IEC 62631-3-3:2015

IEC 62631-3-3 ®
Edition 1.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –
Part 3-3: Determination of resistive properties (DC methods) – Insulation
resistance
Propriétés diélectriques et résistives des matériaux isolants solides –
Partie 3-3: Détermination des propriétés résistives (méthodes en courant
continu) – Résistance d'isolement

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IEC 62631-3-3 ®
Edition 1.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –

Part 3-3: Determination of resistive properties (DC methods) – Insulation

resistance
Propriétés diélectriques et résistives des matériaux isolants solides –

Partie 3-3: Détermination des propriétés résistives (méthodes en courant

continu) – Résistance d'isolement

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-3024-4

– 2 – IEC 62631-3-3:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Significance . 8
5 Method of test . 9
5.1 General . 9
5.2 Test conditions . 9
5.2.1 Voltage . 9
5.2.2 Electrode material . 9
5.3 Equipment . 10
5.3.1 General . 10
5.3.2 Accuracy . 10
5.3.3 Voltage source . 10
5.4 Calibration . 10
5.5 Test specimen . 11
5.5.1 Dimensions of test specimen . 11
5.5.2 Test specimen for insulating resistance between tapered pin electrodes . 11
5.5.3 Test specimen for insulating resistance between bar electrodes . 11
5.5.4 Manufacturing of test specimen . 11
5.5.5 Number of test specimen . 12
5.5.6 Conditioning and pre-treatment of test specimen . 12
5.6 Electrode application . 12
5.6.1 Application of tapered pin electrodes . 12
5.6.2 Application of bar electrodes . 13
5.7 Test procedure . 14
5.8 Evaluation . 14
5.8.1 Insulating resistance between tapered pin electrodes . 14
5.8.2 Insulating resistance between bar electrodes . 14
6 Test report . 14
7 Repeatability and reproducibility . 15
Bibliography . 16

Figure 1 – Pin electrode arrangements . 6
Figure 2 – Bar electrode arrangement . 7
Figure 3 – Specimen for measurement of the insulation resistance R between plugs . 13
I
Table 1 – Composition of electrode steel . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIELECTRIC AND RESISTIVE PROPERTIES
OF SOLID INSULATING MATERIALS –

Part 3-3: Determination of resistive properties (DC methods) –
Insulation resistance
FOREWORD
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