/CDV © IEC(E) 3 96/508/CDV

42 INTERNATIONAL ELECTROTECHNICAL COMMISSION
43 ____________
45 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND
46 COMBINATIONS THEREOF –
48 Part 2-15: Particular requirements and tests for isolating transformers for
49 medical IT systems for the supply of medical locations
53 FOREWORD
54 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
55 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
56 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
57 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
58 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
59 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
60 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
61 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
62 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
63 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
64 consensus of opinion on the relevant subjects since each technical committee has representation from all
65 interested IEC National Committees.
66 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
67 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
68 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
69 misinterpretation by any end user.
70 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
71 transparently to the maximum extent possible in their national and regional publications. Any divergence between
72 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
73 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
74 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
75 services carried out by independent certification bodies.
76 6) All users should ensure that they have the latest edition of this publication.
77 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
78 members of its technical committees and IEC National Committees for any personal injury, property damage or
79 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
80 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
81 Publications.
82 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
83 indispensable for the correct application of this publication.
84 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
85 rights. IEC shall not be held responsible for identifying any or all such patent rights.
86 International standard IEC 61558-2-15 has been prepared by IEC technical committee 96:
87 Transformers, reactors, power supply units and combinations thereof.
88 This third edition cancels and replaces the second edition published in 2011. It constitutes a
89 technical revision.
90 This edition includes the following significant technical changes with respect to the previous
91 edition:
92 a) Adjustment of structure and references in accordance with IEC 61558-1:2017;
oSIST prEN IEC 61558-2-15:2021
61558-2-15/Ed.3/CDV © IEC(E) 4 96/508/CDV

95 The text of this International Standard is based on the following documents:
Draft Report on voting
96/XXX/FDIS 96/XXX/RVD
97 Full information on the voting for its approval can be found in the report on voting indicated in
98 the above table.
99 The language used for the development of this International Standard is English.
100 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
101 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
102 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
103 described in greater detail at www.iec.ch/standardsdev/publications.
104 It has the status of a group safety publication in accordance with IEC Guide 104.
105 This International Standard is to be used in conjunction with IEC 61558-1:2017.
106 NOTE When “Part 1” is mentioned in this standard, it refers to IEC 61558-1:2017.
107 This document supplements or modifies the corresponding clauses in IEC 61558-1:2017, so as
108 to convert that publication into the IEC standard: Particular requirements and tests for isolating
109 transformers for the supply of medical locations – Transformer for medical IT systems.
110 A list of all parts in the IEC 61558 series published under the general title Safety of
111 transformers, reactors, power supply units and combinations thereof, can be found on the
112 IEC website.
113 Future standards in this series will carry the new general title as cited above. Titles of existing
114 standards in this series will be updated at the time of the next edition.
115 Where this document states "addition", "modification" or "replacement", the relevant text of
116 IEC 61558-1:2017 is to be adapted accordingly.
117 In this document, the following print types are used:
118 − requirements proper: in roman type;
119 − test specifications: in italic type;
120 − explanatory matter: in smaller roman type:
121 In the text of this document, the words in bold are defined in Clause 3.
122 Subclauses, notes, figures and tables additional to those in IEC 61558-1:2017 are numbered
123 starting from 101; supplementary annexes are entitled AA, BB, etc.
124 The committee has decided that the contents of this document will remain unchanged until the
125 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
126 the specific document. At this date, the document will be
127 • reconfirmed,
128 • withdrawn,
129 • replaced by a revised edition, or
130 • amended.
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