IEC 62631-3-2:2023 describes methods of test for the determination of surface resistance and surface resistivity of electrical insulation materials by applying DC voltage. This edition includes the following significant technical changes with respect to the previous edition: a) descriptions of the electrode arrangements have been clarified; b) new descriptions of the conductive means have been added; c) a new informative Annex B summarizing the results of the comparative verification study on surface resistivities using different electrode arrangements has been added.

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1	30485185
48	A-30371740
49	undefined
52	Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
53	English CONTENTS
55	FOREWORD
57	1 Scope 2 Normative references 3 Terms and definitions
59	4 Significance 5 Method of test 5.1 General
60	5.2 Voltage 5.3 Equipment 5.3.1 General 5.3.2 Accuracy
61	5.3.3 Voltage source 5.3.4 Electrode arrangements
62	Figures Figure 1 – Electrode arrangement A (example)
63	Figure 2 – Electrode arrangement B (example)
64	Figure 3 – Electrode arrangement C (example) Tables Table 1 – Typical electrode dimensions for electrode arrangement C
65	5.4 Test circuit
66	5.5 Calibration 5.6 Test specimen 5.6.1 Recommended dimensions of test specimen and electrode arrangements 5.6.2 Manufacturing of test specimen Figure 4 – Connection diagram of measurement with two- and three-terminal electrode arrangements
67	5.6.3 Number of test specimens 5.6.4 Application of conductive means 5.6.5 Conditioning and pre-treatment of test specimen
68	5.7 Test procedure 6 Calculation of surface resistivity 6.1 For electrode arrangements A, B, D and E 6.2 For electrode arrangement C
69	7 Test report 8 Repeatability and reproducibility
70	Annex A (informative) Specimen dimensions and electrode arrangements Table A.1 – Recommended test specimen dimensions and electrode arrangements for specific products
71	Annex B (informative) Comparative verification study on surface resistivities using different electrode arrangements (type C and type E) B.1 General B.2 Inter-laboratory trial conditions B.2.1 General B.2.2 Test specimens B.2.3 Electrode types, conductive materials and test voltage Table B.1 – Test specimens characteristics
72	B.2.4 Test conditions B.3 Summary of the test results Figure B.1 – Surface resistivity equations for the used electrodes Table B.2 – Test conditions per specific participant
73	B.4 Inter-laboratory trial outcomes and suggestions for IEC 62631-3-2 B.5 Detailed inter-laboratory results B.5.1 General Table B.3 – Summary of the test results
74	B.5.2 Laboratories results by different groups of electrode types and conductive materials for the different test specimens Table B.4 – Polybutylene terephthalate (PBT) test specimen results – Electrode type C with conductive rubber
75	Table B.5 – Polyamide 66 (PA66) test specimen results – Electrode type C with conductive rubber
76	Table B.6 – Polybutylene terephthalate (PBT) test specimen results – Electrode type C with conductive silver paint
77	Table B.7 – Polyamide 66 (PA66) test specimen results – Electrode type C with conductive silver paint
78	Table B.8 – Polybutylene terephthalate (PBT results) test specimen results – Electrode type E with conductive silver paint
79	Table B.9 – Polyamide 66 (PA66) test specimen results – Electrode type E with conductive silver paint
80	B.5.3 Laboratory 2 results comparing different electrode types and conductive materials Table B.10 – Laboratory 2 results – Polybutylene terephthalate (PBT) – Different electrodes and conductive materials
81	Table B.11 – Laboratory 2 results – Polyamide 66 (PA66) – Different electrodes and conductive materials
82	B.5.4 Laboratory 3 results – Electrode type C with and without use of conductive silver paint Table B.12 – Laboratory 3 results – Polybutylene terephthalate (PBT) – Electrode type C with and without conductive silver paint
83	Table B.13 – Laboratory 3 results – Polyamide 66 (PA66) – Electrode type C with and without conductive silver paint
84	Bibliography

Published By	Publication Date	Number of Pages
BSI	2024	86


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Status	Definitive
Pages	86
Publication Date	2024-01-04
ISBN	978 0 539 30000 0
Standard Number	BS EN IEC 62631-3-2:2023 – TC
Title	Tracked Changes. Dielectric and resistive properties of solid insulating materials – Determination of resistive properties (DC methods). Surface resistance and surface resistivity
Descriptors	Accuracy, Solid electrical insulating materials, Electrical resistivity, Electrical insulating materials, Electrical testing, Circuits, Resistance measurement, Test equipment, Electrical resistance
Publisher	BSI
Committee	GEL/112
ICS Codes	17.220.99 - Other standards related to electricity and magnetism

BS EN IEC 62631-3-2:2023 – TC:2024 Edition

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