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1、BRITISH STANDARD BS 7655-3.1: 1997 Specification for Insulating and sheathing materials for cables Part 3: PVC insulating compounds Section 3.1 Harmonized types IMPORTANT NOTE. This Section of BS 7655 is to be read in conjunction with BS 7655-0. ICS 29.035.20 Licensed Copy: London South Bank Univers
2、ity, London South Bank University, Fri Dec 08 12:02:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-3.1:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 1
3、5 October 1997 BSI 10-1999 First published April 1993 Second edition October 1997 The following BSI references relate to the work on this standard: Committee reference GEL/20/3 Draft for comment 96/213358 DC ISBN 0 580 28364 X Committees responsible for this British Standard The preparation of this
4、British Standard was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/3, Insulation and sheath, upon which the following bodies were represented: Association of Consulting Engineers British Approvals Service for Cables British Cable Makers Confederation British Plasti
5、cs Federation British Railways Board British Rubber Manufacturers Association Ltd. British Telecommunications plc Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association ERA Technology Ltd. GAMBICA (BEAMA Ltd.) London Underground Ltd. Ministry of Defence Queen Ma
6、ry and Westfield College Telecommunications Cables Group of BCMC Warrington Fire Research Centre Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-
7、3.1:1997 BSI 10-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3Definitions1 4Requirements1 Table 1 Types of harmonized PVC insulation1 Table 2 Test requirements2 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02
8、:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-3.1:1997 ii BSI 10-1999 Foreword This Section of BS 7655 has been prepared by Subcommittee GEL/20/3. It supersedes BS 7655-3.1:1993 which is withdrawn. It specifies harmonized types of PVC insulating compounds in accordance with HD 21.1 S2. This
9、 revision introduces compound type TI 5 in accordance with A14 of HD 21.1 S2. Test methods are specified in this Section of BS 7655 by reference to the latest edition of standards in which they appear. A dated reference to the most recent edition of the relevant standard for each test method is give
10、n in Part 0, which is to be read in conjunction with this Section. 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. Compliance with a British Standard does not of itself confer immunit
11、y from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the
12、inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-3.1:1997 BSI 10-19991 1 Scope This Section of BS 7655 specifies the requirements for the harmonized PVC insulating compounds listed in
13、 Table 1. The relevant test methods are given in BS EN 60811, BS 6469. This Section is to be read in conjunction with BS 7655-0, which contains essential provisions for the application of this Section of BS 7655. Table 1 Types of harmonized PVC insulation 2 References 2.1 Normative references For th
14、e purposes of this Section of BS 7655, the requirements of 2.1 of BS 7655-0 apply with regard to normative references. The latest editions of the standards giving test methods are listed in the most recent edition of BS 7655-0. 2.2 Informative references For the purposes of this Section of BS 7655,
15、the requirements of 2.2 of BS 7655-0 apply with regard to informative references. 3 Definitions For the purposes of this Section of BS 7655 the definitions given in clause 3 of BS 7655-0 apply, together with the following: 3.1 PVC combinations of materials, of which polyvinyl chloride is the charact
16、eristic constituent, suitably selected, proportioned and treated, which meet the requirements given in the particular specification 4 Requirements The requirements specified for each compound listed in Table 2 shall be met when the compound is tested using the test methods listed against each partic
17、ular requirement. NOTEFor cross-references to the latest editions of the test method standards see Table 2 of BS 7655-0. Type Maximum material operating temperature C General application TI 170General purpose TI 270Flexible (including transparent) TI 390Heat resistant TI 470For installation at low t
18、emperatures TI 570General purpose flexible for lower temperature use Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-3.1:1997 2 BSI 10-1999 Table 2 Test requirements TestTest method in accordance with B
19、S EN 60811 unless otherwise stated Test requirements for insulation type SectionClauseTI 1TI 2TI 3TI 4TI 5 Properties in the state as manufactured Minimum tensile strength (N/mm2) Minimum elongation at break (%) 1-19.1 12.5 125 10 150 15 150 12.5 125 10 150 Properties after ageing in air oven Temper
20、ature (C) Duration (h) Minimum tensile strength (N/mm2) Maximum variation (%) Minimum elongation at break (%) Maximum variation (%) 1-28.1 80 2 7 24 12.5 20 125 20 80 2 7 24 10 20 150 20 135 2 14 24 15 25 150 25 80 2 7 24 12.5 20 125 20 80 2 7 24 10 20 150 20 Bending test at low temperature Temperat
21、ure (C) Requirement 1-48.1 15 2 15 2 15 2 40 2 30 2 no cracks Elongation test at low temperature Temperature (C) Minimum elongation without break (%) 1-48.3 15 2 30 15 2 30 a 15 2 20 40 2 30 30 2 30 Impact test at low temperature Temperature (C) Requirement 1-48.5 15 2 15 2 40 2 30 2 no cracksno cra
22、cks Pressure test at high temperature Test conditions Force exerted by the blade Duration of heating under load Temperature (C) Maximum indentation (%) 3-18.1 b b 80 2 50 b b 70 2 50 b b 90 2 50 b b 80 2 50 b b 70 2 50 Resistance to cracking Temperature (C) Requirement 3-19.1150 2 150 2 150 2 150 2
23、150 2 no cracks Loss of mass test Temperature (C) Duration (h) Maximum loss of mass (mg/cm2) 3-28.1 80 2 7 24 2 80 2 7 24 2 115 2 14 24 1.5 80 2 7 24 2 80 2 7 24 2 Minimum thermal stability at (200 0.5) C (min)3-29240 Insulation resistance test Temperature (C) Minimum K value (MAkm) BS 6469-99.2 8 7
24、0 2 2 0.037 70 2 2 0.037 90 2 2 0.037 70 2 2 0.037 70 2 2 0.037 a Currently only applicable for use on national types of cable with mean overall diameters exceeding 12.5 mm. b See BS EN 60811-3-1 Clause 8.2. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:
25、57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-3.1: 1997 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the indepe
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