1、BRITISH STANDARD BS6091-1: 1981 IEC667-1: 1980 Vulcanized fibre for electrical purposes Part1: Specification of general requirements IEC title: Specification for vulcanized fibre for electrical purposes Part1 Definitions and general requirements UDC 621.315.616.92:678.542.7BS6091-1:1981 This British
2、 Standard, having been prepared under the directionof the General Electrotechnical Engineering Standards Committee, was published under the authority ofthe Executive Board and comes into effect on 27 February 1981 BSI 05-1999 The following BSI references relate to the work on this standard: Committe
3、e reference GEL/16 Draft for comment78/31124DC ISBN 0 580 1 1888 6 Cooperating organizations The General Electrotechnical Engineering Standards Committee, under whose direction this British Standard was prepared, consists of representatives from the following: Associated Offices Technical Committee
4、British Approvals Service for Electric Cables Ltd. British Electrical and Allied Manufacturers Association, (BEAMA) British Radio Equipment Manufacturers Association Cbmpe Department of Energy (Electricity) Electric Cable Makers Confederation Electrical Contractors Association Electrical Contractors
5、 Association of Scotland Electricity Supply Industry in England and Wales Electronic Components Industry Federation Electronic Engineering Association Engineering Equipment Users Association Era Technology Ltd.* Health and Safety Executive Home Office Institution of Electrical Engineers Ministry of
6、Defence* National Coal Board Oil Companies Materials Association Post Office Telecommunication Engineering and Manufacturing Association (TEMA) The organizations marked with an asterisk in the above list, together with the following, were directly represented on the Technical Committee entrusted wit
7、h the preparation of this British Standard: British Paper and Board Industry Federation (PIF) Electrical and Electronic and Insulation Association (BEAMA) Amendments issued since publication Amd. No. Date of issue CommentsBS6091-1:1981 BSI 05-1999 i Contents Page Cooperating organizations Inside fro
8、nt cover National foreword ii Introduction 1 1 Scope 1 2 Definitions 1 3 Classification 1 4 Forms and colours 1 5 General requirements 1 6 Geometric requirements 1 7 Conditions of supply 2 Table I 2BS6091-1:1981 ii BSI 05-1999 National foreword This Part of this British Standard has been prepared un
9、der the direction of the General Electrotechnical Engineering Standards Committee and is identical with IEC Publication667-1:1980 “Specification for vulcanized fibre for electrical purposes Part1: Definitions and general requirements”, published by the International Electrotechnical Commission (IEC)
10、. It is the intention that BS6091 will ultimately replace BS216:1961 “Vulcanized fibre sheet for electrical purposes” and BS934:1940 “Vulcanized fibre (natural colour) rods and tubes for electrical purposes”. A decision on the withdrawal of those standards will be taken at an appropriate stage in th
11、e publication of Part3 “Specification for individual materials” of this British Standard. Terminology and conventions. The text of the international standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identi
12、cal with those used in British Standards; attention is especially drawn to the following. Where, in the introduction, the words “standard is one of a series which” appear, they should be read as “Part of this British Standard”. In the second sentence of the introduction, the word “series” should be
13、read as “British Standard”. Additional information. The scope of the international standard covers all Parts of this standard and it should be understood that Part1 of this British Standard is limited as indicated by its title to the specification of general requirements for the materials described
14、in clause1. The “note” at the end of clause4 should be read as part of the clause. Cross-references. In the introduction, the parts of the international standard that are referred to, namely “2. Methods of test.” and “3. Specification requirements for individual materials.” are IEC667-2 1)and IEC667
15、-3 1) , when they are published consideration will be given to issuing them without deviation as BS6091-2 and BS6091-3 respectively. 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. Co
16、mpliance 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, pages1and2 and a back cover. This standard has been updated (see copyright date) and may have had amendments inco
17、rporated. This will be indicated in the amendment table on theinside front cover. 1) In course of preparation.BS6091-1:1981 BSI 05-1999 1 Introduction This standard is one of a series which deals with vulcanized fibre for use in electrical equipment. The series will have three parts: Part1: Definiti
18、ons and general requirements; Part2: Methods of test; Part3: Specification requirements for individual materials. 1 Scope This standard covers vulcanized fibre sheets, flat or corrugated, round rods and round tubes suitable for use as electrical insulation. Material made by combining with an adhesiv
19、e several thicknesses of vulcanized fibre is not covered by this standard. 2 Definitions 2.1 vulcanized fibre superimposed layers of specially prepared paper, chemically treated (gelatinized) so that the laminae are virtually destroyed, with the production of a homogeneous mass of converted cellulos
20、e which will not delaminate after30min immersion in boiling water. It is supplied in the form of rolls, sheets, tubes or rods 2.2 full width rolls vulcanized fibre up to and including2.5mm thick in roll form in the full width of the machine 3 Classification 3.1 Type A This type is characterized by g
21、reater hardness and stiffness associated with higher density. It machines more smoothly and with less tendency to separate the plies in difficult machining operations than the other types. Sheets are available in the limited thickness range of0.8mm to12mm. 3.2 Type B This type is considered as the g
22、eneral purpose type. It possesses good physical and electrical properties and can be fabricated satisfactorily by punching. 3.3 Type C This type is intended primarily for applications involving difficult bending or forming operations. It is available in sheet and roll form only and in thicknesses fr
23、om0.1mm to2.5mm (this type is often referred to as leatheroid, or fishpaper). 4 Forms and colours Unless otherwise specified the material shall be supplied in the natural or grey form. The colours in which the material is normally supplied are in natural grey, black or red. In any of these colours c
24、onsiderable variation in the shades may be expected from batch to batch. NOTEAll types may be supplied in any agreed shape, for example channels. When the basic materials are used they shall comply with the requirements of this standard. 5 General requirements 5.1 Quality The material shall be unifo
25、rm in quality, consistent with the properties prescribed in specifications for individual materials (Part3). It shall be free from blisters, cracks and be reasonably free from wrinkles, scratches and dents. 5.2 Finish Sheets shall be uniformly finished with a smooth matt surface and shall be free fr
26、om distortion and splitting along the edge. Sheets shall be free from internal fractures and, when specified, shall be trimmed with square edges. Rods and tubes shall be uniformly and smoothly finished and shall be free from twisting, splitting, and excessive warping. Rods and tubes shall be supplie
27、d with the ends trimmed at right angles to the length. 6 Geometric requirements 6.1 Preferred thicknesses of sheets The preferred thicknesses of the sheets are as follows: 0.10,0.12,0.15,0.20,0.25,0.30,0.40,0.50,0.60, 0.80, 1.0,1.2,1.5,2.0,2.5,3.0,4.0,5.0,6.0, 8.0,10.0,12.0,16.0,20.0,25.0,30.0,40.0,
28、50.0mm. 6.2 Width of sheets Full width sheets or rolls are normally between1000mm and1400mm wide. Smaller widths may also be obtained. 6.3 Length of sheets The full length of sheets is normally between1650mm and2300mm. 6.4 Mass and dimension of rolls 6.4.1 Sheets under0.8mm in thickness may be suppl
29、ied on cardboard rolls75mm internal diameter in rolls up to200kg in mass and450mm in outside diameter.BS6091-1:1981 2 BSI 05-1999 6.4.2 Sheets of0.8mm thickness and over may be supplied in300mm internal diameter centreless rolls up to500kg in mass and600mm outside diameter. 6.5 Dimension of rods The
30、 preferred diameter of rods are as follows: 5.0,6.0,8.0,10.0,12.0,16.0,20.0,25.0,30.0,40.0, 50.0mm. 6.6 Wall thickness of tubes The wall thickness of tubes shall be according to Table I. 7 Conditions of supply The material shall be supplied in a packing which ensures adequate protection during trans
31、port, handling, and storage. The following information shall be given on each package: 1) The specification to which the material is supplied. 2) The type, and colour. 3) The dimensions of the material supplied. 4) The mass of each package. Table I Nominal internal diameter Nominal wall thickness (m
32、m) (mm) Above Up to and including Min. Max. 5 0.5 3.0 5 6 0.5 6.0 6 17 0.8 6.0 17 30 0.8 7.0 30 35 1.6 7.0 35 80 1.6 8.0 80 and over 3.2 8.0blankBS6091-1: 1981 IEC667-1: 1980 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for
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