BS EN 60674-3-2-1995 Specification for plastic films for electrical purposes - Specifications for individual materials - Requirements for balanced biaxially oriented polyethylene tu.pdf

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1、BRITISH STANDARD BS EN 60674-3-2:1998 Incorporating Amendment No. 1 to BS7290-3.2:1995 (renumbers the BS as BSEN60674-3-2: 1998) Specification for plastic films for electrical purposes Part 3: Specifications for individual materials Sheet 2: Requirements for balanced biaxially oriented polyethylene

2、terephthalate (PET) films used for electrical insulation The European Standard EN 60674-3-2:1998 has the status of a British Standard ICS 29.035.20BSEN60674-3-2:1998 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authorit

3、y of the Standards Board and comes into effect on 15 July 1995 BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference GEL/15 Special announcement in BSI News April 1995 ISBN 0 580 24330 3 Committees responsible for this British Standard The preparation of t

4、his 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 A

5、ssociation 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. Da

6、te Comments 10107 October 1998 New front cover and addition of European title page and foreword, and consequent changes to national forewordBSEN60674-3-2:1998 BSI 05-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 1 General 3 2 Designation 3 3 General r

7、equirements 3 4 Dimensions 3 5 Properties 4 6 Roll characteristics for all types 6 Annex ZA (normative) Normative references to international publications with their corresponding European publications 7 Table 1 Property requirements for all types 4 Table 2 Properties dependent on thickness 5 Table

8、3 Electric strength (a.c. test) for all types 5 Table 4 Electric strength (d.c. test) type 2 only 5 Table 5 Number of faults counted 5 Table 6 Windability 6 Table 7 Maximum permissible number of joins or breaks per roll 6 Table 8 Film width 6 List of references Inside back coverBSEN60674-3-2:1998 ii

9、 BSI 05-1999 National foreword This British Standard has been prepared by Subcommittee GEL/15/3 and is the English language version of EN60674-3-2 Specification for plastic films for electrical purposes Part 3: Specifications for individual materials Sheet 2: Requirements for balanced biaxially orie

10、nted polyethylene terephthalate (PET) films used for electrical insulation, published by the European Committee for Standardization (CEN). It is identical with IEC60674-3-2:1992, published by the International Electrotechnical Commission (IEC). A British Standard does not purport to include all the

11、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. Cross-references Publication referred to Corresponding British Standard IEC 674-1:1980 BS EN 606

12、74-1:1998 Specification for plastic films for electrical purposes Part 1: Definitions and general requirements IEC 674-2:1998 BS EN 60674-2:1998 Specification for plastic films for electrical purposes Part 2: Methods of test IEC 757:1983 BS 7645:1993 Code for designation of colours Summary of pages

13、This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2to8, 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 indicated in the amendment table on the inside fr

14、ont cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60674-3-2 April 1998 ICS 29.035.20 Descriptors: Electrical insulating materials, solid electrical insulating materials, insulating films, plastic films, polyethylene terephthalate, specifications English version Specification for plastic

15、 films for electrical purposes Part 3: Specifications for individual materials Sheet 2: Requirements for balanced biaxially oriented polyethylene terephthalate (PET) films used for electrical insulation (IEC 60674-3-2:1992) Spcification pour les films en matire plastique usages lectriques Partie 3:

16、Spcifications pour matriaux particuliers Feuille 2: Prescriptions pour les films de polythylne-trphtalate (PET), orientation biaxe quilibre, utiliss dans lisolation lectrique (CEI 60674-3-2:1992) Bestimmung fr Isolierfolien fr elektrotechnische Zwecke Teil 3: Anforderungen fr einzelne Werkstoffe Bla

17、tt 2: Anforderungen an isotrop biaxial orientierte Polyethylenterephthalat-(PET)-Folien zur elektrischen Isolierung (IEC60674-3-2:1992) This European Standard was approved by CENELEC on 1998-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the cond

18、itions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in t

19、hree official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechn

20、ical committees of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisat

21、ion Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60674-3-2:1998 EEN60674-3-2:1998 BSI 05-1999 2 Forew

22、ord The text of the International Standard IEC60674-3-2:1992, prepared by SC15C, Specifications, of IECTC15, Insulating materials, was submitted to the formal vote and was approved by CENELEC as EN60674-3-2 on 1998-04-01 without any modification. The following dates were fixed: Annexes designated “n

23、ormative” are part of the body of the standard. In this standard, Annex ZA is normative. Annex ZA has been added by CENELEC. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-12-01 latest date by which th

24、e national standards conflicting with the EN have to be withdrawn (dow) 1998-12-01BS EN60674-3-2:1998 BSI 05-1999 3 1 General 1.1 Scope This International Standard gives the requirements for balanced biaxially oriented polyethylene terephthalate (PET) film for use as electrical insulation. 1.2 Norma

25、tive references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements

26、based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 674-1:1980, Specification for plastic films fo

27、r electrical purposes Part 1: Definitions and general requirements. IEC 674-2:1988, Specification for plastic films for electrical purposes Part 2: Methods of test. IEC 757:1983, Code for designation of colour. 1.3 Classification The PET film shall be of the following types: Type 1: General purpose

28、Type 2: For use as the dielectric of capacitors. 2 Designation The plastic film shall be identified by the following designation: Designation of the film IEC 674-3-2 PET type thickness in micrometres width in millimetres length in metres colour. Example: Polyethylene terephthalate IEC674-3-2 PET typ

29、e 1 100 20 200 nc (nc = natural colour; other colours according to IEC757). 3 General requirements The material shall be made from polyethylene terephthalate; it shall be biaxially oriented with an approximately balanced orientation and shall conform to the requirements laid down in part1 of IEC674.

30、 For certain applications additives to the base material may be present (e.g. pigments, dyes). Where such additives are included, they shall not affect the requirements for any of the properties listed for that type unless otherwise specified. 4 Dimensions 4.1 Thickness The film thickness shall be m

31、easured by a gravimetric method in accordance with the requirements of3.3 ofIEC674-2. NOTEThere are no requirements for thickness in this standard but preferred thicknesses are as follows: 2, 3, 3, 5, 5, 6, 8, 10, 12, 15, 19, 23, 36, 50, 75, 100, 125, 190, 250, 300, 350m. The thickness tolerance sha

32、ll comply with the requirements in4.1 of IEC674-1 unless otherwise specified in the purchase contract. 4.2 Width The film width shall be measured in accordance with the requirements of clause5 of IEC674-2. Preferred widths cannot be given on account of the great variety of applications. The toleranc

33、e on the width shall comply with the requirements of 4.2 of IEC674-1 except for slot closure applications where on a width of less than 25mm, a tolerance of mm is specified as an alternative. 0 0,3BSEN60674-3-2:1998 4 BSI 05-1999 5 Properties 5.1 Properties not dependent on thickness Table 1 Propert

34、y requirements for all types Property Requirements Units IEC 674-2 Test method Subclause Type Density normal 1390 10 kg/m 3 4, Method D a 1 and 2 Density for opaque pigmented film 1400 10 Melting-point Under consideration Permittivity 3,3 0,2 16.1 (23C, 1kHz) b 1 and 2 Dissipation factor10 14 7 m 15

35、 c 1 10 15 2 Surface resistivity 10 13 7 14 c 1 10 14 2 Electrolytic corrosion A1 21 Visual test 1 and 2 2 % 21 Tensile wire test Dimensional stability with rising temperature $ 200 24 1 under tension C under pressure $ 200 25 1 a This method is only suitable for film thicknesses above 12m. The reco

36、mmended mixture is tetrachloromethane/n-heptane. For film 10m and 10V for thicknesses 10m.BS EN60674-3-2:1998 BSI 05-1999 5 5.2 Properties dependent on thickness Table 2 Properties dependent on thickness Table 3 Electric strength (a.c. test) for all types Table 4 Electric strength (d.c. test) type2

37、only Electrical weak spots (type 2 only) When measured according to 19.3 of IEC674-2 with a test voltage of 200V/m based on the nominal thickness of the film, the number of faults counted shall not exceed the numbers given inTable 5. Table 5 Number of faults counted Property Requirements Units IEC 6

38、74-2 Test method Subclause Type15 100 250m Tensile strength (either direction) Minimum value 170 a 150 140 110 MPa 10 b 1 and 2 Elongation at break (either direction) Minimum value 50 a 80 80 80 % 10 b 1 and 2 Dimensional change (shrinkage either direction) 3,5 3,0 3,0 2,0 % 23 (150C, 15min) 1 and 2

39、 Electric strength SeeTable 3 andTable 4 18.1 a.c. c 18.2 d.c. c 1 and 2 2 Electrical weak spots SeeTable 5 19.3 2 a No requirement for film thicknesses below 5m. b Rate of extension 100mm/min, reference lines 100mm apart. c Method to use 6mm diameter electrodes. For materials of thicknesses 100m or

40、 less, tests shall be made in air using a rate of rise of voltage of 500V/s. For materials thicker than 100m, tests shall be made in transformer oil. Nominal thickness Minimum electric strength IEC 674-2 Test method Subclause m V/m 6 8 10 12 15 19 23 36 50 75 100 210 208 200 190 174 150 130 105 90 1

41、8.1 Using 6mm diameter electrodes in air 125 190 250 350 80 65 60 50 18.1 Using 6mm diameter electrodes in transformer oil Nominal thickness Minimum breakdown voltage Central value Not more than two of the 21results shall be below Not more than one of the 21results shall be below m V V V 6 8 10 12 1

42、5 19 23 1500 2000 2400 2800 3200 3400 4000 600 1100 1500 1800 2000 2200 2500 400 550 800 1000 1600 1900 2200 Nominal thickness Fault count/m 2 m 3 3,5 5 6 8 10 12 and above 6 4 2 1 0,8 0,4 0,2BSEN60674-3-2:1998 6 BSI 05-1999 5.3 Other properties 5.3.1 Thermal endurance Thermal endurance shall be mea

43、sured according to clause28 of IEC674-2. For type 1 film only. Compliance with either one of these two end point criteria shall constitute compliance with this specification sheet. The water content of the air in the ageing oven during the ageing process shall be in the range of9,5 to12,5 g/m 3 . Ag

44、eing temperatures of 140C, 160C and 180C are recommended. 5.3.2 Burning characteristics No requirement. 6 Roll characteristics for all types 6.1 Roll diameter/film length There are no requirements in this standard for roll diameters or film lengths on a roll. These should be subject to contract. 6.2

45、 Windability/sag According to clause6 of IEC674-2 6.2.1 For films of width less than 150 mm, method A shall be used. Table 6 Windability 6.2.2 For films of width 150mm and above, method B shall be used. The extension required to achieve bias/camber and sag limit shall be not more than 0,1%. This req

46、uirement does not apply to thicknesses greater than 36m for which there are no requirements. 6.3 Joins Where joins (splices) are permitted, their construction shall conform to the requirements given in3.3 of IEC674-1. Breaks (unjoined pieces) shall also be indicated so as to be clearly visible when

47、viewed from the end face of the roll. The number of joins (splices) or breaks in each roll shall not exceed the values given inTable 7. Table 7 Maximum permissible number of joins or breaks per roll 6.4 Roll width The maximum difference between the film width measured according to clause 5 of IEC674

48、-2 and the roll width excluding the core (expressed in millimetres) shall be according toTable 8. Table 8 Film width 6.5 Cores The preferred core inner diameters are 76mm and 152mm. Tl $ 130: end point criterion: 10% retention of tensile strength; Tl $ 115: end point criterion: 50% retention of tens

49、ile strength. Property Type 1 Type 2 Bias/camber 50mm Outer diameter 50mm Outer diameter 250mm 450mm 2; 3; 3,5 5; 6 8 10 $ 12 6 5 4 4 4 4 4 3 3 3 6 5 4 4 3 Nominal film width Requirement Maximum difference mm mm 150 150 to 300 $ 300 0,5 1,0 2,0EN 60674-3-2:1998 BSI 05-1999 7 Annex ZA (normative) Normative references to international publications with their corresponding European publications This European Standard