EN 61558-2-7-2007 en Safety of power transformers power supplies reactors and similar products - Part 2-7 Particular requirements and tests for transformers and power supplies for .pdf

1、BRITISH STANDARDBS EN 61558-2-7:2007Safety of power transformers, power supplies, reactors and similar products Part 2-7: Particular requirements and tests for transformers and power supplies for toys The European Standard EN 61558-2-7:2007 has the status of a British StandardICS 29.180g49g50g3g38g5

2、0g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61558-2-7:2007This British Standard was published under the authority of the Standards Policy and Strategy

3、Committee on 31 December 2007 BSI 2007ISBN 978 0 580 56481 9National forewordThis British Standard is the UK implementation of EN 61558-2-7:2007. It supersedes BS EN 61558-2-7:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/96, Small transform

4、ers.A list of 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.Compliance with a British Standard cannot confer immunity f

5、rom legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 61558-2-7 NORME EUROPENNE EUROPISCHE NORM October 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotec

6、hnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61558-2-7:2007 E ICS 29.180 Supersedes EN 61558-2-7:1997 + A11:2002English version Safety of power tra

7、nsformers, power supplies, reactors and similar products - Part 2-7: Particular requirements and tests for transformers and power supplies for toys (IEC 61558-2-7:2007, modified) Scurit des transformateurs, alimentations, bobines dinductance et produits analogues - Partie 2-7: Rgles particulires et

8、essais pour transformateurs et alimentations pour jouets (CEI 61558-2-7:2007, modifie) Sicherheit von Transformatoren, Netzgerten, Drosseln und dergleichen - Teil 2-7: Besondere Anforderungen und Prfungen an Transformatoren fr Spielzeuge (IEC 61558-2-7:2007, modifiziert) This European Standard was a

9、pproved by CENELEC on 2007-09-01. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning such n

10、ational 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 lang

11、uage 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 Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lat

12、via, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 61558-2-7:2007 2 Foreword The text of document 96/254/FDIS, future edition 2 of IEC 61558-2-7, prepared by IEC TC 96, Transformers, reactor

13、s, 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 61558-2-7 on 2007-09-01 with inclusion of a common modification intended to align this European Standard with EN 62115:2005. This European Standa

14、rd supersedes EN 61558-2-7:1997 + A11:2002. The main changes consist of updating EN 61558-2-7:1997, in accordance with EN 61558-1:2005, and adding power supplies to the scope. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an ide

15、ntical national standard or by endorsement (dop) 2008-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-09-01 This Part 2-7 is intended to be used in conjunction with EN 61558-1:2005. This Part 2-7 supplements or modifies the corresponding clau

16、ses in EN 61558-1, so as to convert that publication into the European Standard: Particular requirements and tests for transformers and power supplies for toys. When a particular subclause of Part 1 is not mentioned in this Part 2-7, that subclause applies as far as is reasonable. Where this standar

17、d states “addition“, “modification“ or “replacement“, the relevant text of Part 1 is to be adapted accordingly. In this Part 2-7, 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 thi

18、s standard, the words in bold are defined in Clause 3. Subclauses 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 61558-2-7:2007 was appro

19、ved by CENELEC as a European Standard with agreed common modifications. _ 3 EN 61558-2-7:2007 CONTENTS 1 Scope 4 2 Normative references .5 3 Terms and definitions .5 4 General requirements .5 5 General notes on tests5 6 Ratings 6 7 Classification6 8 Marking and other information.7 9 Protection again

20、st electric shock.7 10 Change of input voltage setting.8 11 Output voltage and output current under load8 12 No-load output voltage9 13 Short-circuit voltage9 14 Heating 9 15 Short-circuit and overload protection.10 16 Mechanical strength .10 17 Protection against harmful ingress of dust, solid obje

21、cts and moisture .12 18 Insulation resistance, dielectric strength and leakage current 12 19 Construction.12 20 Components.13 21 Internal wiring.15 22 Supply connection and other external flexible cables or cords15 23 Terminals for external conductors .15 24 Provisions for protective earthing15 25 S

22、crews and connections .15 26 Creepage distances, clearances, and distances through insulation 16 27 Resistance to heat, abnormal heat, fire and tracking .16 28 Resistance to rusting 16 Annex ZA (normative) Normative references to international publications with their corresponding European publicati

23、ons18 Figure 101 Small test finger .8 Figure 102 Arrangement for impact test for transformers (see 16.101) .11 EN 61558-2-7:2007 4 SAFETY OF POWER TRANSFORMERS, POWER SUPPLIES REACTORS AND SIMILAR PRODUCTS Part 2-7: Particular requirements and tests for transformers and power supplies for toys 1 Sco

24、pe Replacement: This part of IEC 61558 deals with safety aspects of transformers for toys and power supplies incorporating transformers for toys such as electrical, thermal and mechanical safety. This Part 2-7 is applicable to transformers for toys and power supplies incorporating both transformers

25、for toys and electronic circuits. This Part 2-7 is not applicable to external circuits and their components intended to be connected to the input terminals, output terminals or socket-outlets of the transformers and power supplies. This Part 2-7 applies to stationary and portable, single-phase, air-

26、cooled (natural or forced), transformers for toys and power supplies incorporating transformers for toys, having a rated supply voltage not exceeding 250 V a.c., a rated supply and internal operating frequency not exceeding 500 Hz, a rated output not exceeding 200 VA and a rated output current not e

27、xceeding 10 A. This Part 2-7 is applicable to independent transformers and transformers for specific use. This Part 2-7 is applicable to dry-type transformers for toys. The windings may be encapsulated or non-encapsulated. The no-load output voltage does not exceed 33 V a.c. for transformers for toy

28、s and power supplies incorporating transformers for toys, or 46 V ripple-free d.c. for power supplies incorporating transformers for toys, and the rated output voltage does not exceed 24 V a.c. for transformers and power supplies, or 33 V ripple-free d.c. for power supplies. In general, this Part 2-

29、7 does not take into consideration children playing with the transformers for toys and power supplies incorporating transformers for toys. NOTE 1 Attention is drawn to the following: for transformers for toys and power supplies incorporating transformers for toys intended to be used in vehicles, on

30、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

31、be considered; the different conditions for transportation, storage, and operation of the transformers for toys and power supplies incorporating transformers for toys should also be considered; 5 EN 61558-2-7:2007 additional requirements in accordance with other appropriate standards and national ru

32、les may be applicable to transformers for toys and power supplies incorporating transformers for toys intended for use in special environments, such as tropical environments. NOTE 2 Future technological development of transformers and power supplies may necessitate a need to increase the upper limit

33、 of the frequencies; until then, this Part 2-7 may be used as a guidance document. 2 Normative references This clause of Part 1 is applicable except as follows: Addition: IEC 60227-1, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V Part 1: General requirements IEC

34、 60245-1, Rubber insulated cables Rated voltages up to and including 450/750 V Part 1: General requirements 3 Terms and definitions This clause of Part 1 is applicable except as follows: Replacement of the third paragraph: When the term transformer is used from here forward, it covers transformers f

35、or toys and power supplies incorporating transformers for toys where applicable. Addition: 3.1.101 transformer for toys independent safety isolating transformer designed to supply toys not fixed to, or incorporated in, toys and having a rated output voltage not exceeding 24 V a.c. 3.1.102 power supp

36、ly for toys power supply incorporating a transformer for toys not fixed to, or incorporated in, toys and having a rated output voltage not exceeding 24 V a.c. or 33 V ripple-free d.c 4 General requirements This clause of Part 1 is applicable. 5 General notes on tests This clause of Part 1 is applica

37、ble. EN 61558-2-7:2007 6 6 Ratings Replacement: 6.101 The rated output voltage shall not exceed 24 V a.c for transformers and power supplies or 33 V ripple-free d.c. for power supplies. 6.102 The rated output shall not exceed 200 VA. 6.103 The rated supply frequency shall not exceed 500 Hz. 6.104 Th

38、ere shall be only one rated supply voltage not exceeding 250 V a.c. 6.105 The rated output current shall not exceed 10 A. Compliance with the requirements of 6.101 to 6.105 is checked by inspection of the marking. 7 Classification This clause of Part 1 is applicable except as follows: 7.1 Replacemen

39、t: According to their protection against electric shock: transformers shall be of class II construction. 7.2 Replacement: According to short-circuit protection or protection against abnormal conditions: inherently short-circuit-proof transformers; non-inherently short-circuit-proof transformers; fai

40、l-safe transformers. 7.4 Replacement: According to their mobility: portable transformers; stationary transformers. 7.5 Replacement: According to their duty-type: continuous operation. 7 EN 61558-2-7:2007 8 Marking and other information This clause of Part 1 is applicable except as follows: 8.1 Item

41、h) Addition: Transformers for toys shall be marked with one of the graphical symbols shown in 8.11; 8.1 Item n) Modification: transformers suitable for outdoor use shall be marked with the appropriate IP code; 8.11 Addition: Symbol or graphical symbol Explanation or title Identification Transformers

42、 for toys (inherently short-circuit-proof transformers, non-inherently short-circuit-proof transformers or fail-safe transformers) IEC 60417-5219 (2002-10) 8.101 The INSTRUCTION FOR USE shall include the following statement or equivalent: Instructions to parents: ”Transformers and power supplies for

43、 toys are not intended to be used as toys, and the use of these products by children shall be under the full supervision of parents.” 9 Protection against electric shock This clause of Part 1 is applicable except as follows: 9.1.2 Modification: The standard test finger of Figure 2 is replaced by the

44、 small test finger of Figure 101. EN 61558-2-7:2007 8 Extension CollarPivots points Sphere r = 4,3 451,6 101,657,919,319,3 19,3 8,638,438,1IEC 2386/06 Matire: mtal Dimensions en millimtres Tolrances sur les dimensions 0,125 mm Les deux articulations doivent permettre un mouvement, dans le mme sens,

45、de 90 avec une tolrance de 0 +10 Material: metal Dimensions in millimetres Tolerances on dimensions 0,125 mm Both joints shall permit movement in the same plane and the same direction through an angle of 90 with a 0 to +10 tolerance Figure 101 Small test finger 9.1.2 Addition: It shall not be possib

46、le to gain access to live parts of the input circuit or to the metal parts separated from live parts by basic insulation only, even after removal of the covers that can be removed with the aid of a tool. 10 Change of input voltage setting This clause of Part 1 is applicable except as follows: Replac

47、ement: Transformers shall have only one rated supply voltage or one rated supply voltage range. Compliance is checked by inspection. 11 Output voltage and output current under load This clause of Part 1 is applicable except as follows: 11.1 Modification: When the transformer is connected to the rate

48、d supply voltage, at the rated supply frequency and loaded with an impedance resulting in the rated output at the rated output voltage and, for an a.c. rated power factor, the output voltage shall not differ from the rated value by more than 10 % for a.c. or 15 % for d.c. 9 EN 61558-2-7:2007 This re

49、quirement is applicable to all the output windings and their tappings. 12 No-load output voltage This clause of Part 1 is applicable except as follows: Addition: 12.101 The no-load output voltage shall not exceed 33 V a.c. or 46 V ripple-free d.c. For toy transformers, this output voltage limitation applies even when output windings not intended for interconnection are connected in series. 12.102 The difference between the no-load output voltage and the output