1、BRITISH STANDARDBS EN 61558-2-1:2007Safety of power transformers, power supplies, reactors and similar products Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applicationsThe European Standard EN 61558-2-1:
2、2007 has the status of a British StandardICS 29.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61558-2-1:2007This British Standard was pub
3、lished under the authority of the Standards Policy and Strategy Committee on 31 May 2007 BSI 2007ISBN 978 0 580 50684 0National forewordThis British Standard was published by BSI. It is the UK implementation of EN 61558-2-1:2007. It is identical with IEC 61558-2-1:2007. It supersedes BS EN 61558-2-1
4、:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/96, Small transformers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions
5、 of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 61558-2-1 NORME EUROPENNE EUROPISCHE NORM March 2007 CENELEC European Commi
6、ttee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische 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
7、members. Ref. No. EN 61558-2-1:2007 E ICS 29.180 Supersedes EN 61558-2-1:1997English version Safety of power transformers, power supplies, reactors and similar products - Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers
8、for general applications (IEC 61558-2-1:2007) Scurit des transformateurs, alimentations, bobines dinductance et produits analogues - Partie 2-1: Rgles particulires et essais pour transformateurs disolement enroulements spars et alimentations incorporant des transformateurs disolement enroulements sp
9、ars pour applications dordre gnral (CEI 61558-2-1:2007) Sicherheit von Transformatoren, Netzgerten, Drosseln und dergleichen - Teil 2-1: Besondere Anforderungen und Prfungen an Netztransformatoren und Netzgerten, die Netztransformatoren enthalten, fr allgemeine Anwendungen (IEC 61558-2-1:2007) This
10、European Standard was approved by CENELEC on 2007-02-01. 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 refer
11、ences 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 in any other language made by translation under the responsibility of a CENELEC m
12、ember 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 Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Icela
13、nd, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 61558-2-1:2007 2 Foreword The text of document 96/252/FDIS, future edition 2 of IEC 61558-2-1, prepared by IEC TC 96
14、, Small power transformers, reactors, power supply units and similar products, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61558-2-1 on 2007-02-01. This European Standard supersedes EN 61558-2-1:1997. The main changes consist of updating this Part 2-1 in accordan
15、ce with EN 61558-1:2005, and adding power supplies to the scope. This Part 2-1 is intended to be used in conjunction with the latest edition of EN 61558-1 and its amendments. It is based on EN 61558-1:2005. This Part 2-1 supplements or modifies the corresponding clauses in EN 61558-1, so as to conve
16、rt that publication into the European standard: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications. Where a particular subclause of Part 1 is not mentioned in this Part 2-1, that subclause applies as far as
17、is reasonable. Where this Part 2-1 states “addition“, “modification“ or “replacement“, the relevant text of Part 1 is to be adapted accordingly. 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
18、endorsement (dop) 2007-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-02-01 In this Part 2-1, the following print types are used: requirements proper: in roman type; test specifications: in italic type; explanatory matter: in smaller roman t
19、ype. In the text of this Part 2-1, 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 6
20、1558-2-1:2007 was approved by CENELEC as a European Standard without any modification. _ 3 EN 61558-2-1:2007 CONTENTS 1 Scope 4 2 Normative references .5 3 Terms and definitions .5 4 General requirements.5 5 General notes on tests .6 6 Ratings 6 7 Classification6 8 Marking and other information 6 9
21、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 voltage .7 13 Short-circuit voltage .8 14 Heating 8 15 Short-circuit and overload protection 8 16 Mechanical strength .8 17 Protection against harmful ingress
22、 of dust, solid objects and moisture.8 18 Insulation resistance, dielectric strength and leakage current8 19 Construction.9 20 Components.9 21 Internal wiring 10 22 Supply connection and other external flexible cable or cords.10 23 Terminals for external conductors.10 24 Provisions for protective ea
23、rthing10 25 Screws and connections.10 26 Creepage distances, clearances and distances through insulation 10 27 Resistance to heat, fire and tracking.10 28 Resistance to rusting10 Annexes .11 Annex ZA (normative) Normative references to international publications with their corresponding European pub
24、lications .12 EN 61558-2-1:2007 4 SAFETY OF POWER TRANSFORMERS, POWER SUPPLIES, REACTORS AND SIMILAR PRODUCTS Part 2-1: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications 1 Scope Replacement: This part of IE
25、C 61558 deals with safety aspects of separating transformers and power supplies incorporating separating transformers such as electrical, thermal and mechanical safety. This Part 2-1 is applicable to separating transformers and power supplies incorporating both separating transformers and electronic
26、 circuits. This Part 2-1 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 2-1 does not apply to transformers covered by IEC 60076-11. This Part 2-1 applies
27、 to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent and associated separating transformers and power supplies, having a rated supply voltage not exceeding 1 000 V a.c., a rated supply and internal operating frequency not exceeding 500 Hz. The rated outpu
28、t does not exceed: 1 kVA for single-phase separating transformers and single-phase power supplies incorporating separating transformers; 5 kVA for poly-phase separating transformers and poly-phase power supplies incorporating separating transformers. This Part 2-1 is applicable to separating transfo
29、rmers and power supplies incorporating separating transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. This Part 2-1 is applicable to dry-type transformers. The windings may be encapsulated or non-encapsulated. The no-load output vol
30、tage or the rated output voltage does not exceed 1 000 V a.c. or 1 415 V ripple-free d.c. For independent separating transformers and independent power supplies, the no-load output voltage and / or the rated output voltage is not less than 50 V a.c., or 120 V ripple-free d.c. 5 EN 61558-2-1:2007 Sep
31、arating transformers covered by this Part 2-1 are used only in applications where double or reinforced insulation between circuits is not required by the installation rules or by the end product standard. NOTE 1 Normally, the separating transformers and power supplies incorporating separating transf
32、ormers 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 the body. Parts of output circuits ma
33、y be connected to the input circuits or to protective earth. This Part 2-1 is applicable to separating transformers and power supplies incorporating separating transformers associated with specific equipment, to the extent decided upon by the relevant IEC technical committees. NOTE 2 Attention is dr
34、awn to the following: for separating transformers and power supplies incorporating separating transformers intended to be used in vehicles, on board ships, and aircraft, additional requirements (from other applicable standards, national rules, etc.) may be necessary; measures to protect the enclosur
35、e 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 separating transformers and power supplies incorporating separatin
36、g transformers should also be considered; additional requirements in accordance with other appropriate standards and national rules may be applicable to separating transformers and power supplies incorporating separating transformers intended for use in special environments, such as tropical environ
37、ment. NOTE 3 Future technological development of separating transformers and power supplies incorporating separating transformers may necessitate a need to increase the upper limit of the frequencies, until then this Part 2-1 may be used as a guidance document. 2 Normative references This clause of
38、Part 1 is applicable. Addition: IEC 60076-11, Power transformers Part 11: Dry-type transformers 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 separating transformers an
39、d power supplies incorporating separating transformers where applicable. 4 General requirements This clause of Part 1 is applicable. EN 61558-2-1:2007 6 5 General notes on tests This clause of Part 1 is applicable. 6 Ratings Replacement: 6.101 The rated output voltage shall not exceed 1 000 V a.c or
40、 1 415 V ripple-free d.c. and for independent transformers shall exceed 50 V a.c. or 120 V ripple free d.c. For independent transformers, this output voltage limitation applies even when output windings, not intended for interconnection, are connected in series. 6.102 The rated output shall not exce
41、ed: 1 kVA for single-phase transformers, except for transformers subject to an agreement between the purchaser and the manufacturer; 5 kVA for poly-phase transformers, except for transformers subject to an agreement between the purchaser and the manufacturer. 6.103 The rated supply and internal oper
42、ating frequencies shall not exceed 500 Hz. 6.104 The rated supply voltage shall not exceed 1 000 V a.c. Compliance with the requirements of 6.101, 6.102, 6.103 and 6.104 is checked by inspection of the marking. 7 Classification This clause of Part 1 is applicable. 8 Marking and other information Thi
43、s clause of 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; 7 EN 61558-2-1:2007 8.11 Addition: Symbol or graphical symbol Explanation or title Identification F For Fail-safe separating transformer orNon-sho
44、rt-circuit-proof separating transformerIEC 60417-5223 (2002-10)orShort-circuit-proof separating transformer (inherently or non-inherently) IEC 60417-5220 (2002-10)9 Protection against electric shock This clause of Part 1 is applicable. 10 Change of input voltage setting This clause of Part 1 is appl
45、icable. 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: 12.101 The no-load output voltage shall not exceed 1 000 V a.c. or 1 415 V ripple-free d.c. For independent transfor
46、mers, 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 voltage under load shall not be excessive. The difference between the no-load output voltage meas
47、ured in this clause and the output voltage under load measured during the test of Clause 11, expressed as a percentage of the latter voltage, shall not exceed the values shown in Table 101. NOTE The ratio is defined as follows: UUUno-load loadload100 (%) where Uno-load is the no-load output voltage
48、and Uloadis the output voltage under load. EN 61558-2-1:2007 8 Table 101 Output voltage deviation Type of transformer Rated output VA Ratio between no-load output voltage and output voltage under load % Inherently short-circuit-proof transformers: up to and including 63 VA 100 over 63 VA up to and i
49、ncluding 630 VA 50 over 630 VA 20 Other transformers: up to and including 10 VA 100 over 10 VA up to and including 25 VA 50 over 25 VA up to and including 63 VA 20 over 63 VA up to and including 250 VA 15 over 250 VA up to and including 630 VA 10 over 630 VA 5 Compliance with the requirements of 12.101 and 12.102 is checked by measuring the no-load output voltage when at ambient temperature, the transformer being connected to the rated supply voltage at the rated su
