SIST EN 61558-2-13:2010
(Main)Safety of transformers, reactors, power supply units and similar products for voltages up to 1100 V -- Part 2-13: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers
- Abstract
IEC 61558-2-13:2009 deals with the safety of auto transformers for general applications and power supply units incorporating auto transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. This second edition cancels and replaces the first edition published in 1999. It constitutes a technical revision. The main changes consist of updating this part in accordance with Part 1 (2005), and increasing the supply voltages up to 1 100 V to be in line with the standards of TC 14. This part has the status of a group safety publication in accordance with IEC Guide 104. This part is intended to be used in conjunction with the latest edition of IEC 61558-1 and its amendments. It is based on the second edition (2005) of that standard. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication.
- Status
- Published
- Publication Date
- 14-Dec-2009
- Technical Committee
- I96 - Imaginarni 96
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 29-Oct-2009
- Due Date
- 03-Jan-2010
- Completion Date
- 15-Dec-2009
- 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)OJ Ref: C 348/03 OJ Date: 28-Nov-2013 Conflicting Date: 01-Mar-2012
2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limitsOJ Ref: C 249/03 OJ Date: 08-Jul-2016
SIST EN 61558-2-13:2010 is the Slovenian adoption of EN 61558-2-13:2009, published by SIST and based on IEC 61558-2-13:2009. It specifies safety requirements and tests for auto transformers and power supply units incorporating auto transformers for general applications, including transformers with electronic circuits, with supply voltages up to 1 100 V. In practice, it is the part of the EN 61558 series to use when the product is an auto-transformer-based unit rather than a separate-winding transformer.
What does SIST EN 61558-2-13:2010 specify?
SIST EN 61558-2-13:2010 gives particular requirements and tests for the safety of auto transformers and power supply units incorporating auto transformers. It supplements and modifies the general requirements in EN 61558-1 / IEC 61558-1, so the two parts are used together.
The scope covers stationary or portable, single-phase or polyphase, air-cooled dry-type transformers, with encapsulated or non-encapsulated windings. It also covers transformers incorporating electronic circuits. The document is intended for products used where the installation rules or end product standard do not require insulation between circuits.
The standard is organized into clauses 1 to 28, covering scope, references, terms, ratings, marking, electrical protection, construction, insulation, and mechanical and environmental resistance. It also includes annexes for creepage distances and related insulation coordination.
| Annex | What it covers |
|---|---|
| Annex C | Creepage distances, clearances and distances through insulation for material group II |
| Annex D | Creepage distances, clearances and distances through insulation for material group I |
| Annex R | Explanations for applying IEC 60664-1:2007 in relation to creepage and clearance values |
What are the key requirements of SIST EN 61558-2-13:2010?
SIST EN 61558-2-13:2010 sets rating limits, marking rules, output-voltage checks, and construction requirements that are specific to auto transformers. For manufacturers and test labs, the important point is that the product has to be identified, rated, and tested as an auto-transformer product, not just as a generic transformer.
Ratings and operating limits
Clause 6 limits the rated supply voltage to 1 100 V a.c. and the rated supply and internal operating frequencies to 500 Hz. It also sets limits for core power and rated output, with separate values for single-phase and polyphase transformers. In practice, this means the nameplate and the design both have to stay within the declared electrical envelope.
Clause 6 also limits the rated output voltage to 1 000 V a.c. or 1 415 V ripple-free d.c., and for independent transformers the output must be above 50 V a.c. or 120 V ripple-free d.c. The standard gives a formula linking core power and rated output, and it treats electrically connected separate windings differently. That matters when you calculate the transformer size and decide whether a design falls inside the part.
Marking and identification
Clause 8 requires the transformer to be marked with one of the graphical symbols for a fail-safe auto-transformer, a non-short-circuit proof auto-transformer, or a short-circuit proof auto-transformer. If there is a terminal for connection to the star point, the maximum current to the star point has to be marked. In practice, the marking tells users how the transformer behaves and how it may be connected.
No-load and loaded output
Clause 12 requires the no-load output voltage to be measured at rated supply voltage, rated frequency, and ambient temperature. For independent transformers, the no-load output has to stay within the stated upper and lower limits, and the difference between no-load output voltage and output voltage under load is limited by rating and transformer type in Table 101. This is the part that tells a test laboratory what to measure to check voltage regulation.
Construction and polarity safety
Clause 19.106 addresses plug-connected auto-transformers where the input voltage is higher than the output voltage. The output socket must not have a potential to earth higher than the rated output voltage, and the standard allows this to be achieved either by a polarised plug-and-socket system or by a polarity-detecting device. The practical effect is that a product may need a specific connector arrangement or a sensing-and-switching function to avoid unsafe output polarity.
Clause 19.111 requires protection against direct contact with live parts, including the contact path and drive. For design and inspection, this means exposed conductive paths and operating parts have to be checked for access to live parts.
Insulation coordination and clearances
Clause 18 modifies some of the insulation tests from Part 1, including parts of Tables 7 and 8a. Clause 26.101 and Annexes C, D and R allow values for creepage distance, clearance and distance through insulation above 1 000 V to be found by extrapolation. This matters because the standard extends to 1 100 V and the insulation design has to follow the higher-voltage conditions.
What terms does SIST EN 61558-2-13:2010 define?
- auto-transformer - a transformer in which the input and output windings have a common part.
- core power - the power that would be transformed by the core if it were used in a transformer with separate windings under the same voltage, frequency, power factor and thermal conditions.
- fail-safe auto-transformer - the auto-transformer category identified by symbol 60417-5941.
- non-short-circuit proof auto-transformer - the auto-transformer category identified by symbol 60417-5942.
- short-circuit proof auto-transformer - the auto-transformer category identified by symbol 60417-5943, either inherently or non-inherently.
- CTI - the index used in Annexes C and D to place insulating material into material group I or II for creepage and clearance values.
Who uses SIST EN 61558-2-13:2010?
SIST EN 61558-2-13:2010 is used by manufacturers, design engineers, and test laboratories working on auto transformers and power supply units incorporating auto transformers. It is also relevant to quality managers, certification bodies, and purchasers who need to specify or verify compliance for general-purpose transformer products.
In practice, users apply it when designing ratings, selecting markings, checking output voltage behavior, proving insulation distances, and running safety tests. It is especially relevant when the product uses an auto-transformer arrangement rather than isolated input and output windings.
What changed in SIST EN 61558-2-13:2010 from the previous edition?
SIST EN 61558-2-13:2010 replaces SIST EN 61558-2-13:2000 and EN 61558-2-13:2000. The document states that this is a technical revision.
The main changes stated for this edition are:
- updating the part in line with Part 1 / EN 61558-1:2005
- increasing the supply voltages up to 1 100 V
- aligning the scope with the standards of TC 14
Which standards are used with SIST EN 61558-2-13:2010?
SIST EN 61558-2-13:2010 is used together with EN 61558-1 / IEC 61558-1, which provides the general requirements and tests for the series. This part supplements and modifies Part 1, so Part 1 supplies the general framework and this document supplies the auto-transformer-specific rules.
IEC 61558-2-16 is named in the bibliography note for switch mode power supply units and transformers for switch mode power supply units. It is relevant when the product is a switch mode power supply unit rather than a linear power supply unit.
Annex R refers to IEC 60664-1:2007 for the application of creepage and clearance concepts. That matters for insulation coordination when working voltages are high.
What does the SIST EN 61558-2-13:2010 document contain?
The document contains the full clause structure for scope, references, terms, ratings, classification, marking, protection against electric shock, output voltage behavior, short-circuit voltage, heating, protection against overload, mechanical strength, ingress protection, insulation, construction, components, wiring, terminals, earthing, screws and connections, creepage distances, fire and tracking resistance, and rust resistance.
It also includes three figures showing winding arrangements and tappings, and one table for output voltage difference under load. Those items are used in design review and test planning because they show which winding arrangements are covered and how voltage regulation is assessed.
The annexes add the insulation-distance material groups and the explanatory material for applying IEC 60664-1:2007. In practice, these annexes are the parts used when a design has to be checked for clearance, creepage, and insulation distance at higher voltages.
Relations
- Effective Date
- 07-Jun-2022
- Official Journal Project Relation
SIST EN 61558-2-13:2000 - Safety of power transformers, power supply units and similar devices -- Part 2-13: Particular requirements for auto-transformers for general use - Effective Date
- 06-Apr-2010
- Effective Date
- 03-Feb-2026
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Frequently Asked Questions
SIST EN 61558-2-13:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Safety of transformers, reactors, power supply units and similar products for voltages up to 1100 V -- Part 2-13: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers". This standard covers: IEC 61558-2-13:2009 deals with the safety of auto transformers for general applications and power supply units incorporating auto transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. This second edition cancels and replaces the first edition published in 1999. It constitutes a technical revision. The main changes consist of updating this part in accordance with Part 1 (2005), and increasing the supply voltages up to 1 100 V to be in line with the standards of TC 14. This part has the status of a group safety publication in accordance with IEC Guide 104. This part is intended to be used in conjunction with the latest edition of IEC 61558-1 and its amendments. It is based on the second edition (2005) of that standard. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication.
IEC 61558-2-13:2009 deals with the safety of auto transformers for general applications and power supply units incorporating auto transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. This second edition cancels and replaces the first edition published in 1999. It constitutes a technical revision. The main changes consist of updating this part in accordance with Part 1 (2005), and increasing the supply voltages up to 1 100 V to be in line with the standards of TC 14. This part has the status of a group safety publication in accordance with IEC Guide 104. This part is intended to be used in conjunction with the latest edition of IEC 61558-1 and its amendments. It is based on the second edition (2005) of that standard. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication.
SIST EN 61558-2-13:2010 is classified under the following ICS (International Classification for Standards) categories: 29.180 - Transformers. Reactors. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 61558-2-13:2010 has the following relationships with other standards: It is inter standard links to SIST EN 61558-2-13:2000, SIST EN 61558-2-13:2000, SIST EN 61558-2-16:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 61558-2-13:2010 is associated with the following European legislation: EU Directives/Regulations: 2006/95/EC, 2014/35/EU. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 61558-2-13:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2010
1DGRPHãþD
SIST EN 61558-2-13:2000
Varnost transformatorjev, dušilk, napajalnikov in podobnih izdelkov za napajalne
napetosti do 1100 V - 2-13. del: Posebne zahteve in preskusi za
avtotransformatorje in napajalnike z avtotransformatorji (IEC 61558-2-13:2009)
Safety of transformers, reactors, power supply units and similar products for voltages up
to 1100 V -- Part 2-13: Particular requirements and tests for auto transformers and power
supply units incorporating auto transformers
Sicherheit von Transformatoren, Drosseln, Netzgeräten und dergleichen für
Versorgungsspannungen bis 1100 V - Teil 2-13: Besondere Anforderungen und
Prüfungen an Spartransformatoren und Netzgeräte die Spartransformatoren enthalten
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et produits
analogues pour des tensions d'alimentation jusqu'à 1 100 V -- Partie 2-13: Règles
particulières et essais pour les autotransformateurs et les blocs d'alimentation
incorporant des autotransformateurs
Ta slovenski standard je istoveten z: EN 61558-2-13:2009
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61558-2-13
NORME EUROPÉENNE
May 2009
EUROPÄISCHE NORM
ICS 29.180 Supersedes EN 61558-2-13:2000
English version
Safety of transformers, reactors, power supply units and similar products
for supply voltages up to 1 100 V -
Part 2-13: Particular requirements and tests for auto transformers
and power supply units incorporating auto transformers
(IEC 61558-2-13:2009)
Sécurité des transformateurs, bobines Sicherheit von Transformatoren, Drosseln,
d'inductance, blocs d'alimentation Netzgeräten und dergleichen
et produits analogues pour des tensions für Versorgungsspannungen bis 1 100 V -
d'alimentation jusqu'à 1 100 V - Teil 2-13: Besondere Anforderungen
Partie 2-13: Règles particulières et essais und Prüfungen an Spartransformatoren
pour les autotransformateurs et les blocs und Netzgeräte die Spartransformatoren
d'alimentation incorporant enthalten
des autotransformateurs (IEC 61558-2-13:2009)
(CEI 61558-2-13:2009)
This European Standard was approved by CENELEC on 2009-03-01. 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, Bulgaria, 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.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61558-2-13:2009 E
Foreword
The text of document 96/318/FDIS, future edition 2 of IEC 61558-2-13, prepared by IEC TC 96,
Transformers, reactors, power supply units and similar products for low voltage up to 1 100 V, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61558-2-13 on
2009-03-01.
This European Standard supersedes EN 61558-2-13:2000.
The main changes consist of updating this part in accordance with EN 61558-1:2005, and increasing the
supply voltages up to 1 100 V to be in line with the standards of TC 14.
This part is intended to be used in conjunction with the latest edition of EN 61558-1 and its amendments.
It is based on EN 61558-1:2005.
This part supplements or modifies the corresponding clauses in EN 61558-1, so as to convert that
publication into the European Standard: Particular requirements and tests for auto transformers and
power supply units incorporating auto transformers.
Where a particular subclause of Part 1 is not mentioned in this part, that subclause applies as far as is
reasonable. Where this part states "addition", "modification" or "replacement", the relevant text of Part 1 is
to be adapted accordingly.
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) 2009-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-03-01
In this part, 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 this part, the words in bold are defined in Clause 3.
Subclauses, notes, figures and tables additional to those in Part 1 are numbered starting from 101;
supplementary annexes are entitled AA, BB, etc.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61558-2-13:2009 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61558-2-16 NOTE Harmonized as EN 61558-2-16:200X (not modified).
__________
- 3 - EN 61558-2-13:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
Addition to Annex ZA of EN 61558-1:
Publication Year Title EN/HD Year
IEC 61558-1 2005 Safety of power transformers, EN 61558-1 2005
power supplies, reactors + corr. August 2006
and similar products -
Part 1: General requirements and tests
IEC 61558-2-13 ®
Edition 2.0 2009-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety of transformers, reactors, power supply units and similar products for
supply voltages up to 1 100 V –
Part 2-13: Particular requirements and tests for auto transformers and power
supply units incorporating auto transformers
Sécurité des transformateurs, bobines d’inductance, blocs d'alimentation et
produits analogues pour des tensions d’alimentation jusqu'à 1 100 V –
Partie 2-13: Règles particulières et essais pour les autotransformateurs et les
blocs d'alimentation incorporant des autotransformateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 29.180 ISBN 2-8318-1028-6
– 2 – 61558-2-13 © IEC:2009
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .7
3 Terms and definitions .7
4 General requirements .8
5 General notes on tests .8
6 Ratings.8
7 Classification.9
8 Marking and other information .9
9 Protection against electric shock .10
10 Change of input voltage setting .10
11 Output voltage and output current under load .10
12 No-load output voltage .10
13 Short-circuit voltage .11
14 Heating .11
15 Short-circuit and overload protection .11
16 Mechanical strength .11
17 Protection against harmful ingress of dust, solid objects and moisture.11
18 Insulation resistance, dielectric strength and leakage current .11
19 Construction .12
20 Components .12
21 Internal wiring.13
22 Supply connection and other external flexible cable or cords .13
23 Terminals for external conductors.13
24 Provisions for protective earthing .13
25 Screws and connections .13
26 Creepage distances, clearances and distances through insulation.13
27 Resistance to heat, fire and tracking.13
28 Resistance to rusting.13
Annexes .14
Annex C Creepage distances (cr), clearances (cl) and distances through insulation
(dti) Material group II (400 ≤CTI <600) .14
Annex D Creepage distances (cr), clearances (cl) and distances through insulation
(dti) Material group I (CTI ≥600) .14
Annex R Explanations of the application of 4.2 of IEC 60664-1:2007 (see IEC 61558-1
Subclause 26.2).14
Bibliography.15
Figure 101 – Windings .
Figure 102 – Tappings .8
Figure 103 – Windings separated by functional isolation .8
61558-2-13 © IEC:2009 – 3 –
Table 101 – Output voltage difference .11
– 4 – 61558-2-13 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS
AND SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1 100 V –
Part 2-13: Particular requirements and tests
for auto transformers and power supply units
incorporating auto transformers
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
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agreement between the two organizations.
2) The formal decisions or agreements of 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
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indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International standard IEC 61558-2-13 has been prepared by IEC technical committee 96:
Transformers, reactors, power supply units and similar products for low voltages up to
1 100 V.
This second edition cancels and replaces the first edition published in 1999. It constitutes a
technical revision. The main changes consist of updating this part in accordance with Part 1
(2005), and increasing the supply voltages up to 1 100 V to be in line with the standards of TC
14.
This part has the status of a group safety publication in accordance with IEC Guide 104:
(1997): The preparation of safety publications and the use of basic safety publications and
group safety publications.
61558-2-13 © IEC:2009 – 5 –
The text of this standard is based on the followin
...