Safety of transformers, reactors, power supply units and combinations thereof - Part 2-20: Particular requirements and tests for small reactors (IEC 61558-2-20:2010)

Replacement:
This part of IEC 61558 deals with the safety of small reactors for general applications.
NOTE 1 Safety includes electrical, thermal and mechanical aspects.
Unless otherwise specified, from here onward, the term transformer or reactor covers small
reactors.
This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural
or forced) general purpose reactors including alternating current, premagnetised and current
compensated independent or associated reactors.
The rated supply voltage does not exceed 1 000 V a.c. or 1 500V ripple-free d.c., the rated supply frequency and the internal operational frequencies do not exceed 1 MHz.
The rated power does not exceed:
– 25 kVAR a.c. (25 kW d.c.) for single-phase reactors,
– 50 kVAR a.c. (50 kW d.c.) for poly-phase reactors.
This part is applicable to reactors without limitations of the rated power subject to an agreement between the purchaser and the manufacturer.
This part is applicable to dry-type reactors. The windings may be encapsulated or nonencapsulated.
This part does not apply to:
– reactors covered by IEC 60289;
– ballast for tubular fluorescent covered by IEC 61347-2-8;
– ballast for discharge lamps (excluding tubular fluorescent lamps) covered by IEC 61347-2-9.
NOTE 2 For reactors filled with liquid dielectric or pulverised material such as sand, additional requirements are under consideration.
NOTE 3 Attention is drawn to the following:
- for reactors intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary;
- measures to protect the enclosure and the components inside the enclosure against external influences such as fungus, vermin, termites, solar-radiation, and icing should also be considered;
- the different conditions for transportation, storage, and operation of the reactor should also be considered;
- additional requirements in accordance with other appropriate standards and national rules may be applicable to reactors intended for use in special environments, such as tropical environment.
NOTE 4 Normally, reactors are intended to be associated with equipment for functional requirements of the equipment or requirements by the installation rules or by other appliance specifications.
NOTE 5 Reactors incorporating electronic circuits and components are also covered by this standard.
NOTE 6 The protection against electric shock may be provided (or completed) by other parts or features of the equipment, such as the body.
NOTE 7 Reactors for particular applications will in the future be covered by complementary normative annexes.
NOTE 8 Future technological development of reactors may necessitate a need to increase the upper limit of the frequencies, until then this part may be used as a guidance document.

Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechende Kombinationen - Teil 2-20: Besondere Anforderungen und Prüfungen an Kleindrosseln (IEC 61558-2-20:2010)

Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et combinaisons de ces éléments - Partie 2-20: Règles particulières et essais pour les petites bobines d'inductance (CEI 61558-2-20:2010)

La CEI 61558-2-20:2010 traite de la sécurité des petites bobines d'inductance pour applications d'ordre général. La présente partie est applicable aux bobines d'inductance fixes ou mobiles, monophasées ou polyphasées, à refroidissement par air (circulation naturelle ou forcée), pour usage général, incluant les bobines d'inductance à courant alternatif, prémagnétisées et à courant compensé, indépendantes ou associées. Cette deuxième édition annule et remplace la première édition publiée en 2000. Elle constitue une révision technique. Les principales modifications consistent en la mise à jour de la présente partie conformément à la CEI 61558-1:2005. La présente partie a le statut de publication groupée de sécurité conformément au Guide CEI 104. L'attention des Comités Nationaux est attirée sur le fait que les fabricants d'appareils et les organismes d'essai peuvent avoir besoin d'une période transitoire après la publication d'une nouvelle publication CEI, ou d'une publication amendée ou révisée, pour fabriquer des produits conformes aux nouvelles exigences et pour adapter leurs équipements aux nouveaux essais ou aux essais révisés. Le comité recommande que le contenu de cette publication soit entériné au niveau national au plus tôt 12 mois après la date de publication.

Varnost transformatorjev, dušilk, napajalnikov in podobnih izdelkov - 2-20. del: Posebne zahteve in preskusi za majhne reaktorje (IEC 61558-2-20:2010)

Nadomestilo:
ta del IEC 61558 obravnava varnost majhnih reaktorjev za splošne uporabe.
OPOMBA 1: Varnost vključuje električne, toplotne in mehanske vidike.
Razen če je drugače določeno, od tu naprej pojem transformator ali reaktor zajema majhne
reaktorje.
Ta del velja za fiksne ali prenosne, enofazne ali večfazne, zračno hlajene (naravno
ali vsiljeno) reaktorje za splošne namene, vključno z reaktorji z izmeničnim tokom, vnaprej namagnetene in tokovno
kompenzirane neodvisne ali povezane reaktorje.
Ocenjena napetost napajanja ne presega 1.000 V izmeničnega toka ali 1 500 V enosmernega toka brez nihanja, ocenjena frekvenca napajanja in notranja obratovalna frekvenca pa ne presegata 1 MHz.
Ocenjena moč ne presega:
– 25 kVAR izmeničnega toka (25 kW enosmernega toka) za enofazne reaktorje,
– 50 kVAR izmeničnega toka (50 kW enosmernega toka) za večfazne reaktorje.
Ta del velja za reaktorje brez omejitve ocenjene moči, ki je predmet dogovora med kupcem in proizvajalcem.
Ta del velja za reaktorje suhega tipa. Navitje je lahko inkapsulirano ali nekapsulirano.
Ta del ne velja za:
– reaktorje, ki jih zajema IEC 60289,
– balast za fluorescenčne cevi, ki jih zajema IEC 61347-2-8,
– balast za sijalke (razen svetil s fluorescenčnimi cevmi), zajete v IEC 61347-2-9.
OPOMBA 2: Za reaktorje, polnjene s tekočim dielektrikom ali mletim materialom, kot je na primer pesek, se obravnavajo dodatne zahteve.
OPOMBA 3: Upoštevati je treba naslednje:
– za reaktorje, namenjene uporabi v vozilih, na krovih ladij in v zračnih plovilih, so lahko potrebne dodatne zahteve (iz drugih standardov, ki veljajo, državnih pravil itd.),
– meritve za zaščito ohišij in komponent v ohišjih pred zunanjimi vplivi, kot so plesen, mrčes, termiti, sončno sevanje in led, je prav tako treba upoštevati,
– različne pogoje za transport, hranjenje in delovanje reaktorja, je prav tako treba upoštevati,
– dodatne zahteve v skladu z drugimi primernimi standardi in državnimi pravili lahko veljajo za reaktorje, namenjene uporabi v posebnih okoljih, kot je tropsko okolje.
OPOMBA 4: Običajno so reaktorji namenjeni združevanju z opremo za funkcionalne zahteve opreme ali z zahtevami inštalacijskih pravil ali drugih specifikacij naprave.
OPOMBA 5: Reaktorji, ki vsebujejo elektronska vezja in komponente, so prav tako zajeti v tem standardu.
OPOMBA 6: Zaščita pred električnim udarom je lahko zagotovljena (ali dopolnjena) z drugimi deli ali značilnostmi opreme, kot je na primer ohišje.
OPOMBA 7: Reaktorji za nekatere uporabe bodo v prihodnosti zajeti v komplementarnih normativnih dodatkih.
OPOMBA 8: Prihodnji tehnološki razvoj reaktorjev je lahko potreben zaradi dviga zgornje meje frekvenc, do takrat pa se lahko ta del uporablja kot dokument s smernicami.

General Information

Status
Published
Publication Date
08-Mar-2011
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Mar-2011
Due Date
07-May-2011
Completion Date
09-Mar-2011

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SLOVENSKI STANDARD
SIST EN 61558-2-20:2011
01-april-2011
1DGRPHãþD
SIST EN 61558-2-20:2001
Varnost transformatorjev, dušilk, napajalnikov in podobnih izdelkov - 2-20. del:
Posebne zahteve in preskusi za majhne reaktorje (IEC 61558-2-20:2010)

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-

20: Particular requirements and tests for small reactors (IEC 61558-2-20:2010)
Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechende

Kombinationen - Teil 2-20: Besondere Anforderungen und Prüfungen an Kleindrosseln

(IEC 61558-2-20:2010)
Sécurité des transformateurs, bobines d'inductance, blocs d'alimentation et

combinaisons de ces éléments - Partie 2-20: Règles particulières et essais pour les

petites bobines d'inductance (CEI 61558-2-20:2010)
Ta slovenski standard je istoveten z: EN 61558-2-20:2011
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
SIST EN 61558-2-20:2011 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 61558-2-20:2011
---------------------- Page: 2 ----------------------
SIST EN 61558-2-20:2011
EUROPEAN STANDARD
EN 61558-2-20
NORME EUROPÉENNE
February 2011
EUROPÄISCHE NORM
ICS 29.180 Supersedes EN 61558-2-20:2000
English version
Safety of transformers, reactors, power supply units and combinations
thereof -
Part 2-20: Particular requirements and tests for small reactors
(IEC 61558-2-20:2010)
Sécurité des transformateurs, bobines Sicherheit von Transformatoren, Drosseln,
d'inductance, blocs d'alimentation et Netzgeräten und entsprechende
combinaisons de ces éléments - Kombinationen -

Partie 2-20: Règles particulières et essais Teil 2-20: Besondere Anforderungen und

pour les petites bobines d'inductance Prüfungen an Kleindrosseln
(CEI 61558-2-20:2010) (IEC 61558-2-20:2010)

This European Standard was approved by CENELEC on 2011-01-02. 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, Croatia, 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
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61558-2-20:2011 E
---------------------- Page: 3 ----------------------
SIST EN 61558-2-20:2011
EN 61558-2-20:2011 - 2 -
Foreword

The text of document 96/356/FDIS, future edition 2 of IEC 61558-2-20, prepared by IEC TC 96,

Transformers, reactors, power supply units, and combinations thereof, was submitted to the

IEC-CENELEC parallel vote and was approved by CENELEC as EN 61558-2-20 on 2011-01-02.

This European Standard supersedes EN 61558-2-20:2000.

The main changes consist of updating this part in accordance with EN 61558-1:2005.

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.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent

rights.
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) 2011-10-02
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-02

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 small reactors.

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.
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.
__________
---------------------- Page: 4 ----------------------
SIST EN 61558-2-20:2011
- 3 - EN 61558-2-20:2011
Endorsement notice

The text of the International Standard IEC 61558-2-20:2010 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60289:1988 NOTE Harmonized as EN 60289:1994 (modified).
IEC 61347-2-8:2000 NOTE Harmonized as EN 61347-2-8:2001 (not modified).
IEC 61347-2-9:2000 NOTE Harmonized as EN 61347-2-9:2001 (not modified).
IEC 61558-2-16:2009 NOTE Harmonized as EN 61558-2-16:2009 (not modified).
__________
---------------------- Page: 5 ----------------------
SIST EN 61558-2-20:2011
EN 61558-2-20:2011 - 4 -
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Annex ZA of Part 1 is applicable except as follows:
Addition:
Publication Year Title EN/HD Year
IEC 61558-1 2005 Safety of power transformers, power supplies, EN 61558-1 2005
reactors and similar products - + corr. August 2006
Part 1: General requirements and tests
---------------------- Page: 6 ----------------------
SIST EN 61558-2-20:2011
IEC 61558-2-20
Edition 2.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety of transformers, reactors, power supply units and combinations thereof –
Part 2-20: Particular requirements and tests for small reactors
Sécurité des transformateurs, bobines d’inductance, blocs d’alimentation et des
combinaisons de ces éléments –

Partie 2-20: Règles particulières et essais pour les petites bobines d'inductance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 29.180 ISBN 978-2-88912-038-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 61558-2-20:2011
– 2 – 61558-2-20 © IEC:2010
CONTENTS

FOREWORD...........................................................................................................................3

1 Scope...............................................................................................................................5

2 Normative references........................................................................................................6

3 Terms and definitions .......................................................................................................6

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.....................................................................................11

10 Change of input voltage setting .......................................................................................11

11 Output voltage and output current under load ..................................................................11

12 No-load output voltage....................................................................................................12

13 Short-circuit voltage........................................................................................................12

14 Heating...........................................................................................................................12

15 Short-circuit and overload protection ...............................................................................12

16 Mechanical strength........................................................................................................14

17 Protection against harmful ingress of dust, solid objects and moisture.............................14

18 Insulation resistance, dielectric strength and leakage current ..........................................14

19 Construction ...................................................................................................................14

20 Components ...................................................................................................................14

21 Internal wiring .................................................................................................................15

22 Supply connection and other external flexible cables or cords..........................................15

23 Terminals for external conductors ...................................................................................15

24 Provision for protective earthing......................................................................................15

25 Screws and connections .................................................................................................15

26 Creepage distances, clearances and distances through insulation ...................................15

27 Resistance to heat, fire and tracking ...............................................................................15

28 Resistance to rusting ......................................................................................................16

Annexes................................................................................................................................17

Bibliography ..........................................................................................................................17

---------------------- Page: 8 ----------------------
SIST EN 61558-2-20:2011
61558-2-20 © IEC:2010 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –
Part 2-20: Particular requirements and tests for small reactors
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,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). 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. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

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

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

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 61558-2-20 has been prepared by IEC technical committee 96:

Transformers, reactors, power supply units and combinations thereof.

This second edition cancels and replaces the first edition published in 2000. It constitutes a

technical revision. The main changes consist of updating this part in accordance with

IEC 61558-1:2005.

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.
---------------------- Page: 9 ----------------------
SIST EN 61558-2-20:2011
– 4 – 61558-2-20 © IEC:2010
The text of this standard is based on the following documents:
FDIS Report on voting
96/356/FDIS 96/363/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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.

This part supplements or modifies the corresponding clauses in IEC 61558-1, so as to convert

that publication into the IEC standard: Particular requirements and tests for small reactors.

A list of all parts of the IEC 61558 series, under the general title: Safety of transformers,

reactors, power supply units and combinations thereof, can be found on the IEC website.

Future standards in this series will carry the new general title as cited above. Titles of existing

standards in this series will be updated at the time of the next edition.

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.
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.

The committee has decided that the contents of this publication will remain unchanged until the

stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to

the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing

organizations may need a transitional period following publication of a new, amended or revised IEC publication in

which to make products in accordance with the new requirements and to equip themselves for conducting new or

revised tests.

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.
---------------------- Page: 10 ----------------------
SIST EN 61558-2-20:2011
61558-2-20 © IEC:2010 – 5 –
SAFETY OF TRANSFORMERS, REACTORS,
POWER SUPPLY UNITS AND COMBINATIONS THEREOF –
Part 2-20: Particular requirements and tests for small reactors
1 Scope
Replacement:

This part of IEC 61558 deals with the safety of small reactors for general applications.

NOTE 1 Safety includes electrical, thermal and mechanical aspects.

Unless otherwise specified, from here onward, the term transformer or reactor covers small

reactors.

This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural

or forced) general purpose reactors including alternating current, premagnetised and current

compensated independent or associated reactors.

The rated supply voltage does not exceed 1 000 V a.c. or 1 500V ripple-free d.c., the rated

supply frequency and the internal operational frequencies do not exceed 1 MHz.
The rated power does not exceed:
– 25 kVAR a.c. (25 kW d.c.) for single-phase reactors,
– 50 kVAR a.c. (50 kW d.c.) for poly-phase reactors.

This part is applicable to reactors without limitations of the rated power subject to an

agreement between the purchaser and the manufacturer.

This part is applicable to dry-type reactors. The windings may be encapsulated or non-

encapsulated.
This part does not apply to:
– reactors covered by IEC 60289;
– ballast for tubular fluorescent covered by IEC 61347-2-8;
– ballast for discharge lamps (excluding tubular fluorescent lamps) covered by
IEC 61347-2-9.

NOTE 2 For reactors filled with liquid dielectric or pulverised material such as sand, additional requirements are

under consideration.
NOTE 3 Attention is drawn to the following:

- for reactors intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other

applicable standards, national rules, etc.) may be necessary;

- measures to protect the enclosure and the components inside the enclosure against external influences such

as fungus, vermin, termites, solar-radiation, and icing should also be considered;

- the different conditions for transportation, storage, and operation of the reactor should also be considered;

---------------------- Page: 11 ----------------------
SIST EN 61558-2-20:2011
– 6 – 61558-2-20 © IEC:2010

- additional requirements in accordance with other appropriate standards and national rules may be applicable to

reactors intended for use in special environments, such as tropical environment.

NOT E 4 Norm al l y , reactors are intended to be associated with equipment for functional requirements of the

equipment or requirements by the installation
...

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