1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSafety of transformers, reactors, power supply units and combinations thereofPart 2-20: Particular requirements and tests for small reactorsBS EN 61558-2-20:2011National foreword
2、This British Standard is the UK implementation of EN 61558-2-20:2011. It is identical to IEC 61558-2-20:2010. It supersedes BS EN 61558-2-20:2001 which will be withdrawn on 2 January 2014.The UK participation in its preparation was entrusted to Technical Committee PEL/96, Small transformers.A list o
3、f organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011ISBN 978 0 580 64547 1 ICS 29.180Compliance with a British Sta
4、ndard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2011.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61558-2-20:2011EUROPEAN STANDARD EN 61558-2-
5、20 NORME EUROPENNE EUROPISCHE NORM February 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploi
6、tation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61558-2-20:2011 E ICS 29.180 Supersedes EN 61558-2-20:2000English version Safety of transformers, reactors, power supply units and combinations thereof - Part 2-20: Particular requirements and tests for small rea
7、ctors (IEC 61558-2-20:2010) Scurit des transformateurs, bobines dinductance, blocs dalimentation et combinaisons de ces lments - Partie 2-20: Rgles particulires et essais pour les petites bobines dinductance (CEI 61558-2-20:2010) Sicherheit von Transformatoren, Drosseln, Netzgerten und entsprechende
8、 Kombinationen - Teil 2-20: Besondere Anforderungen und Prfungen an Kleindrosseln (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
9、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,
10、 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, Belg
11、ium, 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. B
12、S EN 61558-2-20:2011EN 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 61
13、558-2-20 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 th
14、e 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 wer
15、e 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
16、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. Wher
17、e 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: requiremen
18、ts 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
19、 entitled AA, BB, etc. Annex ZA has been added by CENELEC. _ BS 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,
20、 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 Harm
21、onized as EN 61558-2-16:2009 (not modified). _ BS EN 61558-2-20:2011EN 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 documen
22、t. 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 Z
23、A 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, reactors and similar products - Part 1: General requirements and tests EN 61558-1 + corr. August 2005 2006 BS EN 61558-2-20:2011 2 61558-2-20 IEC:20
24、10 CONTENTS 1 Scope.5 2 Normative references6 3 Terms and definitions .6 4 General requirements .8 5 General notes on tests8 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 cur
25、rent under load 11 12 No-load output voltage12 13 Short-circuit voltage12 14 Heating.12 15 Short-circuit and overload protection .12 16 Mechanical strength14 17 Protection against harmful ingress of dust, solid objects and moisture.14 18 Insulation resistance, dielectric strength and leakage current
26、 14 19 Construction .14 20 Components .14 21 Internal wiring.15 22 Supply connection and other external flexible cables or cords15 23 Terminals for external conductors .15 24 Provision for protective earthing15 25 Screws and connections .15 26 Creepage distances, clearances and distances through ins
27、ulation .15 27 Resistance to heat, fire and tracking .15 28 Resistance to rusting 16 Annexes17 Bibliography17 BS EN 61558-2-20:201161558-2-20 IEC:2010 5 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATIONS THEREOF Part 2-20: Particular requirements and tests for small reactors 1 Sco
28、pe 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
29、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 ra
30、ted 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 subje
31、ct 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 dischar
32、ge 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,
33、 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
34、 also be considered; - the different conditions for transportation, storage, and operation of the reactor should also be considered; BS 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 i
35、ntended 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 ele
36、ctronic 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 nor
37、mative 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. 2 Normative references This clause of Part 1 is applicable except as follows: Addition: IEC 61558-1:2005
38、, Safety of power transformers, power supplies, reactors and similar products Part 1: General requirements and tests 3 Terms and definitions This clause of Part 1 is applicable, except as follows: Modification: Where Part 1 is applicable, the word “transformer“, if used, shall be replaced by “reacto
39、r“. Addition: 3.1.101 reactor arrangement comprising one or more windings with an impedance depending on the frequency, working in accordance with the principle of self-induction whereby a magnetising current generates a magnetic field through a magnetically effective core or through air NOTE Reacto
40、rs with toroidal core are also included in this definition. 3.1.102 alternating current reactor reactor in which the magnetising current generates an alternating magnetic field, changing its polarity depending on the frequency 3.1.103 premagnetised reactor reactor in which the magnetising direct cur
41、rent generates a magnetic field of only one polarity, while a superimposed alternating current alters the direct magnetic field depending on its strength and the frequency 3.1.104 current compensated reactor reactor with at least two windings on a common core, where the magnetising currents are in o
42、pposite directions in order to reduce the magnetic flux BS EN 61558-2-20:201161558-2-20 IEC:2010 7 3.1.105 overload proof reactor reactor in which the temperature does not exceed the specified limits when the reactor is overloaded and continues to meet all requirements of this standard after the rem
43、oval of the overload 3.1.105.1 non-inherently overload proof reactor overload proof reactor equipped with a protective device which opens the circuit, or reduces the current in the circuit when the reactor is overloaded, and which continues to meet all requirements of this standard after the removal
44、 of the overload and resetting or replacing of the protective device NOTE 1 Examples of protective devices are fuses, overload releases, thermal fuses, thermal links, thermal cut-outs, PTC resistors, and automatic circuit-breakers. NOTE 2 In case of protection by a device which cannot be replaced no
45、r re-set, the wording “continues to meet all requirements of this standard after removal of the overload“ does not imply that the reactor continues to operate. 3.1.105.2 inherently overload proof reactor overload proof reactor not equipped with a device to protect the reactor and in which the temper
46、ature in the case of overload, by construction, does not exceed the specified limits and which continues to operate and meet all the requirements of this standard after the removal of the overload 3.1.106 non-overload proof reactor reactor which is intended to be protected against excessive temperat
47、ure by means of a protective device not provided with the reactor and which continues to meet all the requirements of this standard after the removal of the overload and resetting or replacing of the protective device 3.1.107 fail-safe reactor reactor which, after abnormal use, permanently fails to
48、function by an interruption of the failing circuit but presents no danger to the user or surroundings 3.4 Circuits and windings This subclause of Part 1 is not applicable. 3.5 Ratings This subclause of Part 1 is applicable, except as follows: Replacement: 3.5.4 rated current rated current, assigned
49、to the reactor by the manufacturer including harmonics, if any, which influence the heating of the reactor Addition: 3.5.101 rated power sum of the products of the rated voltage drop and the rated current at the rated frequency for the different windings BS EN 61558-2-20:2011 8 61558-2-20 IEC:2010 3.5.102 rated inductance inductance of the reactor designed by the manufacturer for the specified operating condition of the reactor NOTE The specific operating conditions of d.c. reactor
