1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationLow-voltage switchgear and controlgear Part 7-3: Ancillary equipment Safety requirements for fuse terminal blocksBS EN 60947-7-3:2009National forewordThis British Standard is the
2、 UK implementation of EN 60947-7-3:2009. It isidentical to IEC 60947-7-3:2009. It supersedes BS EN 60947-7-3:2002 whichis withdrawn.The UK participation in its preparation was entrusted by Technical CommitteePEL/17, Switchgear, controlgear, and HV-LV co-ordination, to SubcommitteePEL/17/2, Low volta
3、ge switchgear and controlgear.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 70136 8ICS
4、29.120.99; 29.130.20Compliance 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 January 2010Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS
5、 EN 60947-7-3:2009EUROPEAN STANDARD EN 60947-7-3 NORME EUROPENNE EUROPISCHE NORM November 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1
6、000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60947-7-3:2009 E ICS 29.120.99; 29.130.20 Supersedes EN 60947-7-3:2002English version Low-voltage switchgear and controlgear - Part 7-3: Ancillary equipment - Safet
7、y requirements for fuse terminal blocks (IEC 60947-7-3:2009) Appareillage basse tension - Partie 7-3: Matriels accessoires - Exigences de scurit pour les blocs de jonction fusible (CEI 60947-7-3:2009) Niederspannungsschaltgerte - Teil 7-3: Hilfseinrichtungen - Sicherheitsanforderungen fr Sicherungs-
8、Reihenklemmen (IEC 60947-7-3:2009) This European Standard was approved by CENELEC on 2009-09-01. 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
9、-to-date lists and bibliographical references concerning such national standards 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
10、 under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland,
11、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60947-7-3:2009EN 60947-7-3:2009 - 2 - Foreword The text of document 17B/1
12、657/FDIS, future edition 2 of IEC 60947-7-3, prepared by SC 17B, Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60947-7-3 on 2009-09-10. This European Standard supersedes EN 60947-7-3:
13、2002. The main technical modifications of EN 60947-7-3:2009 since EN 60947-7-3:2002 are listed below: requirements regarding clearances and creepage distances replaced by reference to Annex H of EN 60947-1; requirements for the test of the mechanical strength of the clamping units improved in 8.3.3.
14、1; requirements for tightening torques for the tests improved and referenced to Table 4 of EN 60947-1; 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 EN 60947-1 and EN 60947-7-1. The provisions of the gener
15、al rules dealt with in EN 60947-1 and the requirements for terminal blocks of EN 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 EN 60947-1 or EN 60947-7-1, e.g. 1.2 of EN 609
16、47-1, Table 4 of EN 60947-7-1 or Annex A of EN 60947-1. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-06-01 latest date by which the national standards conflicting with
17、 the EN have to be withdrawn (dow) 2012-09-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60947-7-3:2009 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes hav
18、e to be added for the standards indicated: IEC 60127-6 + A1 + A2 NOTE Harmonized as EN 60127-6:1994 + A1:1996 + A2:2003 (not modified). IEC 60715 + A1 NOTE Harmonized as EN 60715:2001 (not modified). IEC 61180-1 NOTE Harmonized as EN 61180-1:1994 (not modified). IEC 61180-2 NOTE Harmonized as EN 611
19、80-2:1994 (not modified). _ BS EN 60947-7-3:2009- 3 - EN 60947-7-3:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated referenc
20、es, 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 modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD
21、 Year IEC 60127-1 2006 Miniature fuses - Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links EN 60127-1 2006 IEC 60127-2 A1 2003 2003 Miniature fuses - Part 2: Cartridge fuse-links EN 60127-2 A1 2003 2003 IEC 60216-1 2001 Electrical insulating materials - Proper
22、ties of thermal endurance - Part 1: Ageing procedures and evaluation of test results EN 60216-1 2001 IEC 60695-11-5 2004 Fire hazard testing - Part 11-5: Test flames - Needle-flame test method - Apparatus, confirmatory test arrangement and guidance EN 60695-11-5 2005 IEC 60947-1 2007 Low-voltage swi
23、tchgear and controlgear - Part 1: General rules EN 60947-1 2007 IEC 60947-7-1 -1)Low-voltage switchgear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for copper conductors EN 60947-7-1 2009 ISO 3 1973 Preferred numbers - Series of preferred numbers - - ISO 4046-4 2002 Paper, boar
24、d, pulps and related terms - Vocabulary - Part 4: Paper and board grades and converted products - - 1)Undated reference. BS EN 60947-7-3:2009 2 60947-7-3 IEC:2009 CONTENTS INTRODUCTION.6 1 General 7 1.1 Scope7 1.2 Normative references 7 2 Definitions 8 3 Classification9 4 Characteristics .9 4.1 Fuse
25、-links .9 4.2 Rated power dissipation value.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 capac
26、ity.9 4.3.6 Working voltage.10 5 Product 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 requirements
27、11 7.1.1 Clamping units 11 7.1.2 Mounting .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 Mechanica
28、l requirements during actuation.12 7.2.2 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 o
29、n its support14 BS EN 60947-7-3:200960947-7-3 IEC:2009 3 8.3.3 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
30、 8.4 Verification of electrical characteristics15 8.4.1 General .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 characteri
31、stics19 8.5.1 General .19 8.5.2 Rated power dissipation 20 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
32、 Bibliography37 Figure 1 Test arrangement for the verification 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 arran
33、gement for the needle flame test 25 Figure 6 Point of test 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
34、 in the case of exclusive short-circuit protection for a compound 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 T
35、able 1 Test forces 14 Table 2 Dummy fuse-links23 Table A.1 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-circ
36、uit protection35 Table C.1 Order of tests and number of specimens36 BS EN 60947-7-3:2009 6 60947-7-3 IEC:2009 INTRODUCTION The standard 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
37、 60127-1 and IEC 60127-2. A connection between these two standards is made by adding (adapting) the fundamental specifications of cartridge 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
38、 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”. An important fact when using such cartridge fuse-links with fuse terminal blocks is that fu
39、ses heat up much less under rated load than they would do under overload conditions. The rated load is the result of rated current and maximum voltage drop. But there is a considerably increased power dissipation under overload conditions, equalling the maximum sustained power dissipation loss accor
40、ding to IEC 60127-2. In industrial applications, single fuse terminal blocks are used within an arrangement of terminal blocks or many of them forming an arrangement on their own. This means that the same current and fuse-link will result in different heat emissions. Furthermore, it should be taken
41、into account that apart from the general full range fuse (for overload and short-circuit protection), some fuse terminal blocks are exclusively used for short-circuit protection according to IEC 60364-4-43, e.g. in control circuits, where no overloads occur (i.e. safety coils, indicator lights or si
42、milar equipment). Consequently there are four different types of application that need to be described in the catalogue or indicated on the fuse terminal block. For more information, see Annex B. BS EN 60947-7-3:200960947-7-3 IEC:2009 7 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-3: Ancillary equi
43、pment Safety requirements for fuse terminal blocks 1 General 1.1 Scope This part of IEC 60947 applies to fuse terminal blocks with screw-type or screwless-type clamping units for the connection of rigid (solid or stranded) or flexible copper conductors for the reception of cartridge fuse-links in ac
44、cordance with IEC 60127-2, intended primarily for industrial or similar use in circuits not exceeding 1 000 V a.c., up to 1 000 Hz or 1 500 V d.c., and having a maximum short-circuit breaking capacity of 1 500 A. They are intended for installation in electrical equipment with enclosures which surrou
45、nd the fuse terminal blocks to such an extent that they are accessible only with the aid of a tool. For certain applications, for example in control circuits, the fuse terminal blocks may be designed exclusively for short-circuit protection. NOTE This standard may be used as a guide for fuse termina
46、l blocks for the reception of special cartridge fuse-links which do not meet the requirements of IEC 60127-2. The object of this standard is to specify safety requirements and test methods for the mechanical, electrical and thermal characteristics of fuse terminal blocks, to ensure the compatibility
47、 between terminal blocks and standardized fuse-links. This standard may be used as a guide for fuse terminal blocks requiring the fixing of special devices to the conductors, for example quick connect terminations or wrapped connections, etc.; fuse terminal blocks providing direct contact to the con
48、ductors by means of edges or points penetrating the insulation, for example insulation displacement 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 Normativ
49、e 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 edition of the referenced document (including any amendments) applies. IEC 60127-1:2006, Miniature fuses Part 1: Definitions for miniature fuses and general requirements for miniature fuse-links IEC 60127-2:2003, Miniature fuses Part 2: Cartridge fuse-links Am
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