IEC 62631-2-2:2022

IEC 62631-2-2 ®
Edition 1.0 2022-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –
Part 2-2: Relative permittivity and dissipation factor – High frequencies
(1 MHz to 300 MHz) – AC methods

Propriétés diélectriques et résistives des matériaux isolants solides –
Partie 2-2: Permittivité relative et facteur de dissipation – Hautes fréquences
(1 MHz à 300 MHz) – Méthodes en courant alternatif

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IEC 62631-2-2 ®
Edition 1.0 2022-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –

Part 2-2: Relative permittivity and dissipation factor – High frequencies

(1 MHz to 300 MHz) – AC methods

Propriétés diélectriques et résistives des matériaux isolants solides –

Partie 2-2: Permittivité relative et facteur de dissipation – Hautes fréquences

(1 MHz à 300 MHz) – Méthodes en courant alternatif

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-1096-7

– 2 – IEC 62631-2-2:2022 © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Methods of test . 8
4.1 Basic theory . 8
4.2 Distinctive factors for the measurement in high frequency range . 12
4.3 Power supply . 13
4.4 Equipment . 13
4.4.1 Accuracy . 13
4.4.2 Distinctive feature of equipment for measurement in high frequency
range . 14
4.4.3 Choice of measurement methods . 15
4.5 Calibration . 16
4.6 Test specimen . 16
4.6.1 General . 16
4.6.2 Recommended dimensions of test specimen and electrode
arrangements . 16
4.6.3 Number of test specimens . 16
4.6.4 Conditioning and pre-treatment of test specimen . 16
4.7 Procedures for specific materials . 17
5 Test procedure . 17
5.1 General . 17
5.2 Calculation of permittivity and relative permittivity . 17
5.2.1 Relative permittivity . 17
5.2.2 Dielectric dissipation factor tan δ . 17
6 Report . 17
7 Repeatability and reproducibility . 18
Annex A (informative) Compensation method using a series circuit . 19
Annex B (informative) Parallel electrodes with shield ring . 20
Annex C (informative) Apparatus . 21
C.1 Parallel T network bridge . 21
C.2 Resonance method . 22
C.3 I-V method designed for high frequencies . 24
C.4 Auto-balancing bridge method . 24
Annex D (informative) Non-contacting electrode method with micrometer-controlled
parallel electrodes in air . 26
Bibliography . 28

Figure 1 – Dielectric dissipation factor . 10
Figure 2 – Equivalent circuit diagrams with capacitive test specimen . 11
Figure 3 – Equivalent parallel circuit for test fixture with sample and leads to
equipment . 12
Figure 4 – Existence of residual impedance and stray capacitance in directly
connected system . 15

Figure A.1 – Compensation method using a series circuit . 19
Figure B.1 – Configuration of parallel electrode with shield ring . 20
Figure C.1 – Parallel T network, principal circuit diagram . 21
Figure C.2 – Parallel T network, practical circuit diagram . 21
Figure C.3 – Principle of resonance method, circuit diagram (originally from Q meter) . 23
Figure C.4 – Auto-balancing circuit . 25
Figure D.1 – Non-contacting electrode method . 27

Table 1 – Applicable frequency range in effective apparatus . 16

– 4 – IEC 62631-2-2:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIELECTRIC AND RESISTIVE PROPERTIES OF
SOLID INSULATING MATERIALS –
Part 2-2: Relative permittivity and dissipation factor –
High frequencies (1 MHz to 300 MHz) – AC methods

FOREWORD
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