IEC 62631-3-1:2023
(Main)Dielectric and resistive properties of solid insulating materials - Part 3-1: Determination of resistive properties (DC methods) - Volume resistance and volume resistivity - General method
Dielectric and resistive properties of solid insulating materials - Part 3-1: Determination of resistive properties (DC methods) - Volume resistance and volume resistivity - General method
IEC 62631-3-1:2023 specifies a method of test for the determination of volume resistance and volume resistivity of electrical insulating materials by applying a DC voltage. This edition includes the following significant technical changes with respect to the previous edition:
- following the withdrawal of IEC 60093 and its partial replacement with the first edition of IEC 62631-3-1, the missing editorial and technical texts have been added and incorporated into this second edition of IEC 62631-3-1;
- the alignment of normative texts and informative notes have been addressed as well as the normative references and bibliography.
Propriétés diélectriques et résistives des matériaux isolants solides - Partie 3-1: Détermination des propriétés résistives (méthodes en courant continu) - Résistance volumique et résistivité volumique - Méthode générale
L'IEC 62631-3-1:2023 spécifie une méthode d'essai pour déterminer la résistance volumique et la résistivité volumique de matériaux isolants électriques par application d'une tension continue. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- à la suite du retrait de l'IEC 60093 et à son remplacement partiel par la première édition de l’IEC 62631-3-1, des éléments rédactionnels et techniques manquants ont été ajoutés et intégrés dans la seconde édition de l’IEC 62631-3-1;
- un alignement des textes normatifs et des notes informatives a été réalisé ainsi qu’une mise à jour des références normatives et de la bibliographie.
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IEC 62631-3-1 ®
Edition 2.0 2023-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Dielectric and resistive properties of solid insulating materials –
Part 3-1: Determination of resistive properties (DC methods) – Volume
resistance and volume resistivity – General method
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
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IEC 62631-3-1 ®
Edition 2.0 2023-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Dielectric and resistive properties of solid insulating materials –
Part 3-1: Determination of resistive properties (DC methods) – Volume
resistance and volume resistivity – General method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-6413-3
– 2 – IEC 62631-3-1:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Significance . 6
4.1 General . 6
5 Method of test .
5.1 General .
4.2 Power supply, and voltage . 7
4.3 Equipment . 7
4.3.1 Accuracy . 7
4.3.2 Guarding . 8
4.3.3 Electrodes . 10
4.4 Calibration . 12
4.5 Test specimen . 12
4.5.1 General . 12
5.5.2 Recommended dimensions of test specimens and electrode
arrangements .
4.5.2 Manufacturing of test specimens. 12
4.5.3 Number of test specimens . 13
4.5.4 Conditioning and pre-treatment of test specimens . 13
4.6 Procedures for specific materials . 13
5 Test procedure . 13
5.1 General . 13
5.2 Measurement of volume resistance . 13
5.3 Calculation of volume resistivity . 13
6 Test report . 14
7 Repeatability and reproducibility . 14
Bibliography . 15
Figure 1 – Basic connection for guarded electrodes . 8
Figure 2 – Electrode arrangement . 9
Figure 3 – Specimen with liquid electrodes . 11
Table 1 – Test specimen .
Table 1 – Typical electrode dimensions for electrode arrangement (examples) . 9
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIELECTRIC AND RESISTIVE PROPERTIES
OF SOLID INSULATING MATERIALS –
Part 3-1: Determination of resistive properties (DC methods) –
Volume resistance and volume resistivity – General method
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes made to
the previous edition IEC 62631-3-1:2016. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
– 4 – IEC 62631-3-1:2023 RLV © IEC 2023
IEC 62631-3-1 has been prepared by IEC technical committee 112: Evaluation and qualification
of electrical insulating materials and systems. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) following the withdrawal of IEC 60093 and its partial replacement with the first edition of
IEC 62631-3-1, the missing editorial and technical texts have been added and incorporated
into this second edition of IEC 62631-3-1;
b) the alignment of normative texts and informative notes have been addressed as well as the
normative references and bibliography.
The text of this International Standard is based on the following documents:
Draft Report on voting
112/597/FDIS 112/604/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 62631 series, published under the general title Dielectric and
resistive properties of solid insulating materials, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
DIELECTRIC AND RESISTIVE PROPERTIES
OF SOLID INSULATING MATERIALS –
Part 3-1: Determination of resistive properties (DC methods) –
Volume resistance and volume resistivity – General method
1 Scope
This part of IEC 62631 covers specifies a method of test for the determination of volume
resistance and volume resistivity of electrical insulation insulating materials by applying a DC
voltage.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60212, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 60455 (all parts), Resin based reactive compounds used for electrical insulation
IEC 60455-2, Resin based reactive compounds used for electrical insulation – Part 2: Methods
of test
IEC 60464 (all parts), Varnishes used for el
...
IEC 62631-3-1 ®
Edition 2.0 2023-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –
Part 3-1: Determination of resistive properties (DC methods) – Volume
resistance and volume resistivity – General method
Propriétés diélectriques et résistives des matériaux isolants solides –
Partie 3-1: Détermination des propriétés résistives (méthodes en courant
continu) – Résistance volumique et résistivité volumique – Méthode générale
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez
les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 62631-3-1 ®
Edition 2.0 2023-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Dielectric and resistive properties of solid insulating materials –
Part 3-1: Determination of resistive properties (DC methods) – Volume
resistance and volume resistivity – General method
Propriétés diélectriques et résistives des matériaux isolants solides –
Partie 3-1: Détermination des propriétés résistives (méthodes en courant
continu) – Résistance volumique et résistivité volumique – Méthode générale
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-6359-4
– 2 – IEC 62631-3-1:2023 © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Significance . 6
4.1 General . 6
4.2 Power supply and voltage . 6
4.3 Equipment . 7
4.3.1 Accuracy . 7
4.3.2 Guarding . 7
4.3.3 Electrodes . 9
4.4 Calibration . 11
4.5 Test specimen . 11
4.5.1 General . 11
4.5.2 Manufacturing of test specimens. 11
4.5.3 Number of test specimens . 11
4.5.4 Conditioning and pre-treatment of test specimens . 11
4.6 Procedures for specific materials . 12
5 Test procedure . 12
5.1 General . 12
5.2 Measurement of volume resistance . 12
5.3 Calculation of volume resistivity . 12
6 Test report . 12
7 Repeatability and reproducibility . 13
Bibliography . 14
Figure 1 – Basic connection for guarded electrodes . 8
Figure 2 – Electrode arrangement . 8
Figure 3 – Specimen with liquid electrodes . 10
Table 1 – Typical electrode dimensions for electrode arrangement (examples) . 9
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIELECTRIC AND RESISTIVE PROPERTIES
OF SOLID INSULATING MATERIALS –
Part 3-1: Determination of resistive properties (DC methods) –
Volume resistance and volume resistivity – General method
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62631-3-1 has been prepared by IEC technical committee 112: Evaluation and qualification
of electrical insulating materials and systems. It is an International Standard.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) following the withdrawal of IEC 60093 and its partial replacement with the first edition of
IEC 62631-3-1, the missing editorial and technical texts have been added and incorporated
into this second edition of IEC 62631-3-1;
b) the alignment of normative texts and informative notes have been addressed as well as the
normative references and bibliography.
– 4 – IEC 62631-3-1:2023 © IEC 2023
The text of this International Standard is based on the following documents:
Draft Report on voting
112/597/FDIS 112/604/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Direc
...
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