1、BRITISH STANDARD BS EN 61238-1:2003 Incorporating Corrigendum No. 1 Compression and mechanical connectors for power cables for rated voltages up to 36 kV (U m= 42 kV) Part 1: Test methods and requirements The European Standard EN 61238-1:2003 has the status of a British Standard ICS 29.060.20 BS EN
2、61238-1:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 23 October 2003 BSI 11 November 2003 ISBN 0 580 42751 X National foreword This British Standard is the official English language version of EN 61238-1:2003. It was derived by CENELE
3、C from IEC 61238-1:2003. It supersedes BS 4579-1:1970 and BS 4579-3:1976 which are withdrawn. The CENELEC common modifications have been implemented at the appropriate places in the text and are indicated by tags (e.g. ). The UK participation in its preparation was entrusted by Technical Committee G
4、EL/20, Electric cables, to Subcommittee GEL/20/11, Cable accessories, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications r
5、eferred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary pr
6、ovisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposa
7、ls for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 58, an inside back cover and a back cover. The BSI co
8、pyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14855 Corrigendum No. 1 11 November 2003 Correction to pages 5 and 6EUROPEAN STANDARD EN 61238-1 NORME EUROPENNE EUROPISCHE NORM August 2003 CENELEC Europ
9、ean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for
10、 CENELEC members. Ref. No. EN 61238-1:2003 E ICS 29.060.20 English version Compression and mechanical connectors for power cables for rated voltages up to 36 kV (U m= 42 kV) Part 1: Test methods and requirements (IEC 61238-1:2003, modified) Raccords sertis et serrage mcanique pour cbles dnergie de t
11、ensions assignes infrieures ou gales 36 kV (U m= 42 kV) Partie 1: Mthodes et prescriptions dessais (CEI 61238-1:2003, modifie) Pressverbinder und Schraubverbinder fr Starkstromkabel fr Nennspannungen bis einschlielich 36 kV (U m= 42 kV) Teil 1: Prfverfahren und Anforderungen (IEC 61238-1:2003, modif
12、iziert) This European Standard was approved by CENELEC on 2003-06-01. 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-to-date lists and bibliogr
13、aphical 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 under the responsibility o
14、f 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
15、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 20/599/FDIS, future edition 2 of IEC 61238-1, prepared by IEC TC 20, Electric cables, was submitted to the IEC-CENELEC parallel vote and was approved
16、by CENELEC as EN 61238-1 on 2003-06-01. A draft amendment, prepared by the Technical Committee CENELEC TC 20, Electric cables, was submitted to the formal vote and was approved by CENELEC for inclusion into EN 61238-1 on 2003-06-01. The following dates were fixed: latest date by which the EN has to
17、be implemented at national level by publication of an identical national standard or by endorsement (dop) 2004-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-06-01 Annexes designated “normative“ are part of the body of the standard. Annexes
18、designated “informative“ are given for information only. In this standard, annexes A, B, E and ZA are normative and annexes C, D, F, G and H are informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61238-1:2003 was approved by CENELEC as a
19、European Standard with agreed common modifications. DOM NOMMOCITACIFINOS iTtle mAend eht title s otohw htf eolloniwu grepp ovatleg ilmi:t f.“oetar rv doltgaes ot pu k 63V (U m= k 24V)” Itnrcudotino Amedn eht nefo d f ehtirst scnetnee fo raprgaahp ot 1 r:dae f.“oetar rv doltgaes ot pu k 63V (U m= k 2
20、4V)” tcejbo dna epocS Amedn eht vtloega rferenecni e raprgaahp r ot 1:dae f.“oetar rv doltgaes ot pu k 63V (U m= k 24V,)”. ht nIB eiboilparghy, dad htf eolloniwn gf etoro hts etnaradi ddniceta:d IE49606 C ETON raHminoa dezs EN :49606ton( 6991 midofi.)de _ Page2 EN612381:200361238-1 IEC:2003 3 CONTEN
21、TS INTRODUCTION.5 1 Scope and object6 2 Normative references7 3 Definitions7 4 Symbols.9 5 General10 5.1 Conductor10 5.2 Connectors and tooling10 5.3 Range of approval .10 6 Electrical tests 11 6.1 Installation.11 6.2 Measurements.12 6.3 Heat cycle test.13 6.4 Assessment of results16 6.5 Requirement
22、s17 7 Mechanical tests.17 7.1 Method17 7.2 Requirements17 8 Test report18 Annex A (normative) Equalizers and their preparation.25 Annex B (normative) Measurements.27 Annex C (informative) Recommendations to improve accuracy of measurement .28 Annex D (informative) Determination of the value of the s
23、hort-circuit-current.29 Annex E (normative) Calculation method 30 Annex F (informative) Explanation of the calculation method.35 Annex G (informative) Explanation of the temperature profile52 Annex H (informative) Explanation of the statistical method of assessing results of tests on electrical conn
24、ectors 54 Annex ZA (normative) Normative references to international publications with their corresponding European publications 57 Bibliography58 Figure 1 Typical test circuit for through connectors and terminal lugs19 Figure 2 Typical test circuit for branch connectors 20 Figure 3 Typical cases of
25、 resistance measurements .23 Figure 4 Second heat cycle 24 Figure A.1 Preparation of equalizers.26 Figure E.1 Graphic example of assessment of an individual connector for Class A32 Figure F.1 Plot of connector resistance factors and parameter before heat cycle 1.40 Figure F.2 Plot of resistance fact
26、ors k ij , estimated mean resistance factors . i k and estimated overall mean k .42 Page3 EN612381:200361238-1 IEC:2003 4 Figure F.3 Plot of estimated mean resistance factors . i k , estimated overall mean k and parameter 43 Figure F.4 Typical ageing behaviour of an electrical connector (k limlimiti
27、ng resistance factor; t Llifetime) 44 Figure F.5 Plot of the resistance factors, fitted values, estimated intercept and estimated slope.45 Figure F.6 Plot of the fitted values, residuals and parameter M i .46 Figure F.7 Plot of the pointwise 90 % confidence interval for the mean response and paramet
28、er S i 48 Figure F.8 Plot of parameters M i , S iand D iwith regression line.49 Table 1 Minimum elevated current heating time 15 Table 2 Electrical test requirements17 Table 3 Tensile force for mechanical tests17 Table A.1 Equalizer dimensions25 Table F.1 Indices .35 Table F.2 Measured variables 35
29、Table F.3 Constants.35 Table F.4 Calculated variables .36 Table F.5 Repeatedly measured parameters.37 Table F.6 Number of calculated connector resistance factors k ijfor Class A connectors38 Table F.7 Connector resistance factors k ijfor Class A connectors related to the dummy variable x, the initia
30、l scatter and the mean scatter 41 Table F.8 Number of resistance factor ratios for connectors of Class A.50 Table F.9 Recorded maximum temperatures during heat cycling.51 Table H.1 Summary of requirements.56 Page4 EN612381:200361238-1 IEC:2003 5 INTRODUCTION This part of IEC 61238 deals with type te
31、sts for compression and mechanical connectors for use on copper or aluminium conductors of power cables for rated voltages up to 36 kV (U m= 42 kV). When a design of connector meets the requirements of this standard, then it is expected that in service: a) the resistance of the connection will remai
32、n stable; b) the temperature of the connector will be of the same order or less than that of the conductor; c) the mechanical strength will be fit for the purpose; d) if the intended use demands it, application of short-circuit currents will not affect a) and b). It should be stressed that, although
33、 the electrical and mechanical tests specified in this standard are to prove the suitability of connectors for most operating conditions, they do not necessarily apply to situations where a connector may be raised to a high temperature by virtue of connection to highly rated plant, or where the conn
34、ector is subjected to excessive mechanical vibration or shock or to corrosive conditions. In these instances, the tests in this standard may need to be supplemented by special tests agreed between supplier and purchaser. Page5 EN612381:200361238-1 IEC:2003 6 COMPRESSION AND MECHANICAL CONNECTORS FOR
35、 POWER CABLES FOR RATED VOLTAGES UP TO 36 kV (U m= 42 kV) Part 1: Test methods and requirements 1 Scope and object This part of IEC 61238 applies to compression and mechanical connectors for power cables for rated voltages up to 36 kV (U m= 42 kV) , e.g. buried cables or cables installed in building
36、s, having a) conductors complying with IEC 60228 and IEC 60228A with cross-sectional areas 10 mm 2and greater for copper and 16 mm 2and greater for aluminium, b) a maximum continuous conductor temperature not exceeding 90 C. This standard is not applicable to connectors for overhead conductors, whic
37、h are designed for special mechanical requirements, or to separable connectors with a sliding contact or multi- core connectors (i.e. ring connectors). Although it is not possible to define precisely the service conditions for all applications, two broad classes of connectors have been identified. C
38、lass A These are connectors intended for electricity distribution or industrial networks in which they can be subjected to short-circuits of relatively high intensity and duration. As a consequence, Class A connectors are suitable for the majority of applications. Class B These are connectors for ne
39、tworks in which overloads or short-circuits are rapidly cleared by the installed protective devices, e.g. fast-acting fuses. Depending on the application, the connectors are subjected to the following tests: Class A: heat cycle and short-circuit tests; Class B: heat cycle tests only. The object of t
40、his standard is to define the type test methods and requirements, which apply to compression and mechanical connectors for power cables with copper or aluminium conductors. Formerly, approval for such products has been achieved on the basis of national standards and specifications and/or the demonst
41、ration of satisfactory service performance. The publication of this IEC standard does not invalidate existing approvals. However, products approved according to these earlier standards or specifications cannot claim approval to this IEC standard unless specifically tested to it. Page6 EN612381:20036
42、1238-1 IEC:2003 7 After they have been made, these tests need not be repeated unless changes are made in the connector material, design or manufacturing process which might affect the performance characteristics. 2 Normative references The following referenced documents are indispensable for the app
43、lication 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 60050(461):1984, International Electrotechnical Vocabulary (IEV) Chapter 461: Electric cables Amendment 1 (19
44、93) IEC 60228:1978, Conductors of insulated cables IEC 60228A:1982, First supplement Conductors of insulated cables Guide to the dimen- sional limits of circular conductors IEC 60493-1:1974, Guide for the statistical analysis of ageing test data Part 1: Methods based on mean values of normally distr
45、ibuted test results 3 Definitions For the purposes of part of IEC 61238, the following definitions apply. Where possible, the definitions used are in accordance with IEC 60050(461). 3.1 connector (of cables) metallic device for connecting a conductor to an equipment terminal or for connecting two or
46、 more conductors to each other IEV 461-17-03, modified 3.2 through connector metallic device for connecting two consecutive lengths of conductor IEV 461-17-04 3.3 branch connector metallic device for connecting a branch conductor to a main conductor at an intermediate point on the latter IEV 461-17-
47、05 3.4 (terminal) lug metallic device to connect a cable conductor to other electrical equipment IEV 461-17-01 Page7 EN612381:200361238-1 IEC:2003 8 3.5 palm (of terminal lug) part of a terminal lug used to make the connection to electrical equipment IEV 461-17-07 3.6 barrel (of terminal lug, of con
48、nector, etc.) part of a device into which the conductor to be connected is introduced IEV 461-17-06 3.7 reference conductor length of unjointed bare conductor or conductor with the insulation removed, which is included in the test loop and which enables the reference temperature and reference resist
49、ance to be determined 3.8 equalizer arrangement used in the test loop to ensure a point of equipotential in a stranded conductor 3.9 compression jointing method of securing a connector to a conductor by using a special tool to produce permanent deformation of the connector and the conductor 3.10 mechani
