1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSafety of transformers, reactors,power supply units and similarproducts for supply voltages upto 1 100 V Part 2-6: Particular requirements and tests for safety isolating transfor
2、mers and power supply units incorporating safety isolating transformersBS EN 61558-2-6:2009National forewordThis British Standard is the UK implementation of EN 61558-2-6:2009. It isidentical to IEC 61558-2-6:2009. It supersedes BS EN 61558-2-6:1998 whichis withdrawn.The UK participation in its prep
3、aration was entrusted to Technical CommitteePEL/96, Small transformers.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct applic
4、ation. BSI 2010ISBN 978 0 580 57894 6ICS 29.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 January 2010Amendments issued since publicationAmd. No. Date Text
5、 affectedBRITISH STANDARDBS EN 61558-2-6:2009EUROPEAN STANDARD EN 61558-2-6 NORME EUROPENNE EUROPISCHE NORM August 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat
6、: 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 61558-2-6:2009 E ICS 29.180 Supersedes EN 61558-2-6:1997English version Safety of transformers, reactors, power supply units and similar pr
7、oducts for supply voltages up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers (IEC 61558-2-6:2009) Scurit des transformateurs, bobines dinductance, blocs dalimentation et produits analogues
8、pour des tensions dalimentation jusqu 1 100 V - Partie 2-6: Rgles particulires et essais pour les transformateurs de scurit et les blocs dalimentation incorporant des transformateurs de scurit (CEI 61558-2-6:2009) Sicherheit von Transformatoren, Drosseln, Netzgerten und dergleichen fr Versorgungsspa
9、nnungen bis 1 100 V - Teil 2-6: Besondere Anforderungen und Prfungen an Sicherheitstransformatoren und Netzgerte, die Sicherheitstransformatoren enthalten (IEC 61558-2-6:2009) This European Standard was approved by CENELEC on 2009-07-01. CENELEC members are bound to comply with the CEN/CENELEC Inter
10、nal 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 me
11、mber. 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. CENEL
12、EC 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,
13、 Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61558-2-6:2009EN 61558-2-6:2009 2 Foreword The text of document 96/317/FDIS, future edition 2 of IEC 61558-2-6, prepared by IEC TC 96, Transformers, reactors, power supply units and similar products for low voltage up to 1 100 V, wa
14、s submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61558-2-6 on 2009-07-01. This European Standard supersedes EN 61558-2-6:1997. The main changes consist of updating EN 61558-2-6:1997, in accordance with EN 61558-1:2005, and increasing the supply voltages up to 1 100 V to
15、 be in line with the standards of TC 14. 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) 2009-10-01 latest date by which the national standards conflicting with the EN have to
16、 be withdrawn (dow) 2012-07-01 This standard is to be used in conjunction with EN 61558-1 and its amendments. It is based on EN 61558-1:2005. This Part 2-6 supplements or modifies the corresponding clauses in EN 61558-1, so as to convert that publication into the European Standard: Particular requir
17、ements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers. When a particular subclause of Part 1 is not mentioned in this part, that subclause applies as far as is reasonable. Where this standard states “addition“, “modification“ or “replac
18、ement“, 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 standard, the words in bold are defined in Claus
19、e 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 61558-2-6:2009 was approved by CENELEC as a Eur
20、opean 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). _ BS EN 61558-2-6:2009 3 EN 61558-2-6:2009 Annex ZA (normative) Normative references
21、 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, power supplies, reactors and similar products - Part 1: General requirements and tests EN 61558-1 + corr.
22、 August 2005 2006 BS EN 61558-2-6:2009 2 61558-2-6 IEC:2009 CONTENTS 1 Scope.5 2 Normative references .6 3 Terms and definitions .6 4 General requirements.6 5 General notes on tests .6 6 Ratings.6 7 Classification7 8 Marking and other information 7 9 Protection against electric shock 7 10 Change of
23、input voltage setting 7 11 Output voltage and output current under load .7 12 No-load output voltage .7 13 Short-circuit voltage .8 14 Heating 8 15 Short-circuit and overload protection 8 16 Mechanical strength .9 17 Protection against harmful ingress of dust, solid objects and moisture9 18 Insulati
24、on resistance, dielectric strength and leakage current .9 19 Construction.9 20 Components .11 21 Internal wiring.11 22 Supply connection and other external flexible cable or cords 11 23 Terminals for external conductors.11 24 Provisions for protective earthing .11 25 Screws and connections.11 26 Cre
25、epage distances, clearances and distances through insulation12 27 Resistance to heat, fire and tracking.12 28 Resistance to rusting12 Annexes .13 Annex C Creepage distances (cr), clearances (cl) and distances through insulation (dti) Material group II (400 CTI 600) 13 Annex D Creepage distances (cr)
26、, clearances (cl) and distances through insulation (dti) Material group I (CTI 600)13 Annex R Explanations of the application of 4.2 of IEC 60664-1:2007 (see IEC 61558-1 Subclause 26.2)13 Bibliography14 Table 101 Output voltage difference 8 BS EN 61558-2-6:200961558-2-6 IEC:2009 5 SAFETY OF TRANSFOR
27、MERS, REACTORS, POWER SUPPLY UNITS AND SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1 100 V Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers 1 Scope Replacement: This part of IEC 61558 deals with the safety
28、 of safety isolating transformers for general applications and power supply units incorporating safety isolating transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. NOTE 1 Safety includes electrical, thermal and mechanical aspects.
29、 Unless otherwise specified, from here onward, the term transformer covers safety isolating transformers for general applications and power supply units incorporating safety isolating transformers for general applications. NOTE 2 For power supply units (linear) this part is applicable. For switch mo
30、de power supply units, IEC 61558-2-16 is applicable together with this part. This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry- type transformers. The windings may be encapsulated or non-encapsulated. The rated
31、supply voltage does not exceed 1 100 V a.c., and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz. The rated output does not exceed: 10 kVA for single-phase transformers; 16 kVA for polyphase transformers. This part is applicable to transformers without limitati
32、on of the rated output subject to an agreement between the purchaser and the manufacturer. NOTE 3 Transformers intended to supply distribution networks are not included in the scope. The no-load output voltage or the rated output voltage does not exceed 50 V a.c. or 120 V ripple-free d.c. This part
33、is not applicable to external circuits and their components intended to be connected to the input terminals and output terminals of the transformers. Transformers covered by this part are used in applications where double or reinforced insulation between circuits is required by the installation rule
34、s or by the end product standard. NOTE 4 Attention is drawn to the following: for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary; BS EN 61558-2-6:2009 6 61558-2-6 IEC:2009 me
35、asures 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 transformers should also be considere
36、d; additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments. NOTE 5 Future technological development of transformers may necessitate a need to increase the upper limit of the frequencies, unti
37、l 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, Safety of power transformers, power supplies, reactors and similar products Part 1: General requirements and tests 3 Terms and definitions T
38、his clause of Part 1 is applicable. 4 General requirements This clause of Part 1 is applicable. 5 General notes on tests This clause of Part 1 is applicable. 6 Ratings This clause of Part 1 is applicable except as follows. Addition: 6.101 The rated output voltage shall not exceed 50 V a.c. or 120 V
39、ripple-free d.c. 6.102 The rated output shall not exceed: 10 kVA for single-phase transformers; 16 kVA for polyphase transformers. Transformers without limitation of the rated output shall be subject to agreement between the purchaser and the manufacturer. 6.103 The rated supply frequency and the in
40、ternal operating frequencies shall not exceed 500 Hz. 6.104 The rated supply voltage shall not exceed 1 100 V a.c. Compliance with the requirements of 6.101 to 6.104 is checked by inspection of the marking. BS EN 61558-2-6:200961558-2-6 IEC:2009 7 7 Classification This clause of Part 1 is applicable
41、. 8 Marking and other information This clause of Part 1 is applicable except as follows: 8.1 h) Replacement: Replace the first sentence by the following: Relevant graphical symbols shown in 8.11 indicating the kind of transformer; 8.11 Addition: Symbol or graphical symbol Explanation or title Identi
42、fication FFail-safe safety isolating transformer 60417-5222 Non-short-circuit-proof safety isolating transformer 60417-5946 Short-circuit-proof safety isolating transformer(inherently or non-inherently) 60417-5947 9 Protection against electric shock This clause of Part 1 is applicable. 10 Change of
43、input voltage setting This clause of Part 1 is applicable. 11 Output voltage and output current under load This clause of Part 1 is applicable. 12 No-load output voltage This clause of Part 1 is applicable except as follows: Addition: The no-load output voltage is measured when the transformer is co
44、nnected to the rated supply voltage at the rated supply frequency at ambient temperature. 12.101 The no-load output voltage shall not exceed 50 V a.c. or 120 V ripple-free d.c. BS EN 61558-2-6:2009 8 61558-2-6 IEC:2009 For independent transformers, this output voltage limitation applies even when ou
45、tput windings, not intended for interconnection, are connected in series. NOTE The requirement for series connection does not apply to associated or IP 00 transformers. 12.102 The difference between the no-load output voltage and the output voltage under load shall not be excessive. The difference i
46、s expressed as a percentage of the latter voltage calculated according to the following formula: 100loadload-loadnoUUU(%) where Uno-load is the no-load output voltage and Uloadis the output voltage under load. Compliance with the requirements of 12.101 and 12.102 is checked by measuring the no-load
47、output voltage at the ambient temperature when the transformer, is connected to the rated supply voltage at the rated supply frequency. The difference shall not exceed the values shown in Table 101. Table 101 Output voltage difference Type of transformer Rated output VA Difference between no-load ou
48、tput voltage and output voltage under load % Inherently short-circuit-proof transformers: up to and including 63 100 over 63 up to and including 630 50 over 630 20 Other transformers: up to and including 10 100 over 10 up to and including 25 50 over 25 up to and including 63 20 over 63 up to and inc
49、luding 250 15 over 250 up to and including 630 10 over 630 5 13 Short-circuit voltage This clause of Part 1 is applicable. 14 Heating This clause of Part 1 is applicable. 15 Short-circuit and overload protection This clause of Part 1 is applicable. BS EN 61558-2-6:200961558-2-6 IEC:2009 9 16 Mechanical strength This clause of Part 1 is applicable. 17 Protection against harmful ingress of dust, solid objects and moisture This clause of
