SIST EN IEC 62631-3-1:2023

SLOVENSKI STANDARD
SIST EN IEC 62631-3-1:2023
01-maj-2023
Dielektrične in uporovne lastnosti trdnih izolacijskih materialov - 3-1. del:
Ugotavljanje uporovnih lastnosti (metode z enosmernim tokom) - Prehodna
upornost in specifična prehodna upornost - Splošna metoda (IEC 62631-3-1:2023)
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)
Dielektrische und resistive Eigenschaften fester Isolierstoffe - Teil 3-1: Bestimmung
resistiver Eigenschaften (Gleichspannungsverfahren) - Durchgangswiderstand und
spezifischer Durchgangswiderstand, Basisverfahren (IEC 62631-3-1:2023)
Propriétés diélectriques et résistives des matériaux isolants solides - Partie 3-1:
Détermination des propriétés résistives (méthodes en courant continu) - Résistance
transversale et résistivité transversale - Méthode générale (IEC 62631-3-1:2023)
Ta slovenski standard je istoveten z: EN IEC 62631-3-1:2023
ICS:
17.220.99 Drugi standardi v zvezi z Other standards related to
elektriko in magnetizmom electricity and magnetism
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
SIST EN IEC 62631-3-1:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62631-3-1:2023

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SIST EN IEC 62631-3-1:2023


EUROPEAN STANDARD EN IEC 62631-3-1

NORME EUROPÉENNE

EUROPÄISCHE NORM March 2023
ICS 17.220.99; 29.035.01 Supersedes EN 62631-3-1:2016
English Version
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)
Propriétés diélectriques et résistives des matériaux isolants Dielektrische und resistive Eigenschaften fester Isolierstoffe
solides - Partie 3-1: Détermination des propriétés résistives - Teil 3-1: Bestimmung resistiver Eigenschaften
(méthodes en courant continu) - Résistance volumique et (Gleichspannungsverfahren) - Durchgangswiderstand und
résistivité volumique - Méthode générale spezifischer Durchgangswiderstand - Basisverfahren
(IEC 62631-3-1:2023) (IEC 62631-3-1:2023)
This European Standard was approved by CENELEC on 2023-02-27. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 62631-3-1:2023 E

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SIST EN IEC 62631-3-1:2023
EN IEC 62631-3-1:2023 (E)
European foreword
The text of document 112/597/FDIS, future edition 2 of IEC 62631-3-1, prepared by IEC/TC 112
"Evaluation and qualification of electrical insulating materials and systems" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 62631-3-1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-11-27
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-02-27
document have to be withdrawn

This document supersedes EN 62631-3-1:2016 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62631-3-1:2023 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 62631-3-11 NOTE Approved as EN IEC 62631-3-11
2

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SIST EN IEC 62631-3-1:2023
EN IEC 62631-3-1:2023 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
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.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60212 - Standard conditions for use prior to and EN 60212 -
during the testing of solid electrical
insulating materials
IEC 60455-2 - Resin based reactive compounds used for EN 60455-2 -
electrical insulation - Part 2: Methods of
test
IEC 60464-2 - Varnishes used for electrical insulation - EN 60464-2 -
Part 2: Methods of test
IEC 61212-2 - Insulating materials - Industrial rigid round EN 61212-2 -
laminated tubes and rods based on
thermosetting resins for electrical purposes
- Part 2: Methods of test

3

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SIST EN IEC 62631-3-1:2023



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




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 62631-3-1:2023
– 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

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SIST EN IEC 62631-3-1:2023
IEC 62631-3-1:2023 © IEC 2023 – 3 –
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.

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SIST EN IEC 62631-3-1:2023
– 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 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.

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SIST EN IEC 62631-3-1:2023
IEC 62631-3-1:2023 © IEC 2023 – 5 –
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 specifies a method of test for the determination of volume resistance
and volume resistivity of electrical 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 60455-2, Resin based reactive compounds used for electrical insulation – Part 2: Methods
of test
IEC 60464-2, Varnishes used for electrical insulation – Part 2: Methods of test
IEC 61212-2, Industrial materials – Industrial rigid round laminated tubes and rods based on
thermosetting resins for electrical purposes – Part 2: Methods of test
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
volume resistance
quotient of a direct voltage applied between two electrodes in contact with an insulating medium
and the current through it at a given duration of voltage application
Note 1 to entry: Volume resistance is expressed in Ω.
3.2
volume resistivity
quotient of a DC electric field system and the current density within an insulating medium at a
given time of voltage application

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Note 1 to entry:
...