BS 5689-3 2-1995 Varnished fabrics for electrical purposes - Specifications for individual materials - Glass fabric based varnished fabrics with epoxy polyurethane silicone polyest.pdf

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1、BRITISH STANDARD BS 5689-3.2: 1995 IEC 394-3-2: 1988 Varnished fabrics for electrical purposes Part 3: Specifications for individual materials Section 3.2 Glass-fabric based varnished fabrics with epoxy, polyurethane, silicone, polyester, bituminous or oleoresinous varnishBS5689-3.2:1995 This Britis

2、h Standard, having been prepared under the directionof the Electrotechnical Sector Board, was published underthe authority of the Standards Board and comesintoeffect on 15December1995 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference GEL/15/3 Draft ann

3、ounced in BSI News, April 1995 ISBN 0 580 24565 9 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, Flexible composites and textiles, upon which the following bodies we

4、re represented: British Narrow Fabrics Association Covered Conductors Association ERA Technology Ltd. Electrical and Electronic Insulation Association (BEAMA Ltd.) Federation of the Electronics Industry Amendments issued since publication Amd. No. Date CommentsBS5689-3.2:1995 BSI 07-1999 i Contents

5、Page Committees responsible Inside front cover National foreword ii Introduction 1 1 Scope 1 2 General requirements 1 3 Tensile strength and extension 1 4 Edge tearing resistance 1 5 Electric strength 1 6 Thermal endurance 1 7 Resistance against hydrolysis 1 8 Effect of fabric on oil 1 9 Effect of o

6、il on varnished fabric 1 Table I Requirements for types PUR/G, EP/G and SI/G 2 Table II Requirements for types PE/G, BT/G and OR/G 3 Table III Thermal endurance requirements 4 List of references Inside back coverBS5689-3.2:1995 ii BSI 07-1999 National foreword This British Standard has been prepared

7、 by Subcommittee GEL/15/3. It isidentical with IEC394-3-2:1988 Varnished fabrics for electrical purposes Part3: Specifications for individual materials Sheet 2: Glass-fabric based varnished fabrics with epoxy, polyurethane, silicone, polyester, bituminous or oleoresinous varnish, published by the In

8、ternational Electrotechnical Commission (IEC). 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 obligat

9、ions. Cross-references International standard Corresponding British Standard IEC 394-2 BS 5689 Varnished fabrics for electrical purposes Part 2:1979 Methods of test BS 5691 Guide for the determination of thermal endurance properties of electrical insulating materials IEC 216-1 Part 1:1979 General pr

10、ocedures for the determination of thermal endurance properties, temperature indices and thermal endurance profiles IEC 216-2 Part 2:1979 Lists of materials and available tests Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1to4, an inside back cover

11、 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.BS5689-3.2:1995 BSI 07-1999 1 Introduction This standard is one of a series which deals with varnished fabrics comp

12、rising bases woven from cotton, natural silk, or synthetic fibres (including glass) supplied in the form of full-width rolls, sheets or tapes slit to various widths. The series consists of three parts: 1. Definitions and general requirements. 2. Methods of test. 3. Specifications for individual mate

13、rials. 1 Scope This part of the standard contains the requirements for glass fabrics with varnishes based on the following resins: epoxy glass-fabric base, EP/G; polyurethane glass-fabric base, PUR/G; silicone glass-fabric base, SI/G; polyester glass-fabric base, PE/G; bituminous glass-fabric base,

14、BT/G; oleoresinous glass-fabric base, OR/G. 2 General requirements The material shall conform to the requirements published in Part1 of the standard. The central values obtained shall be equal to or greater than the values inTable I andTable II. 3 Tensile strength and extension When tested according

15、 to the method described in Part2, the tensile strength, the stress at 10% extension and elongation at break of the material shall be not less than the values given inTable I. 4 Edge tearing resistance When tested according to the method described in Part2, the edge tearing resistance shall be not l

16、ess than that given inTable I. 5 Electric strength 5.1 Electric strength at room temperature When tested according to the method described in Part2, the electric strength at room temperature shall be not less than the values given inTable I. 5.2 Electric strength at elevated temperature When tested

17、according to the method described in Part2, the electric strength at elevated temperature shall be not less than the values given inTable I. 5.3 Electric strength of extended material When tested according to the method described in Part2, the electric strength of extended material shall be not less

18、 than the values given inTable I. 5.4 Electric strength after conditioning at93% r.h. for96h at23 C When tested according to the method described in Part2, the electric strength shall be not less than the values given inTable I when tested at the indicated conditions. 6 Thermal endurance The guidanc

19、e of the IEC Publication216 series has to be observed. Criteria and end points are given inTable III. 7 Resistance against hydrolysis When tested according to the method described in Part2, the material shall show no failure after 24h. 8 Effect of fabric on oil When tested according to the method de

20、scribed in Part2, the acid number shall not be greater than1.0. NOTEThis requirement applies only when not otherwise stated in a relevant contract. 9 Effect of oil on varnished fabric When tested according to the method described in Part2, no tackiness, transfer of varnish or substantial swelling sh

21、all be observed. NOTEThis requirement applies only when not otherwise stated in a relevant contract.BS 5689-3.2:1995 2 BSI 07-1999 Table I Requirements for types PUR/G, EP/G et SI/G Property Test method in Part 2 (Clause) Unit Nominal thickness (mm) 0.10 0.12 0.15 0.20 0.25 Style A a Style B a Style

22、 A a Style B a Style A a Style B a Style A a Style B a Style A a Style B a Thickness tolerance Tensile strength 2 6 mm N/10mm 0.01 0.01 0.012 0.012 0.015 0.015 0.02 0.02 0.025 0.025 Straight cut Min. Min. 90 50 70 40 110 70 90 50 130 80 100 60 180 120 110 70 230 160 120 80 Bias cut Min. Min. 60 20 4

23、0 20 70 25 60 25 80 30 65 30 100 35 70 35 160 35 80 35 Stress at 10% extension 6 N/10mm Bias cut 310 212 311 212 412 315 515 416 618 520 Elongation at break 6 % Straight cut Bias cut Min. Min. 1.5 15 1.5 15 1.5 15 1.5 15 2.0 15 2.0 15 2.5 20 2.5 20 3.0 20 3.0 20 Edge tearing resistance 8 N Straight

24、cut, warp threads torn Bias cut Min. 7 50 5 50 8 70 6 60 10 90 7.5 75 15 110 20 90 30 140 25 120 Electric strength 9 kV at room temperature Min. 4.5 5.0 5.0 6.0 6.0 7.0 7.0 8.0 8.0 9.0 at elevated temperature b PUR/G and EP/G SI/G Min. Min. 2.5 2.0 2.5 2.0 3.0 2.4 3.0 2.5 3.5 2.6 3.5 3.0 4.0 2.8 4.0

25、 3.0 4.0 3.0 4.5 3.5 of 3% extended material for bias cut PUR/G and EP/G for bias cut SI/G Min. Min. 2.5 2.5 3.0 3.0 3.0 2.5 3.0 2.5 3.5 3.0 4.0 3.5 4.0 2.5 6.0 3.5 4.5 2.5 5.0 3.5 after conditioning 93% r.h. for PUR/G and EP/G for SI/G Min. Min. 2.1 1.8 2.5 2.0 2.2 2.0 2.5 2.2 2.3 2.5 3.0 2.8 2.4 2

26、.8 2.8 3.0 2.5 3.0 3.0 3.5 a All requirements for a particular fabric are to be taken from one column, either A or B. Columns A and B reflect differences in properties dependent on variations in style of the base. Fabrics used in Astyles are generally woven from coarser yarn than in Bstyles and are

27、usually characterized by more open-weave construction. b Elevated temperature for PUR/G=140 C, EP/G=150 C, SI/G=180 C. warp direction weft direction normal jointBS 5689-3.2:1995 BSI 07-1999 3 Table II Requirements for types PE/G, BT/G and OR/G Property Test method in Part 2 (Clause) Unit Nominal thi

28、ckness (mm) 0.10 0.12 0.15 0.20 0.25 Style A a Style B a Style A a Style B a Style A a Style B a Style A a Style B a Style A a Style B a Thickness tolerance 2 mm 0.01 0.01 0.012 0.012 0.015 0.015 0.02 0.02 0.025 0.025 Tensile strength 6 N/10mm Straight cut Min. Min. 90 50 70 40 110 70 90 50 130 80 1

29、00 60 180 120 110 70 230 160 120 80 Bias cut Min. Min. 60 20 40 20 70 25 60 25 80 30 65 30 100 35 70 35 160 35 80 35 Stress at 10% extension 6 N/10mm Bias cut 310 212 311 212 412 315 515 416 618 520 Elongation at break 6 % Straight cut Min. 1.5 1.5 1.5 1.5 2.0 2.0 2.5 2.5 3.0 3.0 Bias cut Min. 15 15

30、 15 15 15 15 20 20 20 20 Edge tearing resistance 8 N Straight cut, Warp threads torn Min. 7 5 8 6 10 7.5 15 20 30 25 Bias cut Min. 50 50 70 60 90 75 110 90 140 120 Electric strength 9 kV at room temperature Min. 4.5 5.0 5.0 6.0 6.0 7.0 7.0 8.0 8.0 9.0 at elevated temperature b Min. 2.0 2.5 2.5 3.0 3

31、.0 3.5 3.5 4.0 4.0 4.5 of 3% extended bias cut material Min. 2.5 3.0 2.5 3.0 3.0 3.5 3.5 4.0 4.0 4.5 after conditioning 93% r.h. Min. 2.0 2.5 2.5 3.0 3.0 3.5 3.5 4.0 4.0 4.5 a All requirements for a particular fabric are to be taken from one column, either A or B. Columns A and B reflect differences

32、 in properties dependent on variations in style of the base. Fabrics used in Astyles are generally woven from coarser yarn than in Bstyles and are usually characterized by more open-weave construction. b Elevated temperature for PE/G=155 C, BT/G=105 C, OR/G=120 C. warp direction weft direction norma

33、l jointBS5689-3.2:1995 4 BSI 07-1999 Table III Thermal endurance requirements Property Type of fabric PUR/G EP/G SI/G OR/G BT/G PE/G Style Aand B Style A Style B Style AandB Style Aand B Style Aand B Style Aand B Thermal endurance Temperature index based on breakdown voltage with curved electrode (I

34、ECPublication370) and50% end-point Min.130 Min.130 Min.155 Min.155 Min.120 Min.105 Min.155BS5689-3.2:1995 BSI 07-1999 List of references See national foreword.BS 5689-3.2: 1995 IEC 394-3-2: 1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national b

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