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1、BRITISH STANDARD BS 6893-3: Sections 121 and 122:1995 IEC 684-3-121 and 122:1988 Flexible insulating sleeving for electrical purposes Part 3: Specification requirements for individual types of sleeving Sections 121 and 122: Extruded silicone sleeving (Implementation of HD 523.3.121 and 122 S1:1990)
2、UDC 621.315.616.9 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3:Sections 121 and 122:1995 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of
3、the Standards Board and comes into effect on 15 September 1995 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference GEL/15/3/5 Draft announced in BSI News April 1995 ISBN 0 580 24661 2 Committees responsible for this British Standard The preparation of th
4、is British Standard was entrusted by Technical Committee GEL/15, Insulating material, to Subcommittee GEL/15/3/5, Sleevings, upon which the following bodies were represented: Adhesive Tape Manufacturers Association British Rubber Manufacturers Association Ltd. Ministry of Defence Amendments issued s
5、ince publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3:Sections 121 and 122:1995 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Introduction3 1Scope3
6、 2Designation3 3Requirements3 Table I3 Table II3 Table III Requirements4 Table IV Requirements for breakdown voltage5 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3:Sections 121 and 122:1995 ii
7、BSI 09-1999 National foreword These Sections of BS 6893 have been prepared by Subcommittee GEL/15/3/5. They are identical with IEC 684-3-121 to 122:1988 Specification for flexible insulating sleeving Part 3: Specification requirements for individual types of sleeving Sheets 121 to 122: Extruded sili
8、con sleeving, published by the International Electrotechnical Commission (IEC), and endorsed by CENELEC as HD 523.3.121 to 122 S1. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Comp
9、liance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard IEC 684-1:1980BS 6893 Flexible insulating sleeving for electrical purposes Part 1:1987 Specification for general requirements (Identical) IE
10、C 684-2:1984Part 2:1987 Methods of test (Identical) IEC 757:1983BS 7645:1993 Code for designation of colours (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the HD title page, pages 2 to 6, an inside back cover and a back cover. This standar
11、d has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI DOCUMENT DHARMONISATION HARMONISIERUNG
12、SDOKUMENT HD 523.3.121 and 122 S1 December 1990 UDC 621.315.616.9 Descriptors: Electronic component, protection sleeving, flexible material, extruded silicone English version Specification for flexible insulating sleeving Part 3: Specification requirements for individual types of sleeving Sheets 121
13、 and 122: Extruded silicone sleeving (IEC 684-3-121 and 122:1988) Spcification pour gaines isolantes souples Troisime partie: Spcifications particulires aux types particuliers de gaines Feuilles 121 et 122: Gaines en silicone extrud (CEI 684-3-121 and 122:1988) Bestimmung fr flexible Isolierschluche
14、 Teil 3: Techische Lieferbedingungen fr einzelne Schlauchtypen Bltter 121 und 122: Extrudierte Silicon-Schluche (IEC 684-3-121 and 122:1988) This Harmonization Document was approved by CENELEC on 1990-12-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulat
15、e the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning national implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three o
16、fficial versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European
17、 Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1990 Copyright reserved to CENELEC members Ref. No. HD 523.3.121 and 122:1990 E Licensed Copy: she
18、ffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3 Section 121 and 122:1995 BSI 09-1999 2 Foreword This Harmonization Document was approved by CENELEC on 1 December 1990. The following dates were fixed: latest date of announcement of the HD at national
19、 level(doa) 1991-06-01 latest date of publication of a harmonized national standard(dop) 1991-12-01 latest date of withdrawal of conflicting national standards(dow) 1991-12-01 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3:Section
20、s 121 and 122:1995 BSI 09-19993 Introduction This standard is one of a series which deals with flexible insulating sleeving for electrical purposes. This series consists of three parts: Part 1: Definitions and General Requirements (IEC Publication 684-1); Part 2: Methods of Test (IEC Publication 684
21、-2); Part 3: Specification Requirements for Individual Types of Sleeving (IEC Publication 684-3). This standard gives two of the sheets comprising Part 3 as follows: Sheet 121: Extruded silicone sleeving, general purpose; Sheet 122: Extruded silicone sleeving, general purpose, low volatile content.
22、1 Scope This standard gives requirements for two types of non-heat-shrinkable sleeving extruded from silicone elastomer and distinguished principally by volatile content. These sleevings are normally available in bore sizes up to 25 mm and in a range of wall thicknesses between 0.1 mm and 2.0 mm. Na
23、tional standards may select a restricted list of preferred combinations of bore diameter and wall thickness. These sleevings are normally available in the following opaque colours: black, blue, brown, grey, green, orange, pink, red, violet, white, yellow and green/yellow. It is also available in col
24、ourless translucent form. 2 Designation The sleeving shall be identified by one of the following means: a) in words and numbers; b) by the designation which follows; c) by both the above. IEC 684-3-121 (or 122) nominal bore size in millimetres wall thickness colour. For example: IEC 684-3-121-0.8-0.
25、4-white. Any abbreviation used for colour shall comply with IEC Publication 757. 3 Requirements 3.1 General Sleeving shall comply with the general requirements given in IEC Publication 684-1, with the dimensional requirements of Table I and Table II and with the other requirements in Sub-clause 3.4
26、and in Table III and Table IV. 3.2 Bore diameter Bore diameter shall be measured in accordance with Sub-clause 3.1 of IEC Publication 684-2 and shall comply with the requirements of Table I. Table I 3.3 Wall thickness Wall thickness shall be measured in accordance with Sub-clause 3.2 of IEC Publicat
27、ion 684-2 and shall comply with the requirements of Table II. Table II In addition, the minimum wall thickness at any cross-section, determined in accordance with Sub-clause 3.3 of IEC Publication 684-2, shall be not less than the nominal value minus the negative tolerance given in Table II. 3.4 Vol
28、atile content When tested by the method specified in Clause 12 of IEC Publication 648-2, the values shall be as follows: Sheet 121: test not applicable; Sheet 122: 1 % maximum. Nominal bore diameter (mm) Tolerance (mm) 0.3 0.05, + 0.10 0.5 0.8 0.10, + 0.15 1.0 1.5 2.0 0.15, + 0.20 2.5 3 4 5 0.20 6 8
29、 10 0.25 12 16 20 25 0.50 Measurements shall be made to the nearest 0.05 mm. Nominal wall thickness (mm) Tolerance (mm) 0.1a 0,+ 0.10 0.2 0.4 0.5 0.7 1 0.05, + 0.15 1.5 2.0 0.20 a This wall thickness is normally only available for sleevings of nominal bore up to and including 1 mm. Licensed Copy: sh
30、effieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3:Sections 121 and 122:1995 4 BSI 09-1999 Table III Requirements Property Publication 684-2 Clause Units Maximum or minimum RequirementsRemarks Bending after heating 13There shall be no signs of crackin
31、g and the original colour shall be clearly recognizable Ageing temperature 200 5 C Mandrel diameter twice nominal external diameter Care should be taken to avoid damage to the sleeving, particularly during insertion of the mandrel Bending at low temperature 14There shall be no signs of cracking Test
32、 temperature: 60 C or below Up to and including 8 mm nominal bore, carry out the test with the sleeving unfilled, using a mandrel 20 times the nominal wall thickness Above 8 mm nominal bore, carry out the test on a strip of sleeving using a mandrel 10 times the nominal wall thickness Tensile strengt
33、h 19.1M Pamin.5.5Rate of jaw separation 500 25 mm/min Elongation at break 19.1%min.200Rate of jaw separation 500 25 mm/min Breakdown voltage 21kVmin.See Table IV Insulation resistance 22M7min. Room temperature 22.4.22 105 After damp heat 22.4.42 103 Flame propagation 26 Method A smax.60In addition,
34、the indicator flag on any of the three test specimens shall not be burned, nor shall flaming or glowing particles or flaming drops ignite the cotton Transparency28PassApplicable only when translucent sleeving is specified Thermal endurance Temperature index at 20 000 h 37min.180 The end point shall
35、be 50 % of the initial value of tensile strength This test need not be repeated unless the manufacturer has made a significant change in the composition or method of production of the material Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
36、BS 6893-3:Sections 121 and 122:1995 BSI 09-19995 Table IV Requirements for breakdown voltage Breakdown voltage shall be determined at room temperature and at elevated temperature using one of the three methods given in Sub-clause 21.2, 21.3 and 21.4 of IEC Publication 684-2. The results shall be not
37、 less than the values given in the table below. The rate of application of voltage shall be 500 V/s or such that the required breakdown value is reached between 10 s and 20 s. The test at elevated temperature shall be carried out at 180 3 C. Conditions of test Nominal wall thickness Room temperature
38、 (Publication 684-2 Sub-clause 21.7.2) Elevated temperature (Publication 684-2 Sub-clause 21.7.3) (mm)(kV)(kV) 0.11.31.0 0.22.41.8 0.44.73.5 0.55.54.0 0.78.06.0 110.78 1.51612 22015 The shot bath test, (Publication 684-2, Sub-clause 21.2) shall not be used for sleeving with nominal bore diameter abo
39、ve 3 mm. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3:Sections 121 and 122:1995 BSI 09-1999 List of references Se
40、e national foreword. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6893-3: Sections 121 and 122:1995 IEC 684-3-121 and 122:1988 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national b
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