SANS 61558-2-4-2009 Safety of transformers reactors power supply units and similar products for supply voltages up to 1 100 V Part 2-4 Particular requirements and tests for isolatiora.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22441-7 SANS 61558-2-4:2009Edition 2IEC 61558-2-4:2009Edition 2SOUTH AFRICAN NATIONAL STANDARD Safety of transformers, reactors, power sup

4、ply units and similar products for supply voltages up to 1 100 V Part 2-4: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers This national standard is the identical implementation of IEC 61558-2-4:2009 and is adopted with the per

5、mission of the International Electrotechnical Commission. WARNING Can only be used in conjunction with SANS 61558-1. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 61558-2-4:2009 Editi

6、on 2 IEC 61558-2-4:2009 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 64A, Lighting and optics Lamps and auxiliaries, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 o

7、f the WTO/TBT agreement. This SANS document was published in May 2009. This SANS document supersedes SANS 61558-2-4:1997 (edition 1 as modified by nat. amdt 1:2007). IEC 61558-2-4Edition 2.0 2009-02INTERNATIONAL STANDARD NORME INTERNATIONALESafety of transformers, reactors, power supply units and si

8、milar products for supply voltages up to 1 100 V Part 2-4: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers Scurit des transformateurs, bobines dinductance, blocs dalimentation et produits analogues pour des tensions dalimentati

9、on jusqu 1 100 V Partie 2-4: Rgles particulires et essais pour les transformateurs de sparation des circuits et les blocs dalimentation incorporant des transformateurs de sparation des circuits INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE NICS 29.180 PRICE COD

10、ECODE PRIXISBN 2-8318-1028-7GROUP SAFETY PUBLICATION PUBLICATION GROUPE DE SCURIT Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale SANS 61558-2-4:2009This s tandard may only be used and printed by approved subscriptio

11、n and freemailing clients of the SABS . 2 61558-2-4 IEC:2009 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .6 3 Terms and definitions .6 4 General requirements.6 5 General notes on tests .6 6 Ratings.6 7 Classification7 8 Marking and other information 7 9 Protection against electric shock 7 1

12、0 Change of input voltage setting 7 11 Output voltage and output current under load .7 12 No-load output voltage .8 13 Short-circuit voltage .8 14 Heating 9 15 Short-circuit and overload protection 9 16 Mechanical strength .9 17 Protection against harmful ingress of dust, solid objects and moisture9

13、 18 Insulation resistance, dielectric strength and leakage current .9 19 Construction.9 20 Components .11 21 Internal wiring.11 22 Supply connection and other external flexible cable or cords 11 23 Terminals for external conductors.11 24 Provisions for protective earthing .11 25 Screws and connectio

14、ns.12 26 Creepage distances, clearances and distances through insulation12 27 Resistance to heat, fire and tracking.12 28 Resistance to rusting12 Annexes .13 Annex C Creepage distances (cr), clearances (cl) and distances through insulation (dti) Material group II (400 CTI 600) 13 Annex D Creepage di

15、stances (cr), clearances (cl) and distances through insulation (dti) Material group I (CTI 600)13 Annex R Explanations of the application of 4.2 of IEC 60664-1:2007 (see IEC 61558-1 Subclause 26.2)13 Bibliography14 Table 101 Output voltage difference 8 SANS 61558-2-4:2009This s tandard may only be u

16、sed and printed by approved subscription and freemailing clients of the SABS .61558-2-4 IEC:2009 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1 100 V Part 2-4: Particular requirements and tests for i

17、solating transformers and power supply units incorporating isolating transformers FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to pro

18、mote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides

19、 (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may Participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC als

20、o Participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possi

21、ble, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. Whi

22、le all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake

23、to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indi

24、cate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including

25、 individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance

26、upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elemen

27、ts of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International standard IEC 61558-2-4 has been prepared by IEC technical committee 96: Transformers, reactors, power supply units and similar products for l

28、ow voltages up to 1 100 V. This second edition cancels and replaces the first edition published in 1997. It constitutes a technical revision. The main changes consist of updating this part in accordance with Part 1 (2005), and increasing the supply voltages up to 1 100 V to be in line with the stand

29、ards of TC 14. This part 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. SANS 61558-2-4:2009This s tandard may only be used and printed by approved sub

30、scription and freemailing clients of the SABS . 4 61558-2-4 IEC:2009 The text of this standard is based on the following documents: FDIS Report on voting 96/316/FDIS 96/321/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the abov

31、e table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This part is intended to be used in conjunction with the latest edition of IEC 61558-1 and its amendments. It is based on the second edition (2005) of that standard. This part supplements or modifies the co

32、rresponding clauses in IEC 61558-1, so as to convert that publication into the IEC standard: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers. A list of all parts of the IEC 61558 series can be found on the IEC website under the

33、 title: Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V. 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 p

34、articular 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 pr

35、oper: 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 enti

36、tled AA, BB, etc. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, wi

37、thdrawn, replaced by a revised edition, or amended. NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing organizations may need a transitional period following publication of a new, amended or revised IEC publication in which to make products in acc

38、ordance with the new requirements and to equip themselves for conducting new or revised tests. It is the recommendation of the committee that the content of this publication be adopted for implementation nationally not earlier than 12 months from the date of publication. SANS 61558-2-4:2009This s ta

39、ndard may only be used and printed by approved subscription and freemailing clients of the SABS .61558-2-4 IEC:2009 5 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1 100 V Part 2-4: Particular requirements and tests for isolating transformers and

40、 power supply units incorporating isolating transformers 1 Scope Replacement: This part of IEC 61558 deals with the safety of isolating transformers for general applications and power supply units incorporating isolating transformers for general applications. Transformers incorporating electronic ci

41、rcuits are also covered by this standard. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers isolating transformers for general applications and power supply units incorporating isolating transformers for gener

42、al applications. NOTE 2 For power supply units (linear) this part is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable together with this part. This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or assoc

43、iated dry- type transformers. The windings may be encapsulated or non-encapsulated. The rated supply voltage does not exceed 1 100 V a.c., and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz. The rated output does not exceed: 25 kVA for single-phase transformer

44、s; 40 kVA for polyphase transformers. This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer. NOTE 3 Transformers intended to supply distribution networks are not included in the scope. The no-load output volt

45、age or the rated output voltage does exceed 50 V a.c. or 120 V ripple-free d.c., and where applicable, does not exceed 500 V a.c. or 708 V ripple-free d.c. The no-load output voltage and the rated output voltage may be up to 1 000 V a.c. or 1 415 V ripple-free d.c. for special applications. This par

46、t is not applicable to external 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 in applications where double or reinforced insulation between circuits is required by the installation ru

47、les or by the end product standard. SANS 61558-2-4:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS . 6 61558-2-4 IEC:2009 NOTE 4 Attention is drawn to the following: - for transformers intended to be used in vehicles, on board ships, and a

48、ircraft, 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 be considered; -

49、 the different conditions for transportation, storage, and operation of the transformers 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. NOTE 5 Future technological development of transformers may necessitate 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 o