1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSafety of transformers, reactors, power supply units and combination thereofPart 2-14: Particular requirements and tests for variable transformers and power supply units incorpor
2、ating variable transformersBS EN 61558-2-14:2013National forewordThis British Standard is the UK implementation of EN 61558-2-14:2013. It isidentical to IEC 61558-2-14:2012.The UK participation in its preparation was entrusted to Technical CommitteePEL/96, Small transformers.A list of organizations
3、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 application. The British Standards Institution 2013Published by BSI Standards Limited 2013ISBN 978 0
4、580 53172 9ICS 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 March 2013.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS
5、 EN 61558-2-14:2013EUROPEAN STANDARD EN 61558-2-14 NORME EUROPENNE EUROPISCHE NORM March 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000
6、 Brussels 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61558-2-14:2013 E ICS 29.180 English version Safety of transformers, reactors, power supply units and combination thereof - Part 2-14: Particular requirements and test
7、s for variable transformers and power supply units incorporating variable transformers (IEC 61558-2-14:2012) Scurit des transformateurs, bobines dinductance, blocs dalimentation et des combinaisons de ces lments - Partie 2-14 : Exigences particulires et essais pour les transformateurs variables et l
8、es blocs dalimentation incorporant des transformateurs variables (CEI 61558-2-14:2012) Sicherheit von Transformatoren, Drosseln, Netzgerten und deren Kombinationen - Teil 2-14: Besondere Anforderungen und Prfungen fr Stelltransformatoren und Netzgerte, die Stelltransformatoren enthalten (IEC 61558-2
9、-14:2012) This European Standard was approved by CENELEC on 2012-12-27. 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 biblio
10、graphical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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 resp
11、onsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre 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, Finl
12、and, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 61558-2-14:2013EN 6155
13、8-2-14:2013 - 2 - Foreword The text of document 96/395/FDIS, future edition 1 of IEC 61558-2-14, prepared by IEC/TC 96 “Transformers, reactors, power supply units and combination thereof“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61558-2-14:2013. The following date
14、s are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-09-27 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-12-27 This standard is
15、to be used in conjunction with EN 61558-1:2005 + A1:2009. This part supplements or modifies the corresponding clauses in EN 61558-1, so as to convert that publication into the EN standard: Particular requirements and tests for variable transformers and power supply units incorporating variable trans
16、formers. A list of all parts of the EN 61558 series, under the general title: Safety of transformers, reactors, power supply units and combination thereof, can be found on the CENELEC website. Future standards in this series will carry the new general title as cited above. Titles of existing standar
17、ds 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 ac
18、cordingly. 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 th
19、ose in Part 1 are numbered starting from 101; supplementary annexes are entitled AA, BB, etc. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent
20、rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC). Endorsement notice The text of the International Standard IEC 61558-2-14:2012 was approved by CENELEC as a European Standard withou
21、t any modification. In the Bibliography of EN 61558-1:2005, the following notes have to be added for the standards indicated: IEC 60076-11 NOTE Harmonised as EN 60076-11. IEC 61558-2-16 NOTE Harmonised as EN 61558-2-16. BS EN 61558-2-14:2013- 3 - EN 61558-2-14:2013 Annex ZA (normative) Normative ref
22、erences to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the
23、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 EN 61558-1:2005 is applicable except as follows: Publication Year Title EN/HD Ye
24、ar In Annex ZA of EN 61558-1:2005 add: IEC 61558-1 + corr. March + corr. March + corr. April + A1 2005 2010 2008 2011 2009 Safety of power transformers, power supplies, reactors and similar products - Part 1: General requirements and tests EN 61558-1 + corr. August + A1 2005 2006 2009 BS EN 61558-2-
25、14:2013 2 61558-2-14 IEC:2012 CONTENTS 1 Scope . 6 2 Normative references 8 3 Terms and definitions . 8 4 General requirements . 9 5 General notes on tests 9 6 Ratings . 10 7 Classification 10 8 Marking and other information . 10 9 Protection against electric shock . 12 10 Change of input voltage se
26、tting . 12 11 Output voltage and output current under load 12 12 No-load output voltage 12 13 Short-circuit voltage 14 14 Heating . 15 15 Short circuit and overload protection . 15 16 Mechanical strength 15 17 Protection against harmful ingress of dust, solid objects and moisture . 16 18 Insulation
27、resistance, dielectric strength and leakage current 16 19 Construction . 16 20 Components . 20 21 Internal wirings . 20 22 Supply connection and other external flexible cables or cords 20 23 Terminals for external conductors . 20 24 Provision for protective earthing 20 25 Screws and connections . 21
28、 26 Creepage distances, clearances and distances through insulation . 21 27 Resistance to heat, fire and tracking . 21 28 Resistance to rusting 21 Annexes 22 Bibliography 23 Table 101 Output voltages difference for auto transformers, separating and safety isolating transformers 14 Table 102 Output v
29、oltages difference for isolating transformers 14 Table 103 Maximum permitted temperatures of the winding 15 BS EN 61558-2-14:2013 6 61558-2-14 IEC:2012 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATION THEREOF Part 2-14: Particular requirements and tests for variable transformers
30、and power supply units incorporating variable transformers 1 Scope Replacement: This part of IEC 61558 deals with safety of variable transformers for general applications and power supply units incorporating variable transformers for general applications. Transformers incorporating electronic circui
31、ts are also covered by this standard. NOTE 1 Safety includes electrical, thermal, mechanical and chemical aspects. Unless otherwise specified, from here onward, the term transformer covers variable transformers for general applications and power supply units incorporating variable transformers for g
32、eneral applications. The rated supply voltage does not exceed 1 000 V a.c., and the rated supply frequency does not exceed 500 Hz. This standard is applicable to transformers and power supply units (linear) with internal operational frequencies not exceeding 500 Hz. This standard used in combination
33、 with Part 2-16 for switch mode power supply units (SMPS) is also applicable to power supplies with internal operational frequencies higher than 500 Hz. Where the two requirements are in conflict the most severe take precedence This part does not apply to transformers covered by IEC 60076-11. This p
34、art is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry-type transformers. variable auto-transformers and power supply units incorporating variable auto-transformers; variable separating transformers and power supply units
35、incorporating variable separating transformers; variable isolating transformers and power supply units incorporating variable isolating transformers; variable safety isolating transformers and power supply units incorporating variable safety isolating transformers. The windings may be encapsulated o
36、r non-encapsulated. The rated output does not exceed: 40 kVA for single-phase variable auto-transformers and power supply units incorporating single-phase variable auto-transformers; BS EN 61558-2-14:201361558-2-14 IEC:2012 7 200 kVA for poly-phase variable auto-transformers and power supply units i
37、ncorporating poly-phase variable auto-transformers; 1 kVA for single-phase variable separating transformers and power supply units incorporating single-phase variable separating transformers; 5 kVA for poly-phase variable separating transformers and power supply units incorporating poly-phase variab
38、le separating transformers; 25 kVA for single-phase variable isolating transformers and power supply units incorporating single-phase variable isolating transformers; 40 kVA for poly-phase variable isolating transformers and power supply units incorporating poly-phase variable isolating transformers
39、; 10 kVA for single-phase variable safety isolating transformers and power supply units incorporating single-phase variable safety isolating transformers; 16 kVA for poly-phase variable safety isolating transformers and power supply units incorporating poly-phase variable safety isolating transforme
40、rs. This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. NOTE 2 Transformers intended to supply distribution networks are not included in the scope. For variable auto-transformers and power supply units inc
41、orporating variable auto-transformers: the no-load output voltage or the rated output voltage does not exceed 1 000 V a.c. or 1 415 V ripple free d.c.; for independent auto-transformers the rated output voltage does exceed 50 V a.c or 120 V ripple-free d.c. but not exceed 250 V a.c. . NOTE 3 Normall
42、y, the variable auto-transformers and power supply units are intended to be associated with the equipment to provide voltages different from the supply voltage for the functional reasons. The protection against electric shock can be provided by other features of the equipment, such as the body. Vari
43、able auto-transformers and power supply units incorporating variable auto-transformers intended to be used by technically skilled or trained personnel are considered as associated transformers and associated power supply units and may have a rated output voltage less than 50 V a.c. For variable sepa
44、rating transformers and power supply units incorporating variable separating transformers: the no-load output voltage or the rated output voltage does not exceed 1 000 V a.c. or 1 415 V ripple free d.c.; for portable separating transormers the rated output voltage does exceed 50 V a.c or 120 V rippl
45、e-free d.c.; covered by this part may only be used where double or reinforced insulation between circuits is not required by the installation rules or by the end product standard. NOTE 4 Normally, variable separating transformers and power supply units are intended to be associated with equipment to
46、 provide voltages different from the supply voltage for the functional reasons. The protection against electric shock can be provided (or completed) by other features of the equipment, such as the body. Parts of output circuits can be connected to the protective earth. NOTE 5 Variable separating tra
47、nsformers and power supply units incorporating variable separating transformers intended to be used by technically skilled or trained personal are considered as associated transformers and associated power supply units and can have a rated output voltage less than 50 V a.c. or 120 V ripple-free d.c.
48、 For variable isolating transformers and power supply units incorporating variable isolating transformers: BS EN 61558-2-14:2013 8 61558-2-14 IEC:2012 the no-load output voltage or the rated output voltage does not exceed 500 V a.c. or 708 V ripple free d.c. The no-load output voltage and the rated
49、output voltage may be up to 1 000 V a.c. or 1 415 V ripple free d.c. for special applications or in accordance with national wiring rules; for independent isolating transformers the rated output voltage does not exceed 250 V a.c.; . are used where double or reinforced insulation between circuits is required by the installation rules or by the end product standard. For variable safety isolating transformers and power supply units incorporating safety isolating transformers:
