BS EN 60947-7-2-2009 Low-voltage switchgear and controlgear - Part 7-2 Ancillary equipment - Protective conductor terminal blocks for copper conductors《低压开关设备和控制设备 第7-2部分 辅助设备 铜导线用.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Low-voltage switchgear and controlgear Part 7-2: Ancillary equipment Protective conductor terminal blocks for cop

2、per conductorsBS EN 60947-7-2:2009National forewordThis British Standard is the UK implementation of EN 60947-7-2:2009. It isidentical to IEC 60947-7-2:2009. It supersedes BS EN 60947-7-2:2002 whichis withdrawn.The UK participation in its preparation was entrusted by Technical CommitteePEL/17, Switc

3、hgear, controlgear, and HV-LV co-ordination, to SubcommitteePEL/17/2, Low voltage 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

4、are responsible for its correct application. BSI 2009ISBN 978 0 580 68511 8ICS 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 July 2009Amen

5、dments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60947-7-2:2009EUROPEAN STANDARD EN 60947-7-2 NORME EUROPENNE EUROPISCHE NORM June 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee f

6、r Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60947-7-2:2009 E ICS 29.120.99; 29.130.20 Supersedes EN 60947-7-2:2002English version Low-vo

7、ltage switchgear and controlgear - Part 7-2: Ancillary equipment - Protective conductor terminal blocks for copper conductors (IEC 60947-7-2:2009) Appareillage basse tension - Partie 7-2: Matriels accessoires - Blocs de jonction de conducteur de protection pour conducteurs en cuivre (CEI 60947-7-2:2

8、009) Niederspannungsschaltgerte - Teil 7-2: Hilfseinrichtungen - Schutzleiter-Reihenklemmen fr Kupferleiter (IEC 60947-7-2:2009) This European Standard was approved by CENELEC on 2009-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions

9、for giving this European Standard the status of a national standard without any alteration. Up-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 of

10、ficial versions (English, French, German). A version in any other language made by translation 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 co

11、mmittees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the U

12、nited Kingdom. BS EN 60947-7-2:2009EN 60947-7-2:2009 2 Foreword The text of document 17B/1655/FDIS, future edition 3 of IEC 60947-7-2, 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

13、 by CENELEC as EN 60947-7-2 on 2009-06-01. This European Standard supersedes EN 60947-7-2:2002. The main technical modifications of EN 60947-7-2:2009 since EN 60947-7-2:2002 are listed below: requirements for tightening torques for the tests improved and referenced to Table 4 of EN 60947-1, Annex B

14、deleted; the wording of the short-time withstand current test improved in 8.4.6. This standard shall be read in conjunction with EN 60947-1 and EN 60947-7-1. The provisions of the general rules dealt with in EN 60947-1 and the requirements for terminal blocks of EN 60947-7-1 are applicable to this s

15、tandard, 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 60947-1, 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

16、 has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-06-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of

17、the International Standard IEC 60947-7-2:2009 was approved by CENELEC as a European Standard without any modification. _ BS EN 60947-7-2:2009 3 EN 60947-7-2:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following refer

18、enced 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. NOTE When an international publication has been modified by common m

19、odifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60439-1 A1 1999 2004 Low-voltage switchgear and controlgear assemblies - Part 1: Type-tested and partially type-tested assemblies EN 60439-1 A1 1999 2004 IEC 60715 + A1 1981 1995 Dimensions of low-vol

20、tage switchgear and controlgear - Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations EN 607152001 IEC 60947-1 2007 Low-voltage switchgear and controlgear - Part 1: General rules EN 60947-1 2007 IEC 60947-7-1 - 1)Low-voltage switchg

21、ear and controlgear - Part 7-1: Ancillary equipment - Terminal blocks for copper conductors EN 60947-7-1 2009 2)1)Undated reference. 2)Valid edition at date of issue. BS EN 60947-7-2:2009 2 60947-7-2 IEC:2009 CONTENTS 1 General 6 1.1 Scope6 1.2 Normative references 6 2 Definitions 7 3 Classification

22、7 4 Characteristics .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 informat

23、ion 8 5.1 Marking .8 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 id

24、entification and marking 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 cur

25、rent10 7.2.4 Voltage 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 e

26、lectrical characteristics11 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 BS EN 60947-7-2:200960947-7-2 IEC:2009 3 8.4.6 Short-time withstand current test .15 8.4.7 Ageing test (for screwless-type terminal blocks on

27、ly).16 8.5 Verification of thermal characteristics 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

28、 for the voltage drop test 13 Figure 3 Arrangement 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

29、rated connecting capacity of protective conductor terminal blocks .8 Table A.1 Maximum short-time withstand currents allocated to the rail profile and thermal rated current of a PEN busbar18 BS EN 60947-7-2:2009 6 60947-7-2 IEC:2009 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 7-2: Ancillary equipmen

30、t Protective 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(A

31、WG 8) with 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 Protect

32、ive conductor 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

33、between 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 te

34、rminal blocks 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

35、 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 Normative references The following referenced documents are indispensable for the application

36、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 60439-1:1999, Low-voltage switchgear and controlgear assemblies Part 1: Type-tested and partially type-tested assembli

37、es Amendment 1 (2004) IEC 60715:1981, Dimensions of Iow-voltage switchgear and controlgear Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations Amendment 1 (1995) IEC 60947-1:2007, Low-voltage switchgear and controlgear Part 1: Gener

38、al rules BS EN 60947-7-2:200960947-7-2 IEC:2009 7 IEC 60947-7-1, Low-voltage switchgear and controlgear Part 7-1: Ancillary equipment Terminal blocks for copper conductors 2 Definitions For the purposes of this document, definitions given in IEC 60947-7-1, together with the following definitions, ap

39、ply. 2.1 protective conductor terminal block device with one or more clamping units for connecting and/or joining protective conductors (PE and PEN conductors) with conducting connection to their supports, which may be designed with screw-type or screwless-type fixing means NOTE 1 Supports are, for

40、example, mounting rails, sheet metal cut-outs, mounting plates, etc. NOTE 2 A protective conductor terminal block can be either partially insulated or not at all. lt does not require any functional insulation. 2.2 partially insulated protective conductor terminal block device which is only insulated

41、 against live parts of other devices but not against the support itself 2.3 PEN conductor earthed conductor combining the functions of both protective conductor and neutral conductor NOTE The acronym PEN results from the combination of both symbols PE for the protective conductor and N for the neutr

42、al conductor (see 2.1.15 of IEC 60947-1). 3 Classification Distinction is made between various types of protective conductor terminal blocks as follows: method of fixing the protective conductor terminal block to the support; type of clamping units: screw-type clamping units or screwless-type clampi

43、ng units; ability to receive conductors with or without special preparation (e.g. cable lugs); terminal assemblies with identical or dissimilar clamping units; number of clamping units on each terminal assembly; service conditions; PE or PEN functions. 4 Characteristics 4.1 Summary of characteristic

44、s Subclause 4.1 of IEC 60947-7-1 applies. 4.2 Type of protective conductor terminal block Subclause 4.2 of IEC 60947-7-1 applies. BS EN 60947-7-2:2009 8 60947-7-2 IEC:2009 4.3 Rated and limiting values 4.3.1 Void 4.3.2 Short-time withstand current Subclause 4.3.2 of IEC 60947-7-1 applies. 4.3.3 Stan

45、dard cross-sections Subclause 4.3.3 of IEC 60947-7-1 applies with the following addition. In accordance with the scope of this standard, Table 1 of IEC 60947-7-1 applies only up to 120 mm2(250 kcmil). 4.3.4 Rated cross-section Subclause 4.3.4 of IEC 60947-7-1 applies. 4.3.5 Rated connecting capacity

46、 Subclause 4.3.5 of IEC 60947-7-1 applies with the modification for one conductor per clamping unit only, as for 7.4.3.1.6 of IEC 60439-1, and with the following Table 1. Table 1 Relationship between rated cross-section and rated connecting capacity of protective conductor terminal blocks Rated cros

47、s-section Rated connecting capacity mm2AWG/kcmil mm2AWG/kcmil0,2 24 0,2 24 0,34 22 0,2 0,34 24 22 0,5 20 0,2 0,34 0,5 24 22 20 0,75 18 0,34 0,5 0,75 22 20 18 1 0,5 0,75 1 1,5 16 0,75 1 1,5 20 18 16 2,5 14 1 1,5 2,5 18 16 14 4 12 1,5 2,5 4 16 14 12 6 10 2,5 4 6 14 12 10 10 8 4 6 10 12 10 8 16 6 6 10

48、16 10 8 6 25 4 10 16 25 8 6 4 35 2 16 25 35 6 4 2 50 0 25 35 50 4 2 0 70 00 35 50 70 2 0 00 95 000 50 70 95 0 00 000 120 250 70 95 120 00 000 250 5 Product information 5.1 Marking A protective conductor terminal block shall be marked in a durable and legible manner with the following: a) the name of the manufacturer or a trade mark by which the manufacturer can be readily identified; BS EN 60947-7-2:200960947-7-2 IEC:2009 9 b) a type reference permitting its identification in order to obtain relevant information from the manufacturer or his cat