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1、- - - - Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V Part 24: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers BS EN 61558-2-4:2009 National foreword This British St
2、andard is the UK implementation of EN 61558-2-4:2009. It is identical to IEC 61558-2-4:2009. It supersedes BS EN 61558-2-4:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PEL/96, Small transformers. A list of organizations represented on this com
3、mittee 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 2009 ISBN 978 0 580 57892 2 ICS 29.180 Compliance with a British Standard cannot confer immunity from le
4、gal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2009 Amendments issued since publication Amd. No. Date Text affected BRITISH STANDARDBS EN 61558-2-4:2009 EUROPEAN STANDARD EN 61558-2-4 NORME EUROPENNE EUROPISCHE
5、NORM May 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any mea
6、ns reserved worldwide for CENELEC members. Ref. No. EN 61558-2-4:2009 E ICS 29.180 Supersedes EN 61558-2-4:1997 English version Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-4: Particular requirements and tests for isolating tran
7、sformers and power supply units incorporating isolating transformers (IEC 61558-2-4:2009) Scurit des transformateurs, bobines dinductance, blocs dalimentation et produits analogues pour des tensions dalimentation jusqu 1 100 V - Partie 2-4: Rgles particulires et essais pour les transformateurs de sp
8、aration des circuits et les blocs dalimentation incorporant des transformateurs de sparation des circuits (CEI 61558-2-4:2009) Sicherheit von Transformatoren, Drosseln, Netzgerten und dergleichen fr Versorgungsspannungen bis 1 100 V - Teil 2-4: Besondere Anforderungen und Prfungen an Trenntransforma
9、toren und Netzgerte die Trenntransformatoren enthalten (IEC 61558-2-4:2009) 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 nat
10、ional 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
11、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 C
12、zech 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. BS EN 61558-2-4:2009 EN 61558-2-4:2009
13、 - 2 - Foreword The text of document 96/316/FDIS, future edition 2 of IEC 61558-2-4, 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 61558-2-4 on 200
14、9-03-01. This European Standard supersedes EN 61558-2-4:1997. 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
15、 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 isolating transformers and power supply units inco
16、rporating isolating 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 we
17、re 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 prin
18、t 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 10
19、1; supplementary annexes are entitled AA, BB, etc. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61558-2-4:2009 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note
20、 has to be added for the standard indicated: IEC 61558-2-16 NOTE Harmonized as EN 61558-2-16:200X (not modified). _ BS EN 61558-2-4:2009 - 3 - EN 61558-2-4:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications Addition to Annex ZA
21、 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. August 2005 2006 BS EN 61558-2-4:2009 2 61558-2-4 IEC:2009 CONTENTS 1 Scope.5 2 Normative referen
22、ces .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 input voltage setting 7 11 Output voltage and output current under load.7 12 No-load output voltag
23、e .8 13 Short-circuit voltage .8 14 Heating 9 15 Short-circuit and overload protection 9 16 Mechanical strength .9 17 Protection against harmful ingress of dust, solid objects and moisture9 18 Insulation resistance, dielectric strength and leakage current .9 19 Construction.9 20 Components.11 21 Int
24、ernal wiring.11 22 Supply connection and other external flexible cable or cords11 23 Terminals for external conductors.11 24 Provisions for protective earthing .11 25 Screws and connections.12 26 Creepage distances, clearances and distances through insulation12 27 Resistance to heat, fire and tracki
25、ng.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), clearances (cl) and distances through insulation (dti) Material group I (CTI 600)13 Annex R Explanat
26、ions 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 61558-2-4:2009 61558-2-4 IEC:2009 5 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1 100 V Part 2-4: P
27、articular requirements and tests for isolating transformers and power supply units incorporating isolating transformers 1 Scope Replacement: This part of IEC 61558 deals with the safety of isolating transformers for general applications and power supply units incorporating isolating transformers for
28、 general applications. Transformers incorporating electronic circuits are also covered by this standard. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers isolating transformers for general applications and po
29、wer supply units incorporating isolating transformers for general applications. NOTE 2 For power supply units (linear) this part is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable together with this part. This part is applicable to stationary or portable, single-phase or
30、 polyphase, air-cooled (natural or forced) independent or associated dry- type transformers. The windings may be encapsulated or non-encapsulated. The rated 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 ra
31、ted output does not exceed: 25 kVA for single-phase transformers; 40 kVA for polyphase transformers. This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. NOTE 3 Transformers intended to supply distribution
32、networks are not included in the scope. The no-load output voltage or the rated output voltage does exceed 50 V a.c. or 120 V ripple-free d.c., and where applicable, does not exceed 500 V a.c. or 708 V ripple-free d.c. The no-load output voltage and the rated output voltage may be up to 1 000 V a.c.
33、 or 1 415 V ripple-free d.c. for special applications. This part 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
34、 insulation between circuits is required by the installation rules or by the end product standard. BS EN 61558-2-4:2009 6 61558-2-4 IEC:2009 NOTE 4Attention is drawn to the following: - for transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from othe
35、r 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 transportatio
36、n, storage, and operation of the transformers should also be considered; - additional requirements in accordance with other appropriate standards and national rules may be applicable to transformers intended for use in special environments. NOTE 5Future technological development of transformers may
37、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, Safety of power transformers, power supplies, reactors and similar pr
38、oducts Part 1: General requirements and tests 3 Terms and definitions This 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. Addition: 6.101The rated
39、 output voltage shall exceed 50 V a.c. or 120 V ripple-free d.c. but not exceed; 250 V a.c. for single-phase portable transformers; 400 V a.c. for polyphase portable transformers, and 500 V a.c. or 708 V ripple-free d.c. for other transformers. In this case, the rated output voltage may be up to 1 0
40、00 V a.c. or 1 415 V ripple-free d.c. to be in accordance with the national wiring rules or for a special purpose. This output voltage limitation apply even when output windings, not intended for interconnection, are connected in series. 6.102 The rated output shall not exceed: 25 kVA for single-pha
41、se transformers; 40 kVA for polyphase transformers; BS EN 61558-2-4:2009 61558-2-4 IEC:2009 7 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 internal operating frequencies shall no
42、t 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. 7 Classification This clause of Part 1 is applicable. 8 Marking and other information This clause of Part 1 is applicable except a
43、s 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 Identification F F or Fail-safe isolating transformer 60417-5221 or Non-short-circui
44、t-proof isolating transformer 60417-5944 or Short-circuit-proof isolating transformer (inherently or non-inherently) 60417-5945 9 Protection against electric shock This clause of Part 1 is applicable. 10 Change of input voltage setting This clause of Part 1 is applicable. 11 Output voltage and outpu
45、t current under load This clause of Part 1 is applicable. BS EN 61558-2-4:2009 8 61558-2-4 IEC:2009 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 connected to the rated supply voltage at the r
46、ated supply frequency at ambient temperature defined by Part 1. 12.101 The no-load output voltage shall exceed 50 V a.c. or 120 V ripple-free d.c. but not exceed: 300 V a.c. for single-phase portable transformers; 500 V a.c. for polyphase portable transformers, and 500 V a.c. or 708 V ripple-free d.
47、c. for other transformers. In this case, the no-load output voltage may be up to 1 000 V a.c. or 1 415 V ripple-free d.c. to be in accordance with the national wiring rules or for special purpose. For independent transformers, this output voltage limitation applies even when output windings, not int
48、ended for interconnection, are connected in series. 12.102 The difference between the no-load output voltage and the output voltage under load shall not be excessive. The difference is expressed as a percentage of the latter voltage calculated according to the following formula: 100 load load-loadno
49、 I U UU (%) where Uno-load is the no-load output voltage and Uload is the output voltage under load. Compliance with the requirements of 12.101 and 12.102 is checked by measuring the no-load output voltage at the ambient temperature when the transformer, is connected to the rated supply voltage at the rated supply frequency. The differe