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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7933-1:1998 ICS 29.035
2、.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Electric cables Accessories Material characterization Part 1: Resinous compounds before cure and in the cured state (Implementation of HD 631.1:1998) Licensed Copy: London South Bank University, London South Bank University,
3、Fri Dec 08 12:03:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7933-1:1998 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 December 1998 BSI 1998 ISBN
4、 0 580 30677 1 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard implements Harmonization Document HD 631.1:1998, which was published by the European Committee for Electrotechnical Standardization (CENELEC). The UK participation in its preparation
5、was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/7, Cable joints and terminations, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, an
6、d keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. 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 Europ
7、ean publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary
8、 provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the HD title page, pages 2
9、 to 8, an inside back cover and a back cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:03:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC national Members
10、 Ref. No. HD 631.1 S1:1998 E CENELEC European Committee for Electrotechnical Standardization Comite Europe en de Normalisation Electrotechnique Europa isches Komitee fu r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION
11、 HARMONISIERUNGSDOKUMENT HD 631.1 S1 May 1998 ICS 29.040.20; 29.060.20 Descriptors: electric cable, insulated cable, accessories, electrical insulation, solid electrical insulation, plastic, resin, definition, classification, test, characteristics, marking English version Material characterization P
12、art 1: Compounds for use in cable accessories: Resinous compounds before cure and in the cured state Caracte risation des mate riaux Partie 1: Matie res de remplissage des accessoires de ca bles: Compose s re sineux avant et apre s polyme risation Materialcharakterisierung Teil 1: Vergumassen fu r d
13、ie Anwendung in Kabelgarnituren: Gieharzmassen von dem Ausha rten und im ausgeha rteten Zustand This Harmonization Document was approved by CENELEC on 1998-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulationswhichstipulatetheconditionsforimplementationofthis Harmoniza
14、tion Document on a national level. Up-to-datelistsandbibliographicalreferencesconcerningsuchnational implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC mem
15、bers are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: London South Bank University, London Sou
16、th Bank University, Fri Dec 08 12:03:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7933-1:1998 2 BSI 1998 Foreword This Harmonization Document was prepared by a task force under the direction of Working Group 11 of CENELEC TC20, Electric cables. At its meeting in Copenhagen (June 1996) TC20 agree
17、d to send it to Formal Voting. This is Part 1 of HD 631, Materials characterization. This part defines a list of tests needed to characterize the solvent free polymerizable, reacting resinous compounds used for electrical insulation and mechanical protection in cable accessories covered by the follo
18、wing CENELEC HDs: HD 623, Specification for joints, stop ends and outdoor terminations for distribution cables of rated voltage 0,6/1,0 kV. HD 629.1, Test requirements on accessories for use on power cables of rated voltages from 3,6/6(7,2) kV up to 20,8/36(42) kV Part 1: Cables with extruded insula
19、tion. 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. Further parts will cover other material types used in cable accessories, e.g. heat shrink materials and cold shrink mate
20、rials, and also screening tests. The text of the draft was submitted to the formal vote and was approved by CENELEC as HD 631.1 S1 on 1998-04-01. The following dates were fixed: latest date by which the existence of the HD has to be announced at national level(doa) 1998-09-01 latest date by which th
21、e HD has to be implemented at national level by publication of a harmonized national standard or by endorsement(dop) 1999-03-01 latest date by which the national standards conflicting with the HD have to be withdrawn(dow) 1999-03-01 Contents Page Foreword2 1Scope3 2Normative references3 3Definitions
22、3 4General requirements4 5Resinous compound profile4 Annex A (normative) Gel time6 Annex B (normative) Exotherm peak temperature6 Annex C (normative) Accelerated ageing test8 Figure 1 Test apparatus for gel time determination7 Figure 2 Paper cup for gel time determination8 Table 1 Sequence of tests5
23、 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:03:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 19983 BS 7933-1:1998 1 Scope This HD details a minimum number of simple tests, identifying the properties profile of reacting resinous compounds used for cas
24、ting or encapsulation in accessories for low and medium voltage cables up to 20,8/36(42) kV as specified in HD 623, HD 629.1 and HD 629.2. For additional properties requested by the end users, reference should be made to IEC Publication 455 Parts 1, 2, 3 and 4. 2 Normative references This HD incorpo
25、rates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this HD onl
26、y when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). HD 623, Specification for joints, stop ends and outdoor terminations for distribution cables of rated voltage 0,6/1,0 kV. HD 629.1, Test requir
27、ements 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 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 impregnate
28、d paper insulation. ISO 179, Plastics; determination of Charpy impact strength of rigid materials. ISO 291, Plastics Standard atmospheres for conditioning and testing. ISO 868, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness). ISO 1183, Plastics Met
29、hods for determining the density and relative density of non-cellular plastics. ISO 1675, Plastics, liquid resins Determination of density by the pyknometer method. ISO 7056, Plastics laboratory ware beakers. IEC 455, Specification for solventless polymerisable resinous compounds used for electrical
30、 insulation. 3 Definitions 3.1 resinous compound a resinous compound for cable accessories is a compound made by the mixture of at least two components (resin and reagent) and to which, for some applications, additional components such as filler may be added 3.2 resin a resin for cable accessories i
31、s a liquid or liquefiable organic material that cures as a result of polyaddition or polymerization by means of reagents (hardener, accelerator, etc.) without releasing additional volatile products 3.3 reagents 3.3.1 accelerators accelerators for resins according to 3.2 are substances which, when ad
32、ded in small quantities, accelerate curing 3.3.2 hardeners hardeners for resins according to 3.2 are substances, or compounds of substances, which cause polyaddition or polymerization by cross-linking of the molecules 3.4 use before date (shelf-life) the use before date is the date until which the c
33、omponents of a resinous compound, when stored under specified conditions of temperature and humidity, can be mixed to form a resinous compound with specified properties 3.5 pot life pot life is the time available to mix the components of the resinous compound together and pour or inject the compound
34、 into the cable accessory, such that it continues to flow smoothly and cohesively 3.6 gel-time gel-time is the time required for the curing mixture to reach a gelatinous state as defined by the test method 3.7 exotherm peak temperature the exotherm peak temperature is the highest temperature which i
35、s reached during the curing process of a defined volume of resinous compound mixed at a defined temperature 3.8 density the density is the ratio of mass to volume 3.9 impact strength the impact strength is a measure of the toughness or brittleness of a cured resin Licensed Copy: London South Bank Un
36、iversity, London South Bank University, Fri Dec 08 12:03:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 BSI 1998 BS 7933-1:1998 3.10 Shore hardness the Shore hardness is a determination of the indentation hardness of material by means of durometers 3.11 deviation the deviation is the acceptable var
37、iation of a property between the original test values of the resinous compound associated with the accessory type test and the test values measured on new samples later on, expressed as a percentage of the latter 4 General requirements 4.1 Packaging Packaging shall be sufficient to ensure that any s
38、tated shelf life is maintained when stored under specified conditions of temperature and humidity such that the performance of the resinous compound, when forming part of the total accessory, is unaffected. 4.2 Marking and labelling Packaging for the components of resinous compounds shall contain th
39、e following information in the relevant national language(s): With each individual package: the suppliers name or logo; the base resin of the resinous compound; the volume of the components of the resinous compound; the batch number(s) or identification; the specified storage conditions, if any; the
40、 use before date (shelf life); the health and safety marking according to relevant EU or national legislation, and handling instructions, in relevant languages; the disposal instructions in relevant languages (where relevant); the mixing instructions, in relevant languages. 4.3 Health and safety The
41、 manufacturer/supplier shall make available safety data sheets in relevant languages that will enable the purchaser to transport, to use and to dispose of the casting resin and its packaging in a safe manner in accordance with the relevant EU or overriding national legislation. 4.4 Information to th
42、e end user The following data shall be given by the manufacturer to the end user, upon request: safety data sheets according to relevant EU legislation; pot life at 5 8C, 23 8C and 40 8C; exotherm peak temperature according to the test in annex B, or as requested by end user; time before energizing
43、the accessory after completion, or dielectric strength of the uncured resin. 5 Resinous compound profile 5.1 Sampling For the tests, which shall be carried out in accordance with the sequence given in Table 1, the components of the resinous compound, taken from their original containers, shall be us
44、ed. 5.2 Preparation and conditioning 5.2.1 Curing stage Compounds shall be prepared according to the suppliers instructions, and tested as defined in part 1 of the sequence of tests given in Table 1. 5.2.2 Cured stage and after ageing Compounds shall be prepared according to the suppliers instructio
45、ns and cured for 24 h at room temperature unless otherwise specified. After that, specimens shall be post-cured at (802) 8C for 24 h, unless otherwise specified in the test method, and then cooled in a desiccator for 24 h at room temperature. Conditioning shall be made according to ISO 291 using atm
46、osphere 23/50 (23 8C and 50 % relative humidity). Tests shall then be made according to part 2 (cured stage) and part 3 (after ageing) of the sequence of tests given in Table 1. 5.3 Reporting The test report shall give the following data: packaging; lot number or identification; conformity of markin
47、g and labelling; test results; major test parameters, including calibrations, if any; processing conditions to mix the compound. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:03:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 19985 BS 7933-1:1998 Table 1
48、Sequence of tests No.TestMethod of test UnitDeviation (see 3.11) Comments Part 1 Curing stage 1Gel timeAnnex Amin 30 % In agreement with suppliers data at 23 8C. 2ExothermAnnex B peak temperature8C 10 % time to peakmin 20 % Part 2 Cured stage (before ageing) 3DensityISO 1675 kg/m3 2 %a Alternative m
49、ethod ISO 1183 4Impact strength (without notch) ISO 179kJ/m2 25 % 5Shore hardnessISO 868unit 5 Not applicable to bitumen based resinous compoundsb Part 3 Cured stage (After accelerated ageing) 6Weight lossC.2% 20 % 7Change in impact strength (without notch) C.3 and ISO 179 % 25 % a For filled resinous compound10 %. b For bituminous based resinous compounds a needle penetration test shall be used. The deviation level shall be10 %. Licensed Copy: London South Bank U
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