IEC 60947-7-3-2009 Low-voltage switchgear and controlgear - Part 7-3 Ancillary equipment - Safety requirements for fuse terminal blocks《低压开关设备和控制设备.第7-3部分 辅助设备.熔断器接线板的安全性要求》.pdf

1、 IEC 60947-7-3Edition 2.0 2009-04INTERNATIONAL STANDARD NORME INTERNATIONALELow-voltage switchgear and controlgear Part 7-3: Ancillary equipment Safety requirements for fuse terminal blocks Appareillage basse tension Partie 7-3: Matriels accessoires Exigences de scurit pour les blocs de jonction fus

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16、 le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60947-7-3Edition 2.0 2009-04INTERNATIONAL STANDARD NORME INTERNATIONALELow-voltage switchgear and controlgear Part 7-3: Ancillary equipment Safety requirements for fuse terminal blocks Appa

17、reillage basse tension Partie 7-3: Matriels accessoires Exigences de scurit pour les blocs de jonction fusible INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE WICS 29.120.99; 29.130.20 PRICE CODECODE PRIXISBN 2-8318-1038-7 Registered trademark of the Internationa

18、l Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60947-7-3 IEC:2009 CONTENTS FOREWORD.4 INTRODUCTION.6 1 General 7 1.1 Scope7 1.2 Normative references 7 2 Definitions 8 3 Classification9 4 Characteristics .9 4.1 Fuse-links .9 4.2 Rated power dissipation v

19、alue.9 4.2.1 Overload and short-circuit protection (PV)9 4.2.2 Exclusive short-circuit protection (PVK)9 4.3 Rated and limiting values 9 4.3.1 Rated voltages 9 4.3.2 Void.9 4.3.3 Standard cross-sections 9 4.3.4 Rated cross-section.9 4.3.5 Rated connecting capacity.9 4.3.6 Working voltage.10 5 Produc

20、t information 10 5.1 Marking .10 5.2 Additional information10 5.3 Marking on the packing unit.10 6 Normal service, mounting and transport conditions.11 6.1.1 Ambient temperature .11 7 Constructional and performance requirements11 7.1 Constructional requirements11 7.1.1 Clamping units 11 7.1.2 Mounti

21、ng .11 7.1.3 Clearances and creepage distances 11 7.1.4 Terminal identification and marking .12 7.1.5 Void.12 7.1.6 Rated cross-section and rated connecting capacity .12 7.1.7 Void.12 7.1.8 Actuating conditions 12 7.2 Performance requirements 12 7.2.1 Mechanical requirements during actuation.12 7.2.

22、2 Electrical requirements12 7.2.3 Thermal requirements13 7.3 Electromagnetic compatibility (EMC) .13 8 Tests13 8.1 Kinds of test 13 8.2 General .13 8.3 Verification of mechanical characteristics 13 8.3.1 General .13 8.3.2 Attachment of the fuse terminal block on its support14 60947-7-3 IEC:2009 3 8.

23、3.3 Mechanical properties of clamping units of a fuse terminal block .14 8.3.4 Compatibility between fuse terminal blocks and the fuse-link.14 8.3.5 Mechanical strength of the connection between the terminal block base and the fuse-carrier15 8.4 Verification of electrical characteristics15 8.4.1 Gen

24、eral .15 8.4.2 Void.16 8.4.3 Dielectric tests.16 8.4.4 Contact resistance.17 8.4.5 Temperature rise of clamping units18 8.4.6 Void.18 8.4.7 Ageing test (for screwless-type fuse terminal blocks only) .18 8.5 Verification of thermal characteristics19 8.5.1 General .19 8.5.2 Rated power dissipation 20

25、8.5.3 Durability.24 8.5.4 Needle flame test 24 8.6 Verification of EMC characteristics 26 Annex A (normative) Gauges .27 Annex B (informative) Power dissipation values PVand PVK28 Annex C (normative) Order of tests and number of specimens.36 Bibliography37 Figure 1 Test arrangement for the verificat

26、ion of the contact resistance.17 Figure 2 Test arrangement for separate arrangement 20 Figure 3 Test arrangement for compound arrangement21 Figure 4 Test arrangement for compound arrangement of short-circuit protection 22 Figure 5 Test arrangement for the needle flame test 25 Figure 6 Point of test

27、flame contact (view from the layer placed below the fuse terminal block)25 Figure A.1 Outline of the gauges27 Figure B.1 Derating curve in the case of exclusive short-circuit protection for a separate arrangement.30 Figure B.2 Derating curve in the case of exclusive short-circuit protection for a co

28、mpound arrangement 31 Figure B.3 Derating curve in the case of overload and short-circuit protection for a separate arrangement.33 Figure B.4 Derating curve in the case of overload and short-circuit protection for a compound arrangement 34 Table 1 Test forces 14 Table 2 Dummy fuse-links23 Table A.1

29、Dimensions and materials for gauges for fuse-links according to IEC 60127-2 .27 Table B.1 Results of derating curves in the case of exclusive short-circuit protection.32 Table B.2 Results of derating curves in case of overload and short-circuit protection35 Table C.1 Order of tests and number of spe

30、cimens36 4 60947-7-3 IEC:2009 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-3: Ancillary equipment Safety requirements for fuse terminal blocks FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization

31、comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote 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

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35、rm of recommendations for international use and are accepted by IEC National Committees in that sense. While 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 misinterpret

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37、egional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate 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

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40、 correct application of this publication. 9) Attention is drawn to the possibility that some of the elements 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 60947-7-3 has been pre

41、pared by subcommittee 17B: Low-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear. This second edition of IEC 60947-7-3 cancels and replaces the first edition, published in 2002, and constitutes a technical revision. The main technical modifications of this

42、 standard since this previous publication are listed below: requirements regarding clearances and creepage distances replaced by reference to Annex H of IEC 60947-1; requirements for the test of the mechanical strength of the clamping units improved in 8.3.3.1; requirements for tightening torques fo

43、r the tests improved and referenced to Table 4 of IEC 60947-1; 60947-7-3 IEC:2009 5 requirements for the resistance and the dimensions of dummy fuse-links specified in 8.5.2.5. This standard shall be read in conjunction with IEC 60947-1 and IEC 60947-7-1. The provisions of the general rules dealt wi

44、th in IEC 60947-1 and the requirements for terminal blocks of IEC 60947-7-1 are applicable to this standard, where specifically called for. Clauses and subclauses, tables, figures and annexes thus applicable are identified by reference to IEC 60947-1 or IEC 60947-7-1, e.g. 1.2 of IEC 60947-1, Table

45、4 of IEC 60947-7-1 or Annex A of IEC 60947-1. The text of this standard is based on the following documents: FDIS Report on voting 17B/1657/FDIS 17B/1671/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publi

46、cation has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 60947 series, under the general title Low-voltage switchgear and controlgear, can be found on the IEC website. The committee has decided that the contents of this publication will remain unc

47、hanged 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, withdrawn, replaced by a revised edition, or amended. 6 60947-7-3 IEC:2009 INTRODUCTION The standar

48、d for fuse terminal blocks covers not only the terminal block requirements but also takes into account the specifications of the cartridge fuse-links according to IEC 60127-1 and IEC 60127-2. A connection between these two standards is made by adding (adapting) the fundamental specifications of cart

49、ridge fuse-links (rated current, rated voltage, maximum voltage drop and maximum sustained power dissipation for cartridge fuse-links with the dimension of 5 mm 20 mm or 6,3 mm 32 mm with their different response characteristics) to the IEC 60947-7-1 requirements for terminal blocks. By this means, it is possible to judge the quality of the product “fuse terminal blocks