1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationSafety of transformers, reactors, power supply units and combinations thereofPart 2-23: Particular requirements and tests for transformers and power supply units for construction
2、 sitesBS EN 61558-2-23:2010National forewordThis British Standard is the UK implementation of EN 61558-2-23:2010. It isidentical to IEC 61558-2-23:2010. It supersedes BS EN 61558-2-23:2001which withdrawn .The UK participation in its preparation was entrusted to Technical CommitteePEL/96, Small trans
3、formers.A list of organizations 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. BSI 2010ISBN 978 0 580 57400 9ICS 29.180; 29.260.10Compl
4、iance 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 December 2010.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 61558-2-23:2010will
5、 be on 1 October 2013EUROPEAN STANDARD EN 61558-2-23 NORME EUROPENNE EUROPISCHE NORM October 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B -
6、1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61558-2-23:2010 E ICS 29.180 Supersedes EN 61558-2-23:2000English version Safety of transformers, reactors, power supply units and combinations thereof - Part 2-23
7、: Particular requirements and tests for transformers and power supply units for construction sites (IEC 61558-2-23:2010) Scurit des transformateurs, bobines dinductance, blocs dalimentation et des combinaisons de ces lments - Partie 2-23: Rgles particulires et essais pour les transformateurs et les
8、blocs dalimentation pour chantiers (CEI 61558-2-23:2010) Sicherheit von Transformatoren, Drosseln, Netzgerten und entsprechenden Kombinationen - Teil 2-23: Besondere Anforderungen und Prfungen fr Transformatoren und Netzgerte fr Baustellen (IEC 61558-2-23:2010) This European Standard was approved by
9、 CENELEC on 2010-10-01. 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 national st
10、andards 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 language and n
11、otified to the Central Secretariat 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, Latv
12、ia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61558-2-23:2010EN 61558-2-23:2010 - 2 - Foreword The text of document 96/359/FDIS, future edition 2 of IEC 61558-2-23, prepared by IEC TC
13、 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 61558-2-23 on 2010-10-01. This European Standard supersedes EN 61558-2-23:2000. The main changes consist of updating th
14、is Part 2-23 in accordance with EN 61558-1:2005. This part 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 supplements or modifies the corresponding clauses in EN 61558-1, so as to convert that publication into
15、 the standard: Particular requirements and tests for transformers and power supply units for construction sites. 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 parti
16、cular 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. In this part, the following print types are used: requirements proper
17、: 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 101; supplementary annexes are entitled
18、 AA, BB, etc. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent 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 imple
19、mented at national level by publication of an identical national standard or by endorsement (dop) 2011-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the Internationa
20、l Standard IEC 61558-2-23:2010 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: BS EN 61558-2-23:2010- 3 - EN 61558-2-23:2010 IEC 60364-7-704:2005 NOTE Harmonized as E
21、N 60364-7-704:2007 (modified). IEC 61558-2-16:2009 NOTE Harmonized as EN 61558-2-16:2009 (not modified). BS EN 61558-2-23:2010EN 61558-2-23:2010 - 4 - Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced docum
22、ents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modification
23、s, indicated by (mod), the relevant EN/HD applies. Annex ZA of Part 1 is applicable except as follows: Addition: Publication Year Title EN/HD Year IEC 60068-2-27 - Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock EN 60068-2-27 - IEC 60439-4 - Low-voltage switchgear and controlg
24、ear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS) EN 60439-4 - 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 61558-2-23:2010 2
25、61558-2-23 IEC:2010 CONTENTS 1 Scope.5 2 Normative references6 3 Terms and definitions .6 4 General requirements .6 5 General notes on tests7 6 Ratings.7 7 Classification 8 8 Marking and other information.8 9 Protection against electric shock.10 10 Change of input voltage setting .10 11 Output volta
26、ge and output current under load 10 12 No-load output voltage10 13 Short-circuit voltage11 14 Heating.11 15 Short-circuit and overload protection .12 16 Mechanical strength12 17 Protection against harmful ingress of dust, solid objects and moisture.13 18 Insulation resistance, dielectric strength an
27、d leakage current 13 19 Construction .13 20 Components .16 21 Internal wiring.16 22 Supply connection and other external flexible cable or cords .16 23 Terminals for external conductors .16 24 Provisions for protective earthing 16 25 Screws and connections .16 26 Creepage distances, clearances and d
28、istances through insulation .17 27 Resistance to heat, fire and tracking .17 28 Resistance to rusting 17 Annexes19 Annex L Routine tests (production tests) 19 Bibliography20 Figure 101 Impact test for horizontal surface 18 Figure 102 Impact test for vertical surface 18 Table 101 Ratio of output volt
29、ages for safety isolating transformers 11 Table 102 Ratio of output voltages for isolating transformers 11 BS EN 61558-2-23:201061558-2-23 IEC:2010 5 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATIONS THEREOF Part 2-23: Particular requirements and tests for transformers and power
30、supply units for construction sites 1 Scope Replacement: This part of IEC 61558 deals with the safety of transformers for construction sites and power supply units incorporating transformers for construction sites. Transformers incorporating electronic circuits are also covered by this standard. NOT
31、E 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers transformers for construction sites and power supply units incorporating transformers for construction sites. This part is applicable to stationary or portable, s
32、ingle-phase or polyphase, air-cooled (natural or forced) independent or associated transformers, being isolating or safety isolating dry-type transformers for the use on construction sites. The windings may be encapsulated or non-encapsulated. The rated supply voltage does not exceed 1 000 V a.c., a
33、nd the rated supply frequency and the internal operating frequencies do not exceed 500 Hz. This standard used in combination with Part 2-16 for Switch mode power supply units (SMPS) is also applicable to power supplies with internal operating frequencies higher than 500 Hz. Where the two requirement
34、s are in conflict the most severe take precedence The rated output does not exceed: 25 kVA for single-phase transformers; 40 kVA for poly-phase transformers. This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufactu
35、rer. NOTE 2 Transformers intended to supply distribution networks are not included in the scope. Isolating transformers and power supply units incorporating isolating transformers for construction sites have a no-load output voltage and a rated output voltage exceeding 50 V a.c. and not exceeding 25
36、0 V a.c. Safety isolating transformers and power supply units incorporating safety isolating transformers for construction sites have a no-load output voltage and a rated output voltage not exceeding 50 V a.c. NOTE 3 This standard is applicable to transformers for the supply of electricity in locati
37、ons as specified in IEC 60364-7-704. The latter also specifies the protection by using an earthed midpoint or starpoint of the output winding. BS EN 61558-2-23:2010 6 61558-2-23 IEC:2010 Transformers and power supply units covered by this part are used in applications where it is required by the ins
38、tallation rules or by the appliance specification for protection purposes. When the transformers or power supply units are incorporated into low voltage switchgear and controlgear assemblies for construction sites as specified in IEC 60439-4, the additional requirements of IEC 60439-4 will apply to
39、the assembly. NOTE 4 For transformers filled with liquid dielectric or pulverised material, such as sand, additional requirements are under consideration. NOTE 5 Attention is drawn to the following: measures to protect the enclosure and the components inside the enclosure against external influences
40、 like fungus, vermin, termites, solar-radiation and icing should also be considered; the different conditions for transportation, storage, and operation of the transformers and power supply units should also be considered; additional requirements in accordance with other appropriate standards and na
41、tional rules may be applicable to transformers and power supply units intended for use in special environments such as tropical environment. NOTE 6 Future technological development of transformers may necessitate a need to increase the upper limit of the frequencies, until then this standard may be
42、used as a guidance document. 2 Normative references This clause of Part 1 is applicable except as follows: Addition: IEC 60068-2-27, Environmental testing Part 2-27: Tests Test Ea and guidance: Shock IEC 60439-4, Low-voltage switchgear and controlgear assemblies Part 4: Particular requirements for a
43、ssemblies for construction sites (ACS) IEC 61558-1:2005, Safety of power transformers, power supplies, reactors and similar products Part 1: General requirements and tests 3 Terms and definitions This clause of Part 1 is applicable except as follows: Addition: 3.101 low voltage switchgear and contro
44、lgear assembly for construction sites (ACS) combination of one or several transforming or switching devices with associated control, measuring, signalling, protective and regulating equipment complete with all their internal electrical and mechanical connections and structural parts, designed and bu
45、ilt for use on all construction sites, indoors or outdoors. 4 General requirements This clause of Part 1 is applicable. BS EN 61558-2-23:201061558-2-23 IEC:2010 7 5 General notes on tests This clause of Part 1 is applicable. 6 Ratings This clause of part 1 is applicable except as follows: Addition:
46、6.101 The rated output voltage shall not exceed: 250 V a.c. for isolating transformers with a non-earthed mid-point (single-phase) or a non-earthed star-point (three-phase) or delta connection (three-phase) and for power supply units incorporating such transformers; 110 V a.c. for isolating transfor
47、mers with a mid-point (single-phase) earthed in the construction or a star-point (three-phase) earthed in the construction and for power supply units incorporating such transformers; 50 V a.c. for safety isolating transformers and for power supply units incorporating safety isolating transformers. T
48、he rated output voltage shall exceed: 50 V a.c. for isolating transformers and for power supply units incorporating isolating transformers. Preferred values for the rated output voltage are 110 V and 230 V for portable, single-phase isolating transformers; 72 V, 110 V and 230 V for other isolating t
49、ransformers; 6 V, 12 V, 24 V, 42 V and 48 V for safety isolating transformers. 6.102 The rated output shall not exceed: 25 kVA for single-phase isolating and safety isolating transformers and power supply units incorporating such transformers; 40 kVA for polyphase isolating and safety isolating transformers and power supply units incorporating such transformers; Preferred values for the rated output are 25 VA, 40 VA, 63 VA, 100 VA, 160 VA, 250 VA, 400 VA, 630 VA
