IEC 60674-2-2016 Specification for plastic films for electrical purposes - Part 2 Methods of test《电工用塑料薄膜规范.第2部分 试验方法》.pdf

1、 IEC 60674-2 Edition 2.0 2016-11 INTERNATIONAL STANDARD Specification for plastic films for electrical purposes Part 2: Methods of test IEC 60674-2:2016-11(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of

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10、your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 60674-2 Edition 2.0 2016-11 INTERNATIONAL STANDARD Specification for plastic films for electrical purposes Part 2: Methods of test INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 17

11、220.99; 29.035.20 ISBN 978-2-8322-3747-2 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 60674-2:2016 IEC 2016 CONTENTS FOREWORD . 6 INTRODUCTION . 8 1 Scope 9 2 Normative references 9

12、3 General notes on tests 10 4 Thickness 10 4.1 General . 10 4.2 Determination of thickness by mechanical scanning 10 4.2.1 General . 10 4.2.2 Measurement by a single sheet . 11 4.3 Determination of thickness by gravimetric method . 11 4.3.1 Measurement by a sample . 11 4.3.2 Measurement by a roll .

13、11 4.4 Crosswise thickness profile and lengthwise variation in thickness . 11 5 Density 12 6 Width . 12 7 Windability (bias/camber and sag) . 12 7.1 Principle . 12 7.2 General . 12 7.3 Method A 12 7.3.1 Principle 12 7.3.2 Measurement of bias/camber . 12 7.3.3 Measurement of sag 13 7.4 Method B 14 7.

14、4.1 Principle 14 7.4.2 Apparatus 14 7.4.3 Test specimens . 15 7.4.4 Procedure 15 7.4.5 Result 15 8 Surface roughness 15 9 Space factor 15 10 Coefficient of friction 16 11 Wetting tension (polyolefine films) . 16 11.1 Test principle and introductory remarks. 16 11.2 Apparatus . 16 11.3 Reagents 16 11

15、4 Test specimens . 17 11.5 Conditioning 17 11.6 Procedure . 17 11.7 Evaluation . 18 11.8 Report. 18 12 Tensile properties 18 12.1 General . 18 12.2 Test specimens . 18 12.3 Speed of testing 18 IEC 60674-2:2016 IEC 2016 3 12.4 Result . 18 13 Edge tearing resistance . 19 13.1 General . 19 13.2 Princi

16、ple . 19 14 Tear resistance 19 15 Stiffness of film 19 16 Surface resistivity 19 17 Volume resistivity 19 17.1 Method 1: Electrode method . 19 17.2 Method 2: Method for wound capacitor dielectric films or films too thin for Method 1. 19 17.2.1 Principle 19 17.2.2 Test specimens . 20 17.2.3 Procedure

17、 20 17.2.4 Result 20 18 Dissipation factor and permittivity 20 18.1 General . 20 18.2 Method 1. 20 18.2.1 General . 20 18.2.2 Sample and specimen handling . 21 18.2.3 Sample conditioning prior to measurement 21 18.2.4 Measurements with contacting electrodes 21 18.2.5 Measurements with non-contacting

18、 electrodes . 23 18.2.6 Test procedure 23 18.2.7 Report . 23 18.3 Method 2. 23 18.3.1 General . 23 18.3.2 Dissipation factor at or above 5 10 424 18.3.3 Dissipation factor below 5 10 424 19 Dissipation factor under impregnated conditions 24 20 Electric strength 24 20.1 AC and DC tests of film sheet

19、sandwiched by metal electrodes . 24 20.2 DC test using a wound capacitor . 24 21 Electrical weak spots . 24 21.1 General . 24 21.2 Method A: Testing narrow strips of film in long lengths 25 21.2.1 Test equipment 25 21.2.2 Procedure 25 21.2.3 Results 25 21.3 Method B: Testing wide strips of film . 25

20、 21.3.1 General . 25 21.3.2 Test equipment 25 21.3.3 Procedure 26 21.3.4 Results 26 21.4 Method C: Testing of film in rolls . 26 21.4.1 General . 26 21.4.2 Unreeling system . 26 21.4.3 Fault counter . 27 4 IEC 60674-2:2016 IEC 2016 21.4.4 Procedure 27 21.4.5 Results 27 22 Resistance to breakdown by

21、surface discharges 28 23 Electrolytic corrosion . 28 24 Melting point 28 25 Dimensional change 28 25.1 Test specimens . 28 25.2 Procedure . 28 25.3 Results . 28 26 Dimensional stability under tension with rising temperature . 29 26.1 Test specimens . 29 26.2 Procedure . 29 26.3 Results . 29 27 Dimen

22、sional stability under pressure with rising temperature . 29 27.1 Test equipment . 29 27.2 Test specimens . 29 27.3 Procedure . 29 27.4 Results . 30 28 Resistance to penetration at elevated temperature 30 28.1 General . 30 28.2 Principle . 30 29 Volatile content (loss of mass on heating) 30 29.1 Tes

23、t specimens . 30 29.2 Procedure . 30 29.3 Result . 30 30 Thermal endurance 30 31 Burning characteristics 31 31.1 Principle . 31 31.2 Apparatus . 31 31.3 Test specimens . 31 31.4 Conditioning 31 31.5 Procedure . 32 31.6 Interpretation of results . 32 32 Water absorption in a damp atmosphere 33 32.1 A

24、pparatus . 33 32.2 Test specimens . 33 32.3 Procedure . 33 32.3.1 Water absorption of material as-received . 33 32.3.2 Water absorption of dry material 33 32.4 Results . 34 33 Absorption of liquid 34 33.1 Principle . 34 33.2 Apparatus . 34 33.3 Test specimens . 34 33.4 Procedure . 34 33.5 Calculatio

25、ns 35 33.6 Result . 35 IEC 60674-2:2016 IEC 2016 5 34 Ionic impurities 35 35 Effect of insulating varnishes . 35 35.1 Procedure . 35 35.2 Results . 35 36 Effect of polymerisable resinous compounds in a liquid state . 36 36.1 Procedure . 36 36.2 Results . 36 Figure 1 Windability of film Measurement o

26、f bias/camber Method A . 36 Figure 2 Windability of film Apparatus for measurement of sag Method A 37 Figure 3 Windability of film Measurement of sag Method A. 37 Figure 4 Three-terminal electrode system for low frequencies (up to 50 kHz) . 38 Figure 5 Two-electrode system for high frequencies (abov

27、e 50 kHz) 38 Figure 6 Equipment for testing for electrical weak spots by Method A 39 Figure 7 Equipment for testing for electrical weak spots by Method B 40 Figure 8 Equipment for testing for electrical weak spots by Method C1 40 Figure 9 Equipment for testing for electrical weak spots by Method C2

28、41 10a) Full view on arrangements of rolls, rollers and HV electrode . 41 10b) Schematic diagram with arrangement around the air gap 41 between HV electrode and earthed roller 41 Figure 10 Equipment for testing for electrical weak spots by Method C3 41 Table 1 Concentrations of ethylene-glycol-monoe

29、thyl-ether, formamide mixtures used in measuring wetting tension of polyethylene and polypropylene films 17 Table 2 Classification of materials regarding self-extinguishing properties . 33 6 IEC 60674-2:2016 IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SPECIFICATION FOR PLASTIC FILMS FOR ELE

30、CTRICAL PURPOSES Part 2: Methods of test FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all qu

31、estions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publicati

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37、ion bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall at

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39、es) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publicat

40、ion. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60674-2 has been prepared by IEC technical committee 15: So

41、lid electrical insulating materials. This second edition cancels and replaces the first edition published in 1988 and Amendment 1 (2001). This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) this doc

42、ument was completely revised editorially and technically and included in the IEC 60674 series of standards; b) the test methods are updated to reflect todays state of the art; c) a method to obtain DC electric strength is now specified according to IEC 60243-2. IEC 60674-2:2016 IEC 2016 7 The text o

43、f this standard is based on the following documents: CDV Report on voting 15/742/CDV 15/760/RVC Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/

44、IEC Directives, Part 2. A list of all parts in the IEC 60674 series, published under the general title Specification for plastic films for electrical purposes, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date

45、 indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. 8 IEC 60674-2:2016 IE

46、C 2016 INTRODUCTION This document is one of a series which deals with plastic films for electrical purposes. The series consists of three parts: Part 1: Definitions and general requirements (IEC 60674-1) Part 2: Methods of test (IEC 60674-2) Part 3: Specifications for individual materials (IEC 60674

47、3 (all parts) IEC 60674-2:2016 IEC 2016 9 SPECIFICATION FOR PLASTIC FILMS FOR ELECTRICAL PURPOSES Part 2: Methods of test 1 Scope This part of IEC 60674 is applicable to plastic films used for electrical purposes. This part of IEC 60674 gives methods of test. 2 Normative references The following do

48、cuments are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60212:201

49、0, Standard conditions for use prior to and during the testing of solid electrical insulating materials IEC 60216 (all parts), Electrical insulating materials Thermal endurance properties IEC 60243-1:2013, Electric strength of insulating materials Test methods Part 1: Tests at power frequencies IEC 60243-2, Electric strength of insulating materials Test methods Part 2: Additional requirements for tests using direct voltage IEC 60250:1969, Recommended m