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1、BRITISH STANDARD BS 7655-1.5: 1993 Specification for Insulating and sheathing materials for cables Part 1: Elastomeric insulating compounds Section 1.5 Flame retardant composites Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontroll
2、ed Copy, (c) BSI BS 7655-1.5:1993 This British Standard, having been prepared under the direction of the Cables and Insulation Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 April 1993 BSI 02-1999 The following BSI references relate t
3、o the work on this standard: Committee reference CIL/20 Draft for comment 92/25662 DC ISBN 0 580 22011 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Cables and Insulation Standards Policy Committee (CIL/-) to Technical Committee CIL/
4、20, upon which the following bodies were represented: Aluminium Federation Association of Consulting Engineers Association of Manufacturers of Domestic Electrical Appliances British Approvals Service for Cables British Cable Makers Confederation British Plastics Federation British Steel Industry Dep
5、artment of the Environment (Property Services Agency) Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association Engineering Equipment and Materials Users Association Institution of Electrical Engineers London Regional Transport The following bodies were also repres
6、ented in the drafting of the standard, through subcommittees and panels: British Railways Board British Rubber Manufacturers Association Ltd. British Telecommunications plc ERA Technology Ltd. GAMBICA (BEAMA Ltd.) Institution of Incorporated Executive Engineers London Underground Ltd. Queen Mary and
7、 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 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-1.5:19
8、93 BSI 02-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Normative references1 3Definitions1 4General description1 5Test requirements for physical and electrical properties1 Table 1 Types of flame retardant elastomeric insulation1 Table 2 Test methods (in accordance
9、 with BS 6469 unless otherwise stated)2 Table 3 Test requirements3 Table 4 Tolerances on temperature values4 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-1.5:1993
10、ii BSI 02-1999 Foreword This Section of BS 7655 has been prepared under the direction of the Cables and Insulation Standards Policy Committee. This Section specifies the physical and electrical properties of flame retardant composite elastomeric insulating compounds. For a general introduction to th
11、e BS 7655 series and a list of Parts and Sections, Part 0 should be consulted. 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 co
12、nfer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicat
13、ed in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-1.5:1993 BSI 02-19991 1 Scope This Section of BS 7655 specifies the physical and electrical propertie
14、s of flame retardant composite elastomeric insulating compounds given in Table 1. The relevant test methods for verification of conformity are given in BS 6469. These compounds are for use on coil end leads conforming to BS 6195 but may be used for other suitable applications as detailed in the cabl
15、e specification. This Section is to be used in conjunction with BS 7655-0. Table 1 Types of flame retardant elastomeric insulation 2 Normative references This Section of BS 7655 incorporates by dated or undated reference, provisions from other publications. These normative references are cited at th
16、e appropriate places in the text and the publications are listed on the inside back page. For a dated reference, only the edition cited applies; any subsequent amendments to or revisions of the publication apply to this British Standard only when incorporated in the reference by amendment or revisio
17、n. For undated references, any amendment to, or the latest edition of, the cited publication applies. 3 Definitions For the purposes of this Section of BS 7655, the definitions given in BS 1755-1, BS 1755-2, BS 3558 and BS 4727-2:Group 08 apply, together with the following. 3.1 variation the differe
18、nce between the median value after ageing and the median value without ageing expressed as a percentage of the latter 3.2 median value when several test results have been obtained and ordered in an increasing or decreasing succession, the median is the middle value if the number of available values
19、is odd and is the mean of the two middle values if the number is even 4 General description The insulation shall consist of an inner layer of type GP 4 or GP 5 specified in BS 7655-1.2 and a closely adherent outer layer conforming to the physical requirements of type OR 1 specified in BS 7655-1.4 fo
20、rmulated and vulcanized so as to conform to the performance requirements of this Section. 5 Test requirements for physical and electrical properties 5.1 General 5.1.1 The test methods shall be as specified in Table 2 and the methods of sampling and pre-conditioning shall be as described in 5.2 and 5
21、.3. The temperatures used for the test methods shall conform to the conditions specified in 5.4. 5.1.2 When tested by the methods specified in 5.1.1 the properties shall be in accordance with the requirements given in Table 3 for the particular type of material. For samples having insulation thickne
22、sses greater than 2.5 mm, the layers after separation shall be tested as indicated in Table 3. 5.2 Sampling Unless otherwise stated in the British Standard for the particular cable, the tests on insulation shall be made on samples from each core if the cable has one, two or three cores and on sample
23、s from three cores (of differing colours if any) if the cable has more than three cores. 5.3 Pre-conditioning The tests shall be carried out not less than 16 h after extrusion and cross-linking. 5.4 Temperatures for test methods 5.4.1 Ambient temperature Tests shall be made at an ambient temperature
24、 within the range 5 C to 35 C unless otherwise specified in the details for the particular test. 5.4.2 Tolerances on temperature values Unless otherwise stated in the particular specification, the tolerances on temperature values quoted in the test methods shall be as given in Table 4. Type Maximum
25、material operating temperature C General application FR 185Flame retardant compositea FR 285Flame retardant compositea a The voltage designation of the cable may have a bearing on the type of compound selected for a particular application. Licensed Copy: London South Bank University, London South Ba
26、nk University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-1.5:1993 2 BSI 02-1999 Table 2 Test methods (in accordance with BS 6469 unless otherwise stated) TestMethod SectionClause Properties in the state as delivered 1.1:19929 Tensile strength and elongation at break Prop
27、erties after ageing in air oven 1.2:19928.1 Tensile strength and elongation at break Properties after ageing in air bomb 1.2:19928.2 Tensile strength and elongation at break Ozone resistance test1.1:19928.1 Alternative ozone resistance test (low concentration) 99.1:199213 Mineral oil immersion test
28、2.1:199210 Insulation resistance constant 99.2:19928 Power factor and permittivity test 99.2:19929 Water absorption determined by the capacitance method 99.2:199210 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) B
29、SI BS 7655-1.5:1993 BSI 02-19993 Table 3 Test requirements TestRequirements for insulation type FR IFR 2 Properties in the state as delivered for thicknesses up to and including 2.5 mm Minimum tensile strength N/mm2 5.55.5 Minimum elongation at break%200200 Properties in the state as delivered for t
30、hicknesses over 2.5 mm (inner layer) Minimum tensile strength N/mm2 6.56.5 Minimum elongation at break%200200 Properties in the state as delivered for thicknesses over 2.5 mm (outer layer) Minimum tensile strength N/mm2 77 Minimum elongation at break%200200 Properties after ageing in air oven for th
31、icknesses up to and including 2.5 mm TemperatureC120120 Durationh7 247 24 Maximum variation for tensile strength%3030 Maximum variation for elongation at break%4040 Properties after ageing in air bomb for thicknesses up to and including 2.5 mm TemperatureC127127 Durationh4040 Maximum variation for t
32、ensile strengtha %5050 Maximum variation for elongation at breaka %5050 Properties after ageing in air bomb for thicknesses over 2.5 mm (inner layer) TemperatureC127127 Durationh4040 Maximum variation for tensile strength%3030 Maximum variation for elongation at break%3030 Properties after ageing in
33、 air bomb for thicknesses over 2.5 mm (outer layer) TemperatureC127127 Durationh4040 Maximum variation for tensile strengtha %5050 Maximum variation for elongation at breaka %5050 Ozone resistance TemperatureC25 Durationh3 Ozone concentrationppm250 to 300 Requirementno cracks Licensed Copy: London S
34、outh Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-1.5:1993 4 BSI 02-1999 Table 3 Test requirements Table 4 Tolerances on temperature values TestRequirements for insulation type FR IFR 2 Alternative ozone resistance test (low co
35、ncentration) TemperatureC40 Durationh8 Ozone concentrationppm200 50 Requirementno cracks Mineral oil immersion test for thicknesses over 2.5 mm (outer layer) TemperatureC100100 Durationh2424 Maximum variation for tensile strengtha %4040 Maximum variation for elongation at breaka %4040 Insulation res
36、istance constant Minimum K value at 20 CM7.km1 9003 700 Power factor and permittivity test Maximum power factor at 20 C0.035 Maximum permittivity at 20 C5.5 Water absorption determined by the capacitance method Maximum increase in capacitance 1 to 14 days%1510 7 to 14 days%53 a Only a reduction in v
37、alues is subject to verification. Specified temperature, tTolerance CC 40 #t#0 2 0 150 3 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7655-1.5:1993 BSI 02-1999 List of references (see clause 2) Normative
38、references BSI standards publications BRITISH STANDARDS INSTITUTION, London BS 1755, Glossary of terms used in the plastics industry. BS 1755-1:1982, Polymer and plastics technology. BS 1755-2:1974, Manufacturing processes. BS 3558:1980, Glossary of rubber terms. BS 4727, Glossary of electrotechnica
39、l, power, telecommunication, electronics, lighting and colour terms. BS 4727-2, Terms particular to power engineering. BS 4727-2:Group 08:1986, Electric cable terminology. BS 6195:1993, Specification for insulated flexible cables and cords for coil leads. BS 6469, Common test methods for insulating
40、and sheathing materials of electric cables. BS 6469-1, Methods for general application. BS 6469-1.1:1992, Measurement of thickness and overall dimensions Test for determining the mechanical properties. BS 6469-1.2:1992, Thermal ageing methods. BS 6469-2, Methods specific to elastomeric compounds. BS
41、 6469-2.1:1992, Ozone resistance test Hot set test Mineral oil immersion test. BS 6469-99, Test methods used in the United Kingdom but not specified in Parts 1 to 5. BS 6469-99.1:1992, Non-electrical tests. BS 6469-99.2:1992, Electrical tests. BS 7655, Specification for insulating and sheathing mate
42、rials for cables. BS 7655-0:1993, General introduction. BS 7655-1, Elastomeric insulating compounds. BS 7655-1.2:1993, General 90 C application. BS 7655-1.4:1993, Oil resisting types. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 11:55:02 GMT+00:00 2006, Uncon
43、trolled Copy, (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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