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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 7655 : Section 12.2 :
2、1997 IMPORTANT NOTE. This Section of BS 7655 is to be read in conjunction with BS 7655 : Part 0. ICS 29.035.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Insulating and sheathing materials for cables Part 12. Miscellaneous sheathing compounds Section 12.
3、2 Harmonized cross-linked PVC types Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655 : Section 12.2 : 1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector B
4、oard, was published under the authority of the Standards Board and comes into effect on 15 October 1997 BSI 1997 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
5、 580 28371 2 Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/20, Electric cables, to Subcommittee GEL/20/3, Insulation and sheath, upon which the following
6、 bodies were represented: Association of Consulting Engineers British Approvals Service for Cables British Cable Makers Confederation British Plastics Federation British Railways Board British Rubber Manufacturers Association Ltd. British Telecommunications plc Department of Trade and Industry (Cons
7、umer Safety Unit, CA Division) Electricity Association ERATechnology Ltd. GAMBICA (BEAMA Ltd.) London Underground Ltd. Ministry of Defence Queen Mary and Westfield College Telecommunications Cables Group of BCMC Warrington Fire Research Centre Licensed Copy: London South Bank University, London Sout
8、h Bank University, Fri Dec 08 12:02:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655 : Section 12.2 : 1997 BSI 1997i Contents Page Committees responsibleInside front cover Forewordii Specification 1Scope1 2References1 3Definitions1 4Requirements1 Licensed Copy: London South Bank University, Lon
9、don South Bank University, Fri Dec 08 12:02:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1997 BS 7655 : Section 12.2 : 1997 Foreword This Section of BS 7655 has been prepared by Subcommittee GEL/20/3. It specifies harmonized types of cross-linked PVC sheathing compounds. This Section 12.2 in
10、troduces compound type XM 1, in accordance with annex A of HD 22.14 S1. 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 P
11、art 0, which is to be read in conjunction with this Section. 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, pages i and ii, pages 1 and 2, an inside back cover and a back cov
12、er. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 19971 BS 7655 : Section 12.2 : 1997 Specification 1 Scope This Section of BS 7655 specifies the test requirements for the harmonized cross-linked PVC shea
13、thing compound type XM 1. The relevant test methods are given in BS EN 60811. This Section is to be read in conjunction with BS 7655 : Part 0, which contains essential provisions for the application of this Section of BS 7655. 2 References 2.1 Normative references For the purposes of this Section of
14、 BS 7655, the requirements of 2.1 of BS 7655 : Part 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 : Part 0. 2.2 Informative references For the purposes of this Section of BS 7655, the requirement
15、s of 2.2 of BS 7655 : Part 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 : Part 0 apply. 4 Requirements The requirements specified for each compound listed in table 2 shall be met when the compoun
16、d is tested using the test methods listed against each particular requirement. NOTE. For cross-references to the latest editions of the test method standards see table 2 of BS 7655 : Part 0. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:52 GMT+00:00 2006
17、, Uncontrolled Copy, (c) BSI 2 BSI 1997 BS 7655 : Section 12.2 : 1997 Table 1. Test requirements TestTest methods in accordance with BS EN 60811 unless otherwise specified Test requirements for sheath type SectionClauseXM 1 Properties in the state as manufactured1-19.2 Minimum tensile strength (N/mm
18、2)10 Minimum elongation at break (%)150 Properties after ageing in air oven1-28.1 Temperature (C)1002 Duration (h)7 3 24 Minimum tensile strength (N/mm2)10 Maximum variation (%)25 Minimum elongation at break (%)150 Maximum variation (%)20 Bending test at low temperature1-48.2 Temperature (C)2152 Req
19、uirementno cracks Impact test at low temperature1-48.5 Temperature (C)2152 Requirementno cracks Hot set test2-19 Temperature (C)2003 Duration (min)15 Mechanical stress (N/mm2)0.2 Requirements Maximum elongation under load (%)100 Maximum elongation after unloading (%)25 Pressure test at high temperat
20、ure3-18.2 Test conditions Force exerted by the blade 1) Duration of heating under load 1) Temperature (C)902 Maximum indentation (%)50 Resistance to cracking3-19.2 Temperature (C)1502 Requirementno cracks Loss of mass test3-28.2 Temperature (C)1002 Duration (h)7 3 24 Maximum loss of mass (mg/cm2)2 M
21、inimum thermal stability at (2000.5) C (min)3-2960 1) See BS EN 60811-3-1, clause 8.2. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 12:02:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: London South Bank University, London South Bank Univer
22、sity, Fri Dec 08 12:02:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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