IEC 62631-2-3:2024
(Main)Dielectric and resistive properties of solid insulating materials - Part 2-3: Relative permittivity and dissipation factor - Contact electrode method for insulating films - AC methods
Dielectric and resistive properties of solid insulating materials - Part 2-3: Relative permittivity and dissipation factor - Contact electrode method for insulating films - AC methods
IEC 62631-2-3:2024 specifies the measuring technology and the test method for the relative permittivity and dielectric dissipation factor of thin single layer insulating polymer film without any additional metallization on the sample surface. The adaptive thickness range is approximately 10 μm to 100 μm. The proposed frequency is the power frequency (50 Hz or 60 Hz), and it is also suitable in the technical frequency range from 1 Hz to 1 MHz.
Propriétés diélectriques et résistives des matériaux isolants solides - Partie 2-3 : Permittivité relative et facteur de dissipation - Méthode d'électrode de contact pour films isolants - Méthodes en courant alternatif
L’IEC 62631-2-3:2024 spécifie la technologie de mesure et la méthode d’essai pour la permittivité relative et le facteur de dissipation diélectrique d’un film polymère isolant monocouche mince sans métallisation supplémentaire sur la surface de l’échantillon. La plage d’épaisseurs adaptatives est d’environ 10 μm à 100 μm. La fréquence proposée est la fréquence industrielle (50 Hz ou 60 Hz), et elle est également appropriée dans la plage de fréquences techniques comprises entre 1 Hz et 1 MHz.
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IEC 62631-2-3 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –
Part 2-3: Relative permittivity and dissipation factor – Contact electrode method
for insulating films – AC methods
Propriétés diélectriques et résistives des matériaux isolants solides –
Partie 2-3 : Permittivité relative et facteur de dissipation – Méthode d'électrode
de contact pour films isolants – Méthodes en courant alternatif
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IEC 62631-2-3 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –
Part 2-3: Relative permittivity and dissipation factor – Contact electrode method
for insulating films – AC methods
Propriétés diélectriques et résistives des matériaux isolants solides –
Partie 2-3 : Permittivité relative et facteur de dissipation – Méthode d'électrode
de contact pour films isolants – Méthodes en courant alternatif
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99, 29.035.01 ISBN 978-2-8322-8684-5
– 2 – IEC 62631-2-3:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms and symbols . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms and symbols . 9
4 Principle of method . 10
4.1 Principle of measurement. 10
4.2 Edge effect of electrodes . 11
5 Electrodes . 11
5.1 Design and manufacture of electrodes . 11
5.2 Edge effect of the measuring electrode . 13
6 Samples . 13
7 Measuring voltage . 13
8 Environmental conditions for measurements . 13
9 Measurement of thickness for films . 14
10 Measurement procedure . 14
11 Report . 14
12 Repeatability, reproducibility and replicability . 14
Annex A (normative) Correction method of measured permittivity and dielectric
dissipation factor for a sample with scabrous surfaces . 15
A.1 General . 15
A.2 Physical model . 15
A.3 Relationship between the measured permittivity and the real permittivity . 16
A.4 Relationship between the measured dielectric dissipation factor and the real
dielectric dissipation factor . 21
A.5 Method of correction for the sample with scabrous surfaces . 25
Annex B (informative) Suggestions for the manufacture of electrodes . 26
B.1 General . 26
B.2 Materials . 26
B.3 Manufacture of electrodes . 26
B.4 Evaluation methods of flatness and roughness. 26
B.5 Resistance of the measuring electrode system. 26
Bibliography . 27
Figure 1 – Diagram of the three-electrode system . 12
Figure A.1 – Schematic diagram of the profile including scabrous surfaces of sample
and polished flat electrodes, with the density thickness and apparent thickness
(mechanical thickness) . 15
Figure A.2 – Physical model of the scabrous surfaces of the sample and polished flat
electrodes . 15
Figure A.3 – Equivalent circuits with the sample, the gap and the electrodes . 16
Figure A.4 – Relationship between the measured permittivity, the real permittivity, the
void ratio and the contact ratio . 21
Figure A.5 – Relationship between the measured dielectric dissipation factor, the real
dielectric dissipation factor, the void ratio and the contact ratio . 25
Table 1 – Dimensional parameters of the three-electrode system and the relationship
between the measured ε for the thickness of sample and the measured capacitance . 12
x
– 4 – IEC 62631-2-3:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIELECTRIC AND RESISTIVE PROPERTIES OF
SOLID INSULATING MATERIALS –
Part 2-3: Relative permittivity and dissipation factor –
Contact electrode method for insulating films – AC methods
FOREWORD
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