BS-6091-3.1-1995 IEC-60667-3-1-1986.pdf

BRITISH STANDARD BS 6091-3.1: 1995 IEC 667-3-1: 1986 Vulcanized fibre for electrical purposes Part 3: Specifications for individual materials Section 3.1 Flat sheets (Implementation of HD 416.3.1 S1 1988) UDC 678-41:621.3:6201 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 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 15 November 1995 © BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference GEL/15/3 Draft announced in BSI News April 1995 ISBN 0 580 24785 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/15, Insulating material, to Subcommittee GEL/15/3, Material specifications, upon which the following bodies were represented: Adhesive Tape Manufacturers Association BEAMA Capacitor Manufacturers Association British Rubber Manufacturers Association Ltd. Covered Conductors Association Department of Trade and Industry (National Physical Laboratory) Diamond Fibre Co. Limited ERA Technology Ltd. Mica Trade Club Ministry of Defence Paper Federation of Great Britain Royal Society of Chemistry Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 © BSI 07-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of HD 416.3.1. S13 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 ii © BSI 07-1999 National foreword This Section of BS 6091 has been prepared by Subcommittee GEL/15/13, Insulating material. It is identical with IEC 667-3-1 Specification for vulcanized fibre for electrical purposes Part 3: Specification for individual materials Sheet 1: Flat sheets published by the International Electrotechnical Commission (IEC) and has been endorsed by CENELEC as HD 416.3.1 S1. 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 comprises a front cover, an inside front cover, pages i and ii, the HD title page, pages 2 to 6 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 inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI HARMONIZATION DOCUMENT DOCUMENT DHARMONISATION HARMONISIERUNGSDOKUMENT HD 416.3.1 S1 UDC 678-41:621.3:620.1 Key words: Electrical insulation; vulcanized fibre; flat sheet; specification Specification for vulcanized fibre for electrical purposes Part 3: Specifications for individual materials Sheet One: Flat sheets Spécification pour les fibres vulcanisées à usages électriques Troisième partie: Spécifications pour matériaux individuels Feuille 1: Feuilles planes Bestimmungen für Vulkanfiber für die Elektrotechnik Teil 3: Anforderungen für einzelne Erzeugnisse Blatt 1: Flache Tafeln bzw. Bahnen This Harmonization Document was approved by CENELEC on 1987-12-02. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this Harmonization Document on a national level. Up-to-date lists and bibliographical references concerning national implementation may be obtained on application to the Central Secretariat or to any CENELEC member. This Harmonization Document exists in three official versions (English, French, German). CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1987 Copyright reserved to CENELEC members Ref. No. HD 416.3.1 S1:1987 E Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 © BSI 07-1999 2 Foreword This Harmonization Document was approved by CENELEC on 1987-12-02. The following dates were fixed: Contents Page Foreword2 Introduction3 1Scope3 2Classification3 3Requirements3 Table I Requirements4 latest date of announcement of the HD at national level(doa) 1988-06-01 latest date of publication of a harmonized national standard(dop) 1988-12-01 latest date of withdrawal of conflicting national standards(dow) 1988-12-01 Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 © BSI 07-19993 Introduction This standard is one of a series which deals with vulcanized fibre for electrical purposes. The series will have three parts: Part 1: Definitions and general requirements; Part 2: Methods of test; Part 3: Specifications for individual materials. Part 3 will be presented in the form of separate sheets, each sheet relating to a specific form of material. 1 Scope This sheet specifies requirements for flat vulcanized fibre sheets. This sheet is not applicable to material made by combining with an adhesive several thicknesses of vulcanized fibre sheet. 2 Classification The material shall be classified as Type A, B or C as given in Part 1. 3 Requirements 3.1 The sheets shall comply with the general requirements for quality, finish, etc., given in Part 1. 3.2 When tested by the stipulated method, as given in Part 2, the sheets shall comply with the requirements given in Table I. Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 4 © BSI 07-1999 Table I Requirements Property Method in IEC Publication 667-2 (Clause/Sub-clause) RequirementsRemarks Thickness3.1 Nominal thickness (mm) Tolerances on central value (±, mm) Nominal thickness (mm) Tolerances on central value (±, mm) Tolerance on central value for nominal thicknesses up to and including 1 mm is ± 10 % 1.2 1.5 2.0 2.5 3.0 4.0 5.0 6.0 8.0 0.10 0.15 0.20 0.25 0.25 0.30 0.30 0.30 0.40 9 10 12 16 17.5 20 25 0.40 0.60 0.80 0.80 0.80 1.00 1.00 Nominal thickness Central value (MPa) not less than (mm)Type AType BType C Tensile strength 4 MDaCDbMDaCDbMDaCDb Above 0.8 1.6 2.5 Up to and including 0.8 1.6 2.5 90 80 65 45 45 35 90 90 80 65 45 45 45 35 90 90 80 45 45 45 Flexural stress 7 Flexural stress (MPa)Values applicable to nominal thicknesses 10 mm and above Values for lesser thicknesses are not yet available Type A Type B MDa W 85 W 85 CDb W 75 W 75 Type CNot applicable a MD = machine direction b CD = cross direction Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 © BSI 07-19995 Table I Requirements Property Method in IEC Publication 667-2 (Clause) RequirementsRemarks Bursting strength 11 Method 1 Method 2 For sheets of Types B and C only of nominal thickness up to 0.8 mm. For sheets of Type A the test is not applicable Depth of indentation should be a minimum of 4.5 mm before break occurs Nominal thickness (mm) 0.3 0.4 0.5 0.8 Bursting strength (kPa) W 500 W 1 000 W 1 500 W 2 000 Tearing resistance12 For sheets up to and including 0.8 mm nominal thickness the tearing resistance shall be as below for Types B and C. The test is not applicable to Type A Nominal thickness (mm) Tearing resistance (N) 0.3 0.5 0.8 MDa W 2.0 W 3.0 W 4.0 CDa W 2.5 W 3.5 W 4.5 Density13 Nominal thickness (mm) Minimum permissible density (g/cm3) Above 0.8 6 12 20 Up to and including 0.8 6 12 20 25 Type AType BType C 1.25 1.20 1.15 1.15 1.10 1.10 1.10 1.10 1.15 a MD = machine direction b CD = cross direction Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1:1995 6 © BSI 07-1999 Table 1 Requirements Property Method in IEC Publication 667-2 (Clause) RequirementsRemarks Nominal thickness (mm) Minimum central value (kV/mm) Electric strength15Type AType BType CValues under consideration for the new method included in Part 2 u 0.25 0.25 8 9 8 9 9 9 The test is not applicable to sheets of thickness greater than 3 mm. For sheets of nominal thickness u 0.5 mm the test shall be carried out within 30 s of removal from the desiccator Arc resistance17Under consideration Chloride content18All types not greater than 500 mg/kg Sulphate content19All types not greater than 500 mg/kg Ash content20Type A: not greater than 2 % Types B and C: not greater than 5 % Flexibility21No test piece shall show visible signs of rupture Moisture content22All types not greater than 10 % Internal ply strength 23Type A: not less than 1.8 kN Types B and C: not less than 1.2 kN Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Tue Dec 05 07:14:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6091-3.1: 1995 IEC 667-3-1: 1986 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. 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