1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 61558-2-8:2010Safety of transformers,reactors, power supply unitsand combinations thereof -Part 2-8: Particular requirements and testsfor transformers and power supply unit
2、s forbells and chimesBS EN 61558-2-8:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 61558-2-8:2010. It is identical to IEC 61558-2-8:2010. It supersedes BS EN 61558-2-8:1999 which is withdrawn.The UK participation in its preparation was entrusted to Techni
3、calCommittee PEL/96, Small transformers.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010 ISBN 978 0 580 7
4、2150 2 ICS 29.180 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2010. Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD
5、 EN 61558-2-8 NORME EUROPENNE EUROPISCHE NORM August 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights
6、of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61558-2-8:2010 E ICS 29.180 Supersedes EN 61558-2-8:1998English version Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for tra
7、nsformers and power supply units for bells and chimes (IEC 61558-2-8:2010) Scurit des transformateurs, bobines dinductance, blocs dalimentation et des combinaisons de ces lments - Partie 2-8: Rgles particulires et essais pour les transformateurs et blocs dalimentation pour sonneries et carillons (CE
8、I 61558-2-8:2010) Sicherheit von Transformatoren, Drosseln, Netzgerten und entsprechende Kombinationen - Teil 2-8: Besondere Anforderungen und Prfungen an Transformatoren und Netzgerten fr Klingeln und Lutewerke (IEC 61558-2-8:2010) This European Standard was approved by CENELEC on 2010-07-01. CENEL
9、EC 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 national standards may be obtained on ap
10、plication 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 language and notified to the Central Secret
11、ariat 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, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Ma
12、lta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 61558-2-8:2010 - 2 - Foreword The text of document 96/354/FDIS, future edition 2 of IEC 61558-2-8, prepared by IEC TC 96, Transformers, reactors, power supply units and
13、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 61558-2-8 on 2010-07-01. This European Standard supersedes EN 61558-2-8:1998. The main changes consist of updating this part in accordance with EN 61558-1:2005. This part
14、has the status of a group safety publication in accordance with IEC Guide 104:1997, The preparation of safety publications and the 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 pa
15、tent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. 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) 2011-04-01 latest dat
16、e by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-07-01 This part is intended to be used in conjunction with the latest edition of EN 61558-1 and its amendments. It is based on the second edition (2005) of that standard. This part supplements or modifies the c
17、orresponding clauses in EN 61558-1, so as to convert that publication into the EN standard: Particular requirements and tests for transformers and power supply units for bell and chime. A list of all parts of the EN 61558 series, under the general title: Safety of transformers, reactors, power suppl
18、y units and combinations 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 standards in this series will be updated at the time of the next edition. Where a particular subclause of Part 1 is not mentioned
19、 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 adopted accordingly. In this part, the following print types are used: requirements proper: in roman type; test specifications: in i
20、talic type; explanatory matters: 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 entitled AA, BB, etc. This European Standard has
21、been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and covers essential requirements of EC Directive 2006/95/EC. Annex ZA has been added by CENELEC. BS EN 61558-2-8:2010- 3 - EN 61558-2-8:2010 Endorsement notice The text of the Internati
22、onal Standard IEC 61558-2-8:2010 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 61558-2-16:2009 NOTE Harmonized as EN 61558-2-8:2009 (not modified). _ BS EN 61558-2
23、-8:2010EN 61558-2-8:2010 - 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 document. For dated references, only the edition cited applies. For u
24、ndated 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 ZA of Part 1 is applicable except as follows: Addition: Publica
25、tion 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 61558-2-8:2010 2 61558-2-8 IEC:2010 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references6 3 Terms
26、 and definitions .6 4 General requirements .6 5 General notes on tests6 6 Ratings.6 7 Classification 7 8 Marking and other information.7 9 Protection against electric shock.8 10 Change of input voltage setting .8 11 Output voltage and output current under load 8 12 No-load output voltage9 13 Short-c
27、ircuit voltage9 14 Heatingss .9 15 Short-circuit and overload protection .10 16 Mechanical strength10 17 Protection against harmful ingress of dust, solid objects and moisture.10 18 Insulation resistance, dielectric strength and leakage current 10 19 Construction .10 20 Components .12 21 Internal wi
28、ring.12 22 Supply connection and other external flexible cables or cords12 23 Terminals for external conductors .12 24 Provisions for protective earthing 12 25 Screws and connections .13 26 Creepage distances, clearances and distances through insulation .13 27 Resistance to heat, fire and tracking .
29、13 28 Resistance to rusting 13 Annexes14 Annex F Requirements for manually operated switches which are parts of transformer assemblies14 Bibliography14 BS EN 61558-2-8:201061558-2-8 IEC:2010 5 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATIONS THEREOF Part 2-8: Particular requirem
30、ents and tests for transformers and power supply units for bells and chimes 1 Scope Replacement: This part of IEC 61558 deals with the safety of bell and chime transformers and power supply units incorporating bell and chime transformers. Transformers incorporating electronic circuits are also cover
31、ed by this standard. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers bell and chime transformers and power supply units incorporating bell and chime transformers. This part is applicable to stationary, singl
32、e-phase, air-cooled (natural or forced) independent or associated dry-type transformers. The windings may be encapsulated or non-encapsulated. This standard is applicable to transformers and power supply (linear). This standard used in combination with part 2-16 for switch mode power supply (SMPS) u
33、nits is also applicable to power supplies with internal operating frequencies higher than 500 Hz. Where the two requirements are in conflict, the most severe takes precedence. The rated supply voltage does not exceed 250 V a.c., and the rated supply frequency and does not exceed 500 Hz. This standar
34、d is applicable to transformers and linear power supply units with internal operating frequency not exceeding 500 Hz. The rated output shall not exceed 100 VA. The no-load output voltage does not exceed 33 V a.c. or 46 V ripple-free d.c., and the rated output voltage does not exceed 24 V a.c., or 33
35、 V ripple-free d.c. Bell and chime transformers are generally intended to supply domestic sound signalling equipment and other similar devices where the load is applied for short periods of time. NOTE 2 A partial load may be applied for illumination purposes. This part is not applicable to external
36、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 only in applications where double or reinforced insulation between circuits is required by the installation rules or by the end product s
37、tandard. NOTE 3 Normally, the transformers are intended to be used with equipment to provide voltages different from the supply voltage for the functional requirements of the equipment. The protection against electric shock may be provided (or completed) by other features of the equipment, such as t
38、he body. Parts of output circuits may be connected to the input circuits or to protective earth. BS EN 61558-2-8:2010 6 61558-2-8 IEC:2010 This part is applicable to transformers associated with specific equipment, to the extent decided upon by the relevant IEC technical committees. NOTE 4 Attention
39、 is drawn to the following: - 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 transportation, storage, and operation of the tra
40、nsformer 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, such as tropical environment. NOTE 5 Future technological development of transformers may necess
41、itate 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 products
42、Part 1: General requirements and tests 3 Terms and definitions This clause of Part 1 is applicable except as follows: Addition: 3.1.101 bell and chime transformer single-phase safety isolating transformer specifically intended to supply household sound signalling equipment and other similar devices
43、4 General requirements This clause of Part 1 is applicable. 5 General notes on tests This clause of Part 1 is applicable. 6 Ratings Replacement: 6.101 The rated output voltage shall not exceed 24 V a.c. or 33 V ripple-free d.c For independent transformers, this output voltage limitation applies even
44、 when output windings, not intended for interconnection, are connected in series. 6.102 The rated output shall not exceed 100 VA. BS EN 61558-2-8:201061558-2-8 IEC:2010 7 6.103 The rated supply frequency and the internal operating frequencies shall not exceed 500 Hz. 6.104 The rated supply voltage s
45、hall not exceed 250 V a.c. Compliance with the requirements 6.101 to 6.104 is checked by inspection of the marking. 7 Classification This clause of Part 1 is applicable except as follows: 7.2 Replacement: According to short-circuit protection or protection against abnormal use: inherently short-circ
46、uit proof transformers; non-inherently short-circuit proof transformers; fail-safe transformers. 7.4 Replacement: According to their mobility: fixed transformers. 7.5 Replacement: According to their duty-type: short-time duty cycle; intermittent duty cycle. NOTE A partial load for illumination may b
47、e applied continuously. Addition: 7.101 According to the method of mounting: mounting in a distribution assembly; mounting in sound signalling devices (bells, chimes, buzzers, etc.); mounting on an outlet box or cabinet; flush mounted; surface mounted. 8 Marking and other information This clause of
48、Part 1 is applicable except as follows: 8.1 h) Replacement: The transformers shall be marked with one of the graphical symbols shown in 8.11; BS EN 61558-2-8:2010 8 61558-2-8 IEC:2010 8.11 Addition: Symbol or graphical symbol Explanation or title Identification FFail-safe bell and chime transformer
49、Based on Symbol IEC 60417- 5013 (2009-05) Short-circuit proof bell and chime transformer (inherently or non-inherently) IEC 60417- 5013 (2009-05) 9 Protection against electric shock This clause of Part 1 is applicable except as follows: Addition: 9.101 Protection against accidental contact with windings and hazardous live parts of the input circuit shall be ensured while connecting conductors to the output terminals. Compliance is checked by inspection and by the application of the standard test
