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BS EN IEC 62631-2-2:2022

BS EN IEC 62631-2-2:2022

$167.15

Dielectric and resistive properties of solid insulating materials – Relative permittivity and dissipation factor. High frequencies (1 MHz to 300 MHz). AC methods

Published By Publication Date Number of Pages
BSI 2022 34
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This part of IEC 62631 specifies test methods for the determination of permittivity and dissipation factor properties of solid insulating materials in a high frequency range from 1 MHz to 300 MHz.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 INTRODUCTION
12 1 Scope
2 Normative references
3 Terms and definitions
13 4 Methods of test
4.1 Basic theory
15 Figures
Figure 1 – Dielectric dissipation factor
16 Figure 2 – Equivalent circuit diagrams with capacitive test specimen
17 4.2 Distinctive factors for the measurement in high frequency range
Figure 3 – Equivalent parallel circuit for test fixture with sample and leads to equipment
18 4.3 Power supply
4.4 Equipment
4.4.1 Accuracy
19 4.4.2 Distinctive feature of equipment for measurement in high frequency range
20 4.4.3 Choice of measurement methods
Figure 4 – Existence of residual impedance andstray capacitance in directly connected system
21 4.5 Calibration
4.6 Test specimen
4.6.1 General
4.6.2 Recommended dimensions of test specimen and electrode arrangements
4.6.3 Number of test specimens
4.6.4 Conditioning and pre-treatment of test specimen
Table 1 – Applicable frequency range in effective apparatus
22 4.7 Procedures for specific materials
5 Test procedure
5.1 General
5.2 Calculation of permittivity and relative permittivity
5.2.1 Relative permittivity
5.2.2 Dielectric dissipation factor tan δ
6 Report
23 7 Repeatability and reproducibility
24 Annex A (informative)Compensation method using a series circuit
Figure A.1 – Compensation method using a series circuit
25 Annex B (informative)Parallel electrodes with shield ring
Figure B.1 – Configuration of parallel electrode with shield ring
26 Annex C (informative)Apparatus
C.1 Parallel T network bridge
Figure C.1 – Parallel T network, principal circuit diagram
Figure C.2 – Parallel T network, practical circuit diagram
27 C.2 Resonance method
28 Figure C.3 – Principle of resonance method, circuit diagram(originally from Q meter)
29 C.3 I-V method designed for high frequencies
C.4 Auto-balancing bridge method
30 Figure C.4 – Auto-balancing circuit
31 Annex D (informative)Non-contacting electrode method withmicrometer-controlled parallel electrodes in air
32 Figure D.1 – Non-contacting electrode method
33 Bibliography

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BS EN IEC 62631-2-2:2022
$167.15