1、 IEC 61558-2-12 Edition 2.0 2011-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Safety of transformers, reactors, power supply units and combination thereof Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage Scurit des transform
2、ateurs, bobines dinductance, blocs dalimentation et des combinaisons de ces lments Partie 2-12: Exigences particulires et essais pour les transformateurs tension constante et les blocs dalimentation pour tension constante IEC 61558-2-12:2011 GROUP SAFETY PUBLICATION PUBLICATION GROUPE DE SCURIT THIS
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17、ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 61558-2-12 Edition 2.0 2011-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Safety of transformers, reactors, power supply units and combination thereof Part 2-12: Particular requirements and tests for constant voltag
18、e transformers and power supply units for constant voltage Scurit des transformateurs, bobines dinductance, blocs dalimentation et des combinaisons de ces lments Partie 2-12: Exigences particulires et essais pour les transformateurs tension constante et les blocs dalimentation pour tension constante
19、 INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE S ICS 29.180 PRICE CODE CODE PRIX GROUP SAFETY PUBLICATION PUBLICATION GROUPE DE SCURIT ISBN 978-2-88912-341-4 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Ele
20、ctrotechnique Internationale 2 61558-2-12 IEC:2011 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references . 7 3 Terms and definitions . 7 4 General requirements . 7 5 General notes on tests . 7 6 Ratings . 7 7 Classification 8 8 Marking and other information 8 9 Protection against electric shock 9
21、 10 Change of input voltage setting 9 11 Output voltage and output current under load . 9 12 No-load output voltage . 10 13 Short-circuit voltage . 11 14 Heating 11 15 Short-circuit and overload protection 11 16 Mechanical strength . 12 17 Protection against harmful ingress of dust, solid objects an
22、d moisture 12 18 Insulation resistance, dielectric strength and leakage current . 12 19 Construction . 13 20 Components . 17 21 Internal wiring . 17 22 Supply connection and other external flexible cables or cords 17 23 Terminals for external conductors . 17 24 Provision for protective earthing . 17
23、 25 Screws and connections . 17 26 Creepage distances, clearances and distances through insulation 17 27 Resistance to heat, fire and tracking . 18 28 Resistance to rusting 18 Annexes . 19 Annex C (normative) . 19 Annex D (normative) . 19 Annex L (normative) . 19 Annex R (normative) . 19 Bibliograph
24、y 20 61558-2-12 IEC:2011 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATION THEREOF Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage FOREWORD 1) The International
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34、pon, 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 element
35、s 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 61558-2-12 has been prepared by IEC technical committee 96: Transformers, reactors, power supply units, and combination thereof.
36、This second edition cancels and replaces the first edition published in 2001. It constitutes a technical revision. The main changes consist of updating this part in accordance with IEC 61558-1:2009. This part has the status of a group safety publication in accordance with IEC Guide 104: The preparat
37、ion of safety publications and the use of basic safety publications and group safety publications. 4 61558-2-12 IEC:2011 The text of this standard is based upon the following documents: FDIS Report on voting 96/253/FDIS 96/266/RVD Full information on the voting for the approval of this standard can
38、be found in the report on voting indicated in the above 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 t
39、hat standard. This part supplements or modifies the corresponding clauses in IEC 61558-1, so as to convert that publication into the IEC standard: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage. A list of all parts of the IEC 61558 ser
40、ies, under the general title: Safety of transformers, reactors, power supply units and combinations thereof, can be found on the IEC 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 th
41、e next edition. Where a particular 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 has to be adopted accordingly. In this part, the following print types
42、 are used: requirements proper: 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 are additional to those in Part 1 are numbered starting from 101; s
43、upplementary annexes are entitled AA, BB, etc. The committee has decided that the contents of this publication will remain unchanged until the stability 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 wil
44、l be reconfirmed, withdrawn, 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
45、make products in accordance 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. 61558-2-
46、12 IEC:2011 5 SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND COMBINATION THEREOF Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage 1 Scope Replacement: This part of IEC 61558 deals with the safety of constant voltage
47、transformers for general applications and power supply units for constant voltage for general applications. Constant voltage transformers incorporating electronic circuits are also covered by this standard. NOTE 1 Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified
48、, from here onward, the term transformer covers constant voltage transformers for general applications and power supply units for constant voltage for general applications. This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced), independent or as
49、sociated dry-type: constant voltage auto-transformers; constant voltage separating transformers; constant voltage isolating transformers; constant voltage safety isolating transformers. The windings may be encapsulated or non-encapsulated. This standard is applicable to transformers and power supply (linear) with internal operating frequencies not exceeding 500 Hz. This standard used in combination with Part 2
