BS 7655-2 3-2000 Specification for insulating and sheathing materials for cables - Elastomeric sheathing compounds - General application - General application《电缆用绝缘和铠装材料规范 弹性铠装化合物 .pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7655-2.3:2000 ICS 29.0

2、35.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Insulating and sheathing materials for cables Part 2: Cross-linked elastomeric sheathing compounds Section 2.3: General application IMPORTANT NOTE This section of BS 7655 is to be read in conjunction with

3、BS 7655-0.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 November 2000 BSI 11-2000 First published April 1993 Second edition November 2000 The following

4、 BSI references relate to the work on this standard: Committee reference GEL/20/3 Draft for comment 99/240495 DC ISBN 0 580 33193 8 BS 7655-2.3:2000 Amendments issued since publication Amd. No. Date Comments Committees responsible for this British Standard The preparation of this British Standard wa

5、s 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 Cables Association British Plastics Federation British Rubbe

6、r Manufacturers Association Ltd. Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association ERA Technology Ltd. GAMBICA (BEAMA Ltd.) Institute of Fire Prevention Officers London Underground Ltd. Ministry of Defence Queen Mary and Westfield College Railtrack Warringt

7、on Fire Research CentreBS 7655-2.3:2000 BSI 11-2000 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Requirements 1 Bibliography 3ii BSI 11-2000 BS 7655-2.3:2000 Foreword This section of BS 7655 has been prepared by Subcommitt

8、ee GEL/20/3. It supersedes BS 7655-2.3:1993 which is withdrawn. It specifies the requirements for general application cross-linked elastomeric sheathing compounds. This revision brings this section of BS 7655 fully into line with BS 7655-0:1997, including amendment 1:2000. Additionally type RS 1 is

9、withdrawn. 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 given in BS 7655-0, which is to be read in conjunction with this sectio

10、n. 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 immunity from legal obligations. Summary of pages This document compris

11、es a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 7655-2.3:2000 BSI 11-2000 1 1 Scope This section of BS 7655 specifies the requirements for the general applicatio

12、n cross-linked elastomeric sheathing compounds listed in Table 1. The relevant test methods are given in BS EN 60811 and 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 cross-linke

13、d elastomeric sheathing compounds for general application Type Maximum material operating temperature General application 8C RS 2 60 Heavy duty oil-resisting and flame retardant RS 3 85 Ordinary duty oil-resisting and flame retardant RS 4 85 Heavy duty oil-resisting and flame retardant RS 6 60 Heavy

14、 duty oil-resisting and flame retardant with increased tear resistance 2 Normative references For the purposes of this section of BS 7655, the requirements of BS 7655-0, 2.1 apply with regard to normative references. The latest editions of the standards giving test methods are listed in the most rec

15、ent edition of BS 7655-0. 3 Definitions For the purposes of this section of BS 7655 the definitions given in BS 7655-0, clause 3 apply. 4 Requirements The requirements specified for the compounds listed in Table 2 shall be met when the compound is tested using the test methods listed against each pa

16、rticular requirement. NOTE For cross-references to the latest editions of the test method standards see BS 7655-0, Table 2.2 BSI 11-2000 BS 7655-2.3:2000 Table 2 Test requirements Test Test method in accordance with BS EN 60811 unless otherwise stated Requirements for compound type Section Clause RS

17、 2 RS 3 RS 4 RS 6 Properties in the state as manufactured 1-1 9.2 Minimum tensile strength (N/mm 2 ) 11 8 11 11 Minimum elongation at break (%) 250 250 250 250 Test for tear resistance BS 6469-99.1, clause 9 Minimum value (N/mm) 5 7.5 Properties after ageing in air oven 1-2 8.1.3.1 Temperature (8C)

18、70 2 120 2 120 27 0 2 Duration (h) 103 24 73 24 73 24 103 24 Maximum variation for tensile strength (%) 15 1) 30 30 15 1) Minimum elongation at break (%) 200 250 Maximum variation for elongation at break (%) 25 1) 40 40 25 1) Properties after ageing in air bomb 1-2 8.2 Temperature (8C) 127 2 127 2 D

19、uration (h) 40 40 Maximum variation for tensile strength (%) 50 1) 50 1) Maximum variation for elongation at break (%) 50 1) 50 1) Hot set test 2-1 9 Temperature (8C) 200 3 200 3 200 3 200 3 Duration (min) 15 15 15 15 Mechanical stress (N/mm 2 ) 0.2 0.2 0.2 0.2 Requirements Maximum elongation under

20、load (%) 100 100 100 100 Maximum elongation after unloading (%) 25 25 25 25 Mineral oil immersion test 2-1 10 Temperature (8C) 100 2 100 2 100 2 100 2 Duration (h) 24 24 24 24 Maximum variation for tensile strength (%) 40 40 40 40 Maximum variation for elongation at break (%) 40 40 40 40 1) Only a r

21、eduction in values is subject to verification. BSI 11-2000 3 BS 7655-2.3:2000 Bibliography See BS 7655-0, 2.2.BS 7655-2.3:2000 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

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