Specification for plastic films for electrical purposes - Part 2: Methods of test (IEC 60674-2:2016)

This part of IEC 60674 is applicable to plastic films used for electrical purposes. This part of
IEC 60674 gives methods of test.

Bestimmung für Isolierfolien für elektrotechnische Zwecke - Teil 2: Prüfverfahren

Spécification pour les films en matière plastique à usages électriques - Partie 2: Méthodes d'essai

Specifikacija za plastične folije za električne namene - 2. del: Metode preskušanja (IEC 60674-2:2016)

Ta del standarda IEC 60674 se uporablja za plastične folije za električne namene. Ta del standarda
IEC 60674 določa metode preskušanja.

General Information

Status
Published
Publication Date
08-Mar-2017
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Mar-2017
Due Date
07-May-2017
Completion Date
09-Mar-2017

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Specification for plastic films for electrical purposes - Part 2: Methods of test (IEC 60674-2:2016)83.140.10Filmi in folijeFilms and sheets29.035.20PDWHULDOLPlastics and rubber insulating materialsICS:Ta slovenski standard je istoveten z:EN 60674-2:2017SIST EN 60674-2:2017en01-maj-2017SIST EN 60674-2:2017SLOVENSKI

STANDARDSIST EN 60674-2:2002/A1:2004SIST EN 60674-2:20021DGRPHãþD
SIST EN 60674-2:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60674-2
February 2017 ICS 17.220.99; 29.035.20
Supersedes
EN 60674-2:1998
English Version
Specification for plastic films for electrical purposes -
Part 2: Methods of test (IEC 60674-2:2016)

Spécification pour les films en matière plastique à usages électriques - Partie 2: Méthodes d'essai (IEC 60674-2:2016)

Bestimmung für Isolierfolien für elektrotechnische Zwecke - Teil 2: Prüfverfahren (IEC 60674-2:2016) This European Standard was approved by CENELEC on 2016-12-23. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions 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 CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization

Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,

B-1000 Brussels © 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 60674-2:2017 E SIST EN 60674-2:2017

EN 60674-2:2017 2 European foreword The text of document 15/742/CDV, future edition 2 of IEC 60674-2, prepared by IEC/TC 15 "Solid electrical insulating materials" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60674-2:2017. The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-09-23 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-12-23

This document supersedes EN 60674-2:1998. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60674-2:2016 was approved by CENELEC as a European Standard without any modification. SIST EN 60674-2:2017

EN 60674-2:2017 3 Annex ZA (normative)

Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.

Publication Year Title EN/HD Year IEC 60212 2010

Standard conditions for use prior to and during the testing of solid electrical insulating materials EN 60212 2011

IEC 60216 series
Electrical insulating materials - Thermal endurance properties EN 60216 series
IEC 60243-1 2013

Electric strength of insulating materials - Test methods - Part 1: Tests at power frequencies EN 60243-1 2013

IEC 60243-2 -

Electric strength of insulating materials - Test methods - Part 2: Additional requirements for tests using direct voltage EN 60243-2 -

IEC 60250 1969

Recommended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulating materials at power, audio and radio frequencies including metre wavelengths - -

IEC 60343 -

Recommended test methods for determining the relative resistance of insulating materials to breakdown by surface discharges EN 60343 -

IEC 60394-2 1972
Varnished fabrics for electrical purposes - Part 2: Methods of test - -
IEC 60426 -

Electrical insulating materials - Determination of electrolytic corrosion caused by insulating materials - Test methods EN 60426 -

IEC 60454-2 2007

Pressure-sensitive adhesive tapes for electrical purposes - Part 2: Methods of test EN 60454-2 2007

SIST EN 60674-2:2017
EN 60674-2:2017 4 Publication Year Title EN/HD Year IEC 60589 -

Methods of test for the determination of ionic impurities in electrical insulating materials by extraction with liquids HD 381 S1 -

IEC/TR 60648 -

Method of test for coefficients of friction of plastic film and sheeting for use as electrical insulation - -

IEC 60674-3 series

Specification for plastic films for electrical purposes - Part 3: Specifications for individual materials EN 60674-3 series

IEC 62631-3-1 -

Dielectric and resistive properties of solid insulating materials - Part 3-1 Determination of resistive properties (DC methods) - Volume resistance and volume resistivity, general method EN 62631-3-1 -

IEC 62631-3-2 -

Dielectric and resistive properties of solid insulating materials - Part 3-2 Determination of resistive properties (DC methods) - Surface resistance and surface resistivity EN 62631-3-2 -

ISO 527-3 1995

Plastics - Determination of tensile properties - Part 3: Test conditions for films and sheets EN ISO 527-3 1995

ISO 534 -

Paper and board - Determination of thickness, density and specific volume EN ISO 534 -

ISO 1183-1 -

Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method, liquid pyknometer method and titration method EN ISO 1183-1 -

ISO 4591 1992

Plastics - Film and sheeting - Determination of average thickness of a sample, and average thickness and yield of a roll, by gravimetric techniques (gravimetric thickness) - -

ISO 4592 -
Plastics - Film and sheeting - Determination of length and width - -
ISO 4593 -

Plastics - Film and sheeting - Determination of thickness by mechanical scanning - -

ISO 6383-1 -

Plastics - Film and sheeting - Determination of tear resistance - Part 1: Trouser tear method EN ISO 6383-1 -

ISO 6383-2 -

Plastics - Film and sheeting - Determination of tear resistance - Part 2: Elmendorf method EN ISO 6383-2 -

ISO 11357-3 2011

Plastics - Differential scanning calorimetry (DSC) - Part 3: Determination of temperature and enthalpy of melting and crystallization EN ISO 11357-3 2013

SIST EN 60674-2:2017
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 17.220.99; 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. SIST EN 60674-2:2017

– 2 – IEC 60674-2:2016 © IEC 2016 CONTENTS FOREWORD ........................................................................................................................... 6 INTRODUCTION ..................................................................................................................... 8 1 Scope .............................................................................................................................. 9 2 Normative references ...................................................................................................... 9 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 ................................................................................... 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 7.4.1 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 11.4 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 SIST EN 60674-2:2017

IEC 60674-2:2016 © IEC 2016 – 3 – 12.4 Result ................................................................................................................... 18 13 Edge tearing resistance ................................................................................................. 19 13.1 General ................................................................................................................. 19 13.2 Principle ............................................................................................................... 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 ...................................................................................................... 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 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 × 10–4 .......................................................... 24 18.3.3 Dissipation factor below 5 × 10–4 .................................................................. 24 19 Dissipation factor under impregnated conditions ............................................................ 24 20 Electric strength ............................................................................................................ 24 20.1 AC and DC tests of film sheet 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 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 SIST EN 60674-2:2017

– 4 – IEC 60674-2:2016 © IEC 2016 21.4.4 Procedure ...................................................................................................... 27 21.4.5 Results .......................................................................................................... 27 22 Resistance to breakdown by 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 Dimensional 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 Test 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 Apparatus ............................................................................................................. 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 Calculations .......................................................................................................... 35 33.6 Result ................................................................................................................... 35 SIST EN 60674-2:2017

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 of 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 (above 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 .............................. 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-monoethyl-ether, formamide mixtures

used in measuring wetting tension of polyethylene and polypropylene films .......................... 17 Table 2 – Classification of materials regarding self-extinguishing properties ......................... 33

SIST EN 60674-2:2017

– 6 – IEC 60674-2:2016 © IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________

SPECIFICATION FOR PLASTIC FILMS
FOR ELECTRICAL 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 questions 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 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply I

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