1、BRITISH STANDARDBS 7933-4:2008 HD 631.4:2008Electric cables Accessories Material characterisation Part 4: Fingerprinting for cold shrinkable components for low and medium voltage applications up to 20,8/36 (42) kVICS 29.035.20; 29.060.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44
2、g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS 7933-4:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2008 BSI 2008ISBN 978 0 580 64
3、307 1National forewordThis British Standard is the UK implementation of HD 631.4:2008.The UK participation in its preparation was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/11, Cable accessories. A list of organizations represented on this committee can be obtai
4、ned on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDa
5、te CommentsHARMONIZATION DOCUMENT HD 631.4 S1 DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT July 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassar
6、t 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. HD 631.4 S1:2008 E ICS 29.035.20; 29.060.20 English version Electrical cables - Accessories - Material characterisation - Part 4: Fingerprinting for cold sh
7、rinkable components for low and medium voltage applications up to 20,8/36 (42) kV Cbles lectriques - Accessoires - Caractrisation des matriaux - Partie 4: Essais didentification des composants rtractables froid pour les applications basse et moyenne tension jusqu 20,8/36 (42) kV Kabel und isolierte
8、Leitungen - Garnituren - Materialcharakterisierung - Teil 4: Fingerprint-Prfungen fr kaltschrumpfende Komponenten fr Nieder- und Mittelspannungsanwendungen bis 20,8/36 (42) kV This Harmonization Document was approved by CENELEC on 2008-06-01. CENELEC members are bound to comply with the CEN/CENELEC
9、Internal Regulations which stipulate the conditions for implementation of this Harmonization Document at national level. Up-to-date lists and bibliographical references concerning such national implementations may be obtained on application to the Central Secretariat or to any CENELEC member. This H
10、armonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit
11、huania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword This Harmonization Document was prepared by a task force under the direction of WG 11 of CENELEC TC 20, Electric cables. As agreed at the Bru
12、ges meeting (June 2007), the text of the draft was submitted to the formal vote and was approved by CENELEC as HD 631.4 S1 on 2008-06-01. The following dates were fixed: - latest date by which the existence of the HD has to be announced at national level (doa) 2008-12-01 - latest date by which the H
13、D has to be implemented at national level by publication of a harmonized national standard or by endorsement (dop) 2009-06-01 - latest date by which the national standards conflicting with the HD have to be withdrawn (dow) 2011-06-01 HD 631 will have 4 parts: Part 1: Fingerprinting and type tests fo
14、r resinous compounds Part 2: Fingerprinting and type tests for heat shrinkable components for low voltage applications Part 3: Fingerprinting for heat shrinkable components for medium voltage applications from 3,6/6 (7,2) kV up to 20,8/36 (42) kV Part 4: Fingerprinting for cold shrinkable components
15、 for low and medium voltage applications up to 20,8/36 (42) kV Fingerprinting of sealant components which are delivered as non heat shrinkable items, but that have an important interfacing role, is under consideration. NOTE It has been assumed in the preparation of this document that the execution o
16、f its provisions will be entrusted to appropriately qualified and experienced people, for whose use it has been produced. WARNING This Harmonization Document calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. It refers only to tec
17、hnical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. _ BS 7933-4:2008 2 Contents 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 4 4 Fingerprinting . 6 4.1 General . 6 4.2 Sampling . 6 4.3 Preparation and conditioning .
18、6 4.4 Tests . 6 4.5 Test report 6 Annex A (informative) - Health and safety . 8 Table 1 - Test methods and requirements 7 BS 7933-4:2008 3 1 Scope This Harmonization Document specifies the test methods and requirements for fingerprinting (as defined in 3.11) of cold shrinkable components intended to
19、 be used in cable accessories for low and medium voltage, as defined in EN 50393, HD 629.1 and HD 629.2. Fingerprinting of materials does not have a mandatory link to type testing of accessories. It shall be regarded as a stand-alone test, but may be carried out in combination with the accessory typ
20、e tests. Component basic functions can be: conductive, stress control or stress grading, insulating, oil barrier, anti tracking, external protection and sealing. Components are supplied as single layer items or as multi-layer items. Components are generally supplied pre-expanded or with a system all
21、owing expansion prior to installation. NOTE Information on health and safety is given in Annex A. 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
22、 edition of the referenced document (including any amendments) applies. EN 50393 Test methods and requirements for accessories for use on distribution cables of rated voltage 0,6/1,0 (1,2) kV HD 629.1 Test requirements on accessories for use on power cables of rated voltage from 3,6/6(7,2) kV up to
23、20,8/36(42) kV - Part 1: Cables with extruded insulation HD 629.2 Test requirements on accessories for use on power cables of rated voltage from 3,6/6 (7,2) kV up to 20,8/36 (42) kV - Part 2: Cables with impregnated paper insulation EN ISO 11358 Plastics - Thermogravimetry (TG) of polymers - General
24、 principles (ISO 11358) IEC 60050461 International Electrotechnical Vocabulary (IEV) - Chapter 461: Electric cables ISO 2781 Rubber, vulcanized - Determination of density 3 Terms and definitions For the purposes of this document, the following terms and definitions apply together with those given in
25、 IEC 60050-461. 3.1 cold shrinkable property of an elastomeric component previously expanded to recover to its original shape at ambient temperature after removal of the means of support BS 7933-4:2008 4 3.2 cold shrinkable component elastomeric extruded tubing or moulded part (single- or multi-laye
26、r) pre-expanded on a support or expanded prior to installation, which tends to recover to its original dimensions when the support is removed 3.3 multi-layer component component which consists of minimum two or more different materials bonded together 3.4 conductive component component whose materia
27、l has a defined electrical conductivity 3.5 stress control or stress grading component component whose material has defined electrical characteristics to control electrical field 3.6 insulating component component whose material has defined electrical characteristics to withstand electrical stress 3
28、.7 oil barrier component component whose material has defined material characteristics to prevent migration of cable impregnation compound 3.8 anti-tracking component component whose material has defined material characteristics to resist formation of conductive paths by surface electrical activity
29、3.9 sealant component component which, when used in conjunction with cold shrinkable components, forms a barrier along interfaces. It can be in the form of mastic, putty, grease or adhesive 3.10 external protection component component providing protection against the environment 3.11 fingerprinting
30、tests made to establish and subsequently confirm the properties of materials or components used in cable accessories 3.12 deviation variation of a property between the initial test values and test values measured on new samples at a later date 3.13 initial test tests made to establish the properties
31、 of materials or components used in cable accessories BS 7933-4:2008 5 3.14 mechanically assembled cold shrinkable components mechanical superposition of at least two cold shrinkable components on one support 3.15 support device that serves to retain a cold shrinkable component in its expanded state
32、 and that is removed to allow recovery 4 Fingerprinting 4.1 General Tests shall be carried out on cold shrinkable components as defined in Table 1. 4.2 Sampling Samples for fingerprinting shall be taken from material stored under conditions prescribed by the supplier. The fingerprinting test on cold
33、 shrinkable components shall be carried out either a) as a stand-alone test. Samples used for the initial test shall be taken from material available with or without sealant as agreed between supplier and user, or b) in combination with an accessory type test. Samples used for the initial test shall
34、 be taken from the same batch as those used in the accessory type test with or without sealant. In the event that no material from the same batch is available, the samples used for the initial test shall be taken from material available as agreed between supplier and user. 4.3 Preparation and condit
35、ioning Original components shall be individually prepared and conditioned in accordance with relevant test method conditions. For multi-layer components, the material samples shall be taken from individual layers. 4.4 Tests Components shall be tested in accordance with the tests specified in Table 1
36、. 4.5 Test report The test report shall include the following data: 1 part number or identification; 2 batch number and/or manufacturing date; 3 test methods and results; 4 copy of the technical data sheet (TDS) and material safety data sheet (MSDS), if any (refer to Annex A); 5 major test parameter
37、s, including conditioning and calibration; 6 expansion date (mm/yy) of component. BS 7933-4:2008 6 Table 1 - Test methods and requirements Material / Component property Test method Unit Requirements Deviation Comments Support dimensions: - Inner diameter - Outer diameter mm 5 % 5 % Weight ag 7,5 % S
38、hrink test bDensity ISO 2781 g/cm3 5 % For multi-layer components each individual layer shall be measured. Thermogravimetric analysis (TGA) cPolymer: - Weight loss - Mean temperature Carbon black: - Weight loss - Mean temperature Filler: - Weight loss - Mean temperature EN ISO 11358 % C % C % C 10 %
39、 15 K 10 % 15 K 10 % 15 K For multi-layer components each individual layer shall be measured. aComponents of mechanically assembled cold shrinkable component shall be weighed separately.b A suitable test method and requirements are under consideration. cTest sequence and conditions shall be clearly
40、recorded in the test report. The same sequence and conditions shall be used when the test is re-conducted. BS 7933-4:2008 7 Annex A (informative) Health and safety The supplier should make available on request the material safety data sheet (MSDS), if any, for each cold shrinkable component, in orde
41、r to enable the purchaser to transport, use and dispose of the components (including the support means) and their packaging in a safe manner in accordance with relevant EU or overriding national legislation in relevant languages. Further relevant information concerning health and safety linked to in
42、stallation conditions should be made available on request. BS 7933-4:2008 8 blankBS 7933-4:2008 HD 631.4:2008BSI Group Headquarters389 Chiswick High Road,London W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards Institution (BSI)BSI is the independent national body responsible for prepar
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