1、 IEC 60947-7-2Edition 3.0 2009-04INTERNATIONAL STANDARD NORME INTERNATIONALELow-voltage switchgear and controlgear Part 7-2: Ancillary equipment Protective conductor terminal blocks for copper conductors Appareillage basse tension Partie 7-2: Matriels accessoires Blocs de jonction de conducteur de p
2、rotection pour conducteurs en cuivre IEC60947-7-2:2009 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, inc
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16、vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60947-7-2Edition 3.0 2009-04INTERNATIONAL STANDARD NORME INTERNATIONALELow-voltage switchgear and controlgear Part 7-2: Ancillary equipment Protective conduc
17、tor terminal blocks for copper conductors Appareillage basse tension Partie 7-2: Matriels accessoires Blocs de jonction de conducteur de protection pour conducteurs en cuivre INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE RICS 29.120.99; 29.130.20 PRICE CODECODE
18、 PRIXISBN 2-8318-1038-1 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 60947-7-2 IEC:2009 CONTENTS FOREWORD.4 1 General 6 1.1 Scope6 1.2 Normative references 6 2 Definitions 7 3 Classification7 4 Characteristics .
19、7 4.1 Summary of characteristics .7 4.2 Type of protective conductor terminal block.7 4.3 Rated and limiting values 8 4.3.1 Void.8 4.3.2 Short-time withstand current8 4.3.3 Standard cross-sections 8 4.3.4 Rated cross-section.8 4.3.5 Rated connecting capacity.8 5 Product information 8 5.1 Marking .8
20、5.2 Additional information9 6 Normal service, mounting and transport conditions.9 7 Constructional and performance requirements9 7.1 Constructional requirements9 7.1.1 Clamping units.9 7.1.2 Connection of support .9 7.1.3 Clearance and creepage distances9 7.1.4 Terminal block identification and mark
21、ing 10 7.1.5 Resistance to abnormal heat and fire.10 7.1.6 Rated cross-section and rated connecting capacity .10 7.1.7 Protective conductor mounting rails .10 7.2 Performance requirements 10 7.2.1 Temperature rise .10 7.2.2 Dielectric properties.10 7.2.3 Short-time withstand current10 7.2.4 Voltage
22、drop10 7.2.5 Electrical performance after ageing (for screwless-type protective conductor terminal blocks only) .11 7.3 Electromagnetic compatibility (EMC) .11 8 Tests 11 8.1 Kinds of test 11 8.2 General .11 8.3 Verification of mechanical characteristics 11 8.4 Verification of electrical characteris
23、tics11 8.4.1 General .11 8.4.2 Void.12 8.4.3 Dielectric tests.12 8.4.4 Verification of the voltage drop 13 8.4.5 Temperature-rise test 14 60947-7-2 IEC:2009 3 8.4.6 Short-time withstand current test .15 8.4.7 Ageing test (for screwless-type terminal blocks only).16 8.5 Verification of thermal charac
24、teristics 17 8.6 Verification of EMC characteristics 17 Annex A (normative) Maximum short-time withstand currents allocated to the rail profile and thermal rated current of a PEN busbar .18 Figure 1 Arrangement for the dielectric test .12 Figure 2 Arrangement for the voltage drop test 13 Figure 3 Ar
25、rangement for the temperature-rise test for test group a) 15 Figure 4 Arrangement for the temperature-rise test for test group b) 15 Figure 5 Arrangement for the thermal short-time withstand current test16 Table 1 Relationship between rated cross-section and rated connecting capacity of protective c
26、onductor terminal blocks .8 Table A.1 Maximum short-time withstand currents allocated to the rail profile and thermal rated current of a PEN busbar18 4 60947-7-2 IEC:2009 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-2: Ancillary equipment Protective condu
27、ctor terminal blocks for copper conductors 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 promote international co-operation on all
28、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 (hereafter referred to as “IEC Publica
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34、d 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 individual experts and members of its
35、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 upon, this IEC Publication or any other
36、 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 elements of this IEC Publication may be the s
37、ubject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60947-7-2 has been prepared by subcommittee 17B: Low-voltage switchgear and controlgear, of IEC technical committee 17: Switchgear and controlgear. This third edition
38、of IEC 60947-7-2 cancels and replaces the second edition, published in 2002, and constitutes a technical revision. The main technical modifications of this standard since this previous publication are listed below: requirements for tightening torques for the tests improved and referenced to Table 4
39、of IEC 60947-1, Annex B deleted; the wording of the short-time withstand current test improved in 8.4.6. 60947-7-2 IEC:2009 5 This standard shall be read in conjunction with IEC 60947-1 and IEC 60947-7-1. The provisions of the general rules dealt with in IEC 60947-1 and the requirements for terminal
40、 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 4 of IEC 60947-7-1 or Annex A of IEC 60947-1. The t
41、ext of this standard is based on the following documents: FDIS Report on voting 17B/1655/FDIS 17B/1669/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 publication has been drafted in accordance with the ISO/
42、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 unchanged until the maintenance result date indicated
43、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 60947-7-2 IEC:2009 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-2: Ancillary equipment Protec
44、tive conductor terminal blocks for copper conductors 1 General 1.1 Scope This part of IEC 60947 specifies requirements for protective conductor terminal blocks with PE function up to 120 mm2(250 kcmil) and for protective conductor terminal blocks with PEN function equal to and above 10 mm2(AWG 8) wi
45、th screw-type or screwless-type clamping units, primarily intended for industrial applications. NOTE AWG is the abbreviation of “American Wire Gage” Gage (US) = Gauge (UK) kcmil = 1 000 cmil 1 cmil = 1 circular mil = surface of a circle having a diameter of 1 mil 1 mil = 1/1 000 inch Protective cond
46、uctor terminal blocks are used to form the electrical and mechanical connection between copper conductors and the fixing support. lt is applicable to protective conductor terminal blocks for the connection of round copper conductors with or without special preparation having a cross-section between
47、0,2 mm2and 120 mm2(AWG 24 and 250 kcmil), intended to be used in circuits of a rated voltage not exceeding 1 000 V a.c. up to 1 000 Hz or 1 500 V d.c., most commonly in conjunction with terminal blocks according to IEC 60947-7-1. This standard may be used as guide for protective conductor terminal b
48、locks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.; protective conductor terminal blocks providing direct contact to the conductors by means of edges or points penetrating the insulation, for example insulation displac
49、ement connections, etc. Where applicable in this standard, the term “clamping unit” has been used instead of the term “terminal”. This is taken into account in case of reference to IEC 60947-1. 1.2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest
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