oSIST prEN IEC 61558-2-10:2023
(Main)Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-10: Particular requirements and tests for separating transformers with high insulation level and separating transformers with output voltages exceeding 1 000 V
Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-10: Besondere Anforderungen und Prüfungen an Netztransformatoren mit hohem Isolationspegel und Netztransformatoren mit Ausgangsspannungen über 1 000 V
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des combinaisons de ces éléments - Partie 2-10: Règles particulières et essais pour les transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et pour les transformateurs d'isolement à enroulements séparés à tensions secondaires supérieures à 1 000 V
Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-10. del: Posebne zahteve in preskusi za ločilne transformatorje z visoko izolacijsko stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 61558-2-10:2023
01-januar-2023
Varnost transformatorjev, dušilk, napajalnikov in njihovih kombinacij - 2-10. del:
Posebne zahteve in preskusi za ločilne transformatorje z visoko izolacijsko
stopnjo in ločilne transformatorje z izhodnimi napetostmi nad 1000 V
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-
10: Particular requirements and tests for separating transformers with high insulation
level and separating transformers with output voltages exceeding 1 000 V
Sicherheit von Transformatoren, Netzgeräten, Drosseln und dergleichen - Teil 2-10:
Besondere Anforderungen und Prüfungen an Netztransformatoren mit hohem
Isolationspegel und Netztransformatoren mit Ausgangsspannungen über 1 000 V
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et des
combinaisons de ces éléments - Partie 2-10: Règles particulières et essais pour les
transformateurs d'isolement à enroulements séparés à niveau d'isolement élevé et pour
les transformateurs d'isolement à enroulements séparés à tensions secondaires
supérieures à 1 000 V
Ta slovenski standard je istoveten z: prEN IEC 61558-2-10:2022
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
oSIST prEN IEC 61558-2-10:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 61558-2-10:2023
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oSIST prEN IEC 61558-2-10:2023
96/558/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61558-2-10 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-11-25 2023-02-17
SUPERSEDES DOCUMENTS:
96/545/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 22F,SC 34C,TC 51,TC
55,TC 61,SC 62A,TC 64,TC 66,TC 77,TC 85,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 2-10:
Particular requirements and tests for separating transformers with high insulation level and
separating transformers with output voltages exceeding 1 000 V
PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to
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.
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IEC CDV 61558-2-10 © IEC 2022 2 96/558/CDV
1 CONTENTS
2 FOREWORD. 3
3 INTRODUCTION . 5
4 1 Scope . 6
5 2 Normative references . 7
6 3 Terms and definitions . 7
7 4 General requirements . 8
8 5 General notes on tests . 8
9 6 Ratings . 8
10 7 Classification . 9
11 8 Marking and other information . 9
12 9 Protection against electric shock . 10
13 10 Change of input voltage setting . 11
14 11 Output voltage and output current under load . 11
15 12 No-load output voltage . 11
16 13 Short-circuit voltage . 12
17 14 Heating . 12
18 15 Short-circuit and overload protection . 12
19 16 Mechanical strength . 12
20 17 Protection against harmful ingress of dust, solid objects and moisture . 12
21 18 Insulation resistance, dielectric strength and leakage current . 12
22 19 Construction . 13
23 20 Components . 14
24 21 Internal wiring . 14
25 22 Supply connection and other external flexible cable or cords . 14
26 23 Terminals for external conductors . 15
27 24 Provisions for protective earthing . 15
28 25 Screws and connections . 15
29 26 Creepage distances, clearances and distances through insulation . 15
30 27 Resistance to heat, fire and tracking . 16
31 28 Resistance to rusting . 16
32 Annexes . 17
33 Bibliography . 18
34
35 Table 101 – Symbols indicating the kind of transformer . 10
36 Table 102 – Output voltage difference . 12
37 Table 103 – Table of dielectric strength test voltages for working voltages above
38 1 000 V . 13
39 Table 104 – Minimum clearances in air up to 2 000 m above sea level . 15
40 Table 105 – Minimum Creepage distances for basic or supplementary insulation . 16
41
42
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43 INTERNATIONAL ELECTROTECHNICAL COMMISSION
44 ____________
45
46 SAFETY OF TRANSFORMERS, REACTORS,
47 POWER SUPPLY UNITS AND COMBINATIONS THEREOF –
48
49 Part 2-10: Particular requirements and tests for separating
50 transformers with high insulation level and separating
51 transformers with output voltages exceeding 1 000 V
52
53
54 FOREWORD
55 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
56 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
57 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
58 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
59 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
60 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
61 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
62 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
63 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
64 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possibl e, an international
65 consensus of opinion on the relevant subjects since each technical committee has representation from all
66 interested IEC National Committees.
67 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
68 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
69 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
70 misinterpretation by any end user.
71 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
72 transparently to the maximum extent possible in their national and regional publications. Any divergence between
73 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
74 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
75 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
76 services carried out by independent certification bodies.
77 6) All users should ensure that they have the latest edition of this publication.
78 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
79 members of its technical committees and IEC National Committees for any personal injury, property damage or
80 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
81 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
82 Publications.
83 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
84 indispensable for the correct application of this publication.
85 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
86 rights. IEC shall not be held responsible for identifying any or all such patent rights.
87 International standard IEC 61558-2-10 has been prepared by IEC technical committee 96:
88 Transformers, reactors, power supply units and combinations thereof.
89 This second edition cancels and replaces the first edition published in 2014. This edition
90 constitutes a technical revision.
91 This edition includes the following significant technical changes with respect to the previous
92 edition:
93 a) Adjustment of structure and references in accordance with IEC 61558-1:2017
94 b) Overvoltage categories I, II, III and IV for clearances and dielectric strength tests are
95 included
96 c) Clearances for homogenous field conditions deleted
97
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98 The text of this International Standard is based on the following documents:
Draft Report on voting
96/XXX/FDIS 96/XXX/RVD
99
100 Full information on the voting for its approval can be found in the report on voting indicated in
101 the above table.
102 The language used for the development of this International Standard is English.
103 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
104 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
105 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
106 described in greater detail at www.iec.ch/standardsdev/publications.
107 It has the status of a group safety publication in accordance with IEC Guide 104.
108 This International Standard is to be used in conjunction with IEC 61558-1:2017.
109 This document supplements or modifies the corresponding clauses in IEC 61558-1:2017, so as
110 to convert that publication into the IEC standard: Particular requirements and tests for
111 separating transformers with high insulation level and separating transformers with output
112 voltages exceeding 1 000 V.
113 A list of all parts in the IEC 61558 series published under the general title Safety of transformers,
114 reactors, power supply units and combinations thereof, can be found on the IEC website.
115 Future standards in this series will carry the new general title as cited above. Titles of existing
116 standards in this series will be updated at the time of the next edition.
117 Where this document states "addition", "modification" or "replacement", the relevant text of
118 IEC 61558-1:2017 is to be adopted accordingly.
119 In this document, the following print types are used:
120 − requirements proper: in roman type;
121 − test specifications: in italic type;
122 − explanatory matter: in smaller roman type.
123 In the text of this document, the words in bold are defined in Clause 3.
124 Subclauses, notes, figures and tables additional to those in IEC 61558-1:2017 are numbered
125 starting from 101; supplementary annexes are entitled AA, BB, etc.
126 The committee has decided that the contents of this document will remain unchanged until the
127 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
128 the specific document. At this date, the document will be
129 • reconfirmed,
130 • withdrawn,
131 • replaced by a revised edition, or
132 • amended.
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133 INTRODUCTION
134 IEC TC 96 has a group safety function in accordance with IEC Guide 104 for transformers other
135 than those intended to supply distribution networks, in particular transformers and power supply
136 units intended to allow the application of protective measures against electric shock as defined
137 by TC 64, but in certain cases including the limitation of voltage and horizontal safety function
138 for SELV, in accordance with IEC 60364-4-41.
139 The group safety function (GSF) is used because of responsibility for safety extra-low voltage
140 (SELV) in accordance with IEC 61140:2016, 5.2.6 and IEC 60364-4-41:2017, 414.3.1 or control
141 circuits in accordance with IEC 60204-1:2016, 7.2.4.
142 The group safety function is used for each part of IEC 61558-2 because different standards of
143 the IEC 61558 series can be combined in one construction but in certain cases with no limitation
144 of rated output power.
145 For example an auto-transformer in accordance with IEC 61558-2-13 can be designed with a
146 separate SELV-circuit in accordance with the particular requirements for IEC 61558-2-6 relating
147 to the general requirements of IEC 61558-1.
148
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149 SAFETY OF TRANSFORMERS, REACTORS,
150 POWER SUPPLY UNITS AND COMBINATIONS THEREOF –
151
152 Part 2-10: Particular requirements and tests for separating
153 transformers with high insulation level and separating
154 transformers with output voltages exceeding 1 000 V
155
156
157 1 Scope
158 Replacement
159 This part of IEC 61558 deals with the safety of separating transformers with high insulation
160 level and separating transformers with output voltages exceeding 1 000 V. Transformers
161 incorporating electronic circuits are also covered by this document.
162 NOTE 1 Safety includes electrical, thermal and mechanical aspects.
163 Unless otherwise specified, from here onward, the term transformer covers separating
164 transformers with high insulation level and separating transformers with output voltages
165 exceeding 1 000 V AC or 1 500 V DC.
166 This document is applicable to stationary or portable, single-phase or polyphase, air-cooled
167 (natural or forced) independent or associated dry-type transformers. The windings can be
168 encapsulated or non-encapsulated.
169 For power supply units (linear) this document is applicable. For switch mode power supply
170 units, IEC 61558-2-16 is applicable together with this document. Where two requirements are
171 in conflict, the most severe take precedence.
172 The rated supply voltage does not exceed 1 000 V AC, and the rated supply frequency and
173 the internal operating frequencies do not exceed 500 Hz.
174 The rated output does not exceed:
175 − 25 kVA for single-phase transformers;
176 − 40 kVA for poly-phase transformers.
177 This document is applicable to transformers without limitation of the rated output subject to
178 an agreement between the purchaser and the manufacturer.
179 Where applicable the no-load output voltage or the rated output voltage:
180 − does not exceed 1 000 V AC or 1 500 V DC for separating transformers with high
181 insulation level;
182 − does exceed 1 000 V AC or 1 500 V DC and does not exceed 15 000 V AC or 15 000 V
183 DC for separating transformer with output voltage exceeding 1 000 V.
184 This document does not apply to:
185 − transformers covered by IEC 60076-11;
186 − neon transformers covered by IEC 61050 and
187 − power supplies and converters for use with or in products according to IEC 61347-2-
188 10.
189 This document is not applicable to external circuits and their components intended to be
190 connected to the input terminals and output terminals of the transformers.
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191 NOTE 2 Transformers covered by this document are used only in applications where double or reinforced
192 insulation between circuits is not required by the installation rules or by the end product standard .
193 NOTE 3 Normally, the transformers are intended to be used with equipment to provide voltages different from the
194 supply voltage for the functional requirements of the equipment. The protection against electric shock can be
195 provided (or completed) by other features of the equipment, such as the body. Parts of output circuits can be
196 connected to the input circuits or to protective earthing.
197 This document is applicable to transformers associated with specific equipment, to the extent
198 decided upon by the relevant IEC technical committees.
199 A
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