EN IEC 62836:2024
(Main)Measurement of internal electric field in insulating materials - Pressure wave propagation method
Measurement of internal electric field in insulating materials - Pressure wave propagation method
IEC 62836:2024 provides an efficient and reliable procedure to test the internal electric field in the insulating materials used for high-voltage applications, by using the pressure wave propagation (PWP) method. It is suitable for a planar and coaxial geometry sample with homogeneous insulating materials of thickness larger or equal to 0,5 mm and an electric field higher than 1 kV/mm, but it is also dependent on the thickness of the sample and the pressure wave generator. This first edition cancels and replaces IEC TS 62836 published in 2020. This edition includes the following significant technical changes with respect to IEC TS 62836: a) addition of Clause 12 for the measurement of space charge distribution in a planar sample; b) addition of Clause 13 for coaxial geometry samples; c) addition of Annex D with measurement examples for coaxial geometry samples; d) addition of a Bibliography; e) measurement examples for a planar sample have been moved from Clause 12 in IEC TS 62836 to Annex C.
Messung des inneren elektrischen Feldes in Isoliermaterialien - Methode der Druckwellenausbreitung
Mesurage du champ électrique interne dans les matériaux isolants - Méthode de l'onde de pression
L’IEC 62836 :2024 fournit une procédure efficace et fiable pour évaluer le champ électrique interne dans les matériaux isolants utilisés pour les applications à haute tension, par la méthode de l'onde de pression (PWP). Cette méthode convient aux échantillons à géométrie plane et coaxiale constitués de matériaux isolants homogènes d'une épaisseur supérieure ou égale à 0,5 mm et aux champs électriques supérieurs à 1 kV/mm, mais elle dépend également de l'épaisseur de l'échantillon et du générateur d'ondes de pression. Cette première édition annule et remplace l'IEC TS 62836 parue en 2020. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'IEC TS 62836: a) ajout de l'Article 12 relatif au mesurage de la répartition des charges d'espace sur un échantillon plan; b) ajout de l'Article 13 relatif aux échantillons à géométrie coaxiale; c) ajout de l'Annexe D qui fournit des exemples de mesurages sur des échantillons à géométrie coaxiale; d) ajout d'une Bibliographie; e) les exemples de mesurages sur un échantillon plan ont été déplacés de l'Article 12 de l'IEC TS 62836 à l'Annexe C.
Merjenje notranjega električnega polja v izolacijskih materialih - Metoda širjenja tlačnega vala (IEC 62836:2024)
Standard IEC 62836:2024 podaja učinkovit in zanesljiv postopek za preskušanje notranjega električnega polja v izolacijskih materialih, ki se uporabljajo pri visoki napetosti, z uporabo metode širjenja tlačnega vala (PWP). Ta postopek je primeren za vzorce s planarno in koaksialno geometrijo s homogenimi izolacijskimi materiali z debelino, ki je večja ali enaka 0,5 mm, ter električnim poljem, ki presega 1 kV/mm, odvisen pa je tudi od debeline vzorca in generatorja tlačnih valov.
Prva izdaja razveljavlja in nadomešča standard IEC TS 62836, objavljen leta 2020.
Ta izdaja v primerjavi s standardom IEC TS 62836 vključuje naslednje pomembne tehnične spremembe:
a) dodana je bila točka 12 o merjenju porazdelitve prostorskega naboja v planarnem vzorcu;
b) dodana je bila točka 13 o vzorcih s koaksialno geometrijo;
c) dodan je bil dodatek D s primeri meritev za vzorce s koaksialno geometrijo;
d) dodano je bilo poglavje Literatura;
e) primeri meritev za planarne vzorce so bili premaknjeni iz točke 12 v standardu IEC TS 62836 v dodatek C.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2024
Merjenje notranjega električnega polja v izolacijskih materialih - Metoda širjenja
tlačnega vala (IEC 62836:2024)
Measurement of internal electric field in insulating materials - Pressure wave propagation
method (IEC 62836:2024)
Messung des inneren elektrischen Feldes in Isoliermaterialien - Methode der
Druckwellenausbreitung (propagation method) (IEC 62836:2024)
Mesurage du champ électrique interne dans les matériaux isolants - Méthode de l'onde
de pression (IEC 62836:2024)
Ta slovenski standard je istoveten z: EN IEC 62836:2024
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62836
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2024
ICS 17.220.99; 29.035.01
English Version
Measurement of internal electric field in insulating materials -
Pressure wave propagation method
(IEC 62836:2024)
Mesurage du champ électrique interne dans les matériaux Messung des inneren elektrischen Feldes in
isolants - Méthode de l'onde de pression Isoliermaterialien - Methode der Druckwellenausbreitung
(IEC 62836:2024) (IEC 62836:2024)
This European Standard was approved by CENELEC on 2024-04-03. 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.
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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
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62836:2024 E
European foreword
The text of document 112/627/FDIS, future edition 1 of IEC 62836, 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 62836:2024.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-01-03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-04-03
document have to be withdrawn
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 62836:2024 was approved by CENELEC as a European
Standard without any modification.
IEC 62836 ®
Edition 1.0 2024-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Measurement of internal electric field in insulating materials – Pressure wave
propagation method
Mesurage du champ électrique interne dans les matériaux isolants – Méthode
de l'onde de pression
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.99, 29.035.01 ISBN 978-2-8322-8338-7
– 2 – IEC 62836:2024 © IEC 2024
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 8
4 Principle of the method . 9
5 Samples . 12
6 Electrode materials . 12
7 Pressure pulse wave generation . 12
8 Set-up of the measurement. 13
9 Calibrating the electric field . 14
10 Measurement procedure . 14
11 Data processing for experimental measurement . 15
12 Space charge distribution measurement . 16
13 Impact of coaxial geometry . 16
13.1 Measuring set-up of pressure wave propagation method for the coaxial
geometry sample . 16
13.2 Physical model in coaxial geometry . 17
13.3 Measuring conditions . 18
13.4 Calibration of electric field for a coaxial sample . 19
13.4.1 Summary . 19
13.4.2 Linearity verification . 19
13.4.3 Validity verification of the ratio between two current peaks . 19
13.4.4 Method for retrieving internal electric field from the measured current
signal . 20
Annex A (informative) Preconditional method of the original signal for the PWP
method on a planar sample . 22
A.1 Simple integration limitation . 22
A.2 Analysis of the resiliency effect and correction procedure . 23
A.3 Example of the correction procedure on a PE sample . 24
A.4 Estimation of the correction coefficients . 25
A.5 MATLAB® code . 27
Annex B (informative) Linearity verification of the measuring system . 29
B.1 Linearity verification . 29
B.2 Sample conditions. 29
B.3 Linearity verification procedure . 29
B.4 Example of linearity verification. 29
Annex C (informative) Measurement examples for planar plaque samples . 32
C.1 Samples. 32
C.2 Pressure pulse generation . 32
C.3 Calibration of sample and signal . 32
C.4 Testing sample and experimental results . 33
C.4.1 Measurement results . 33
IEC 62836:2024 © IEC 2024 – 3 –
C.4.2 Internal electric field distribution in the testing sample . 34
C.4.3 Distribution of space charge density in the testing sample . 36
Annex D (informative) Measurement examples for coaxial geometry samples . 38
D.1 Example of linearity verification of coaxial geometry . 38
D.1.1 Sample conditions . 38
D.1.2 Linearity verification procedure . 38
D.1.3 Example of linearity verification . 38
D.2 Verification of the current peak area ratio between the outer and inner
electrodes . 39
D.2.1 Verification principle . 39
D.2.2 Example of verification of the current peak area ratio . 40
D.3 Testing sample and experimental results . 40
D.3.1 Raw results of measurements . 40
D.3.2 Electric field distribution in the coaxial sample . 42
D.3.3 Space charge distribution in the coaxial sample . 44
Bibliography . 46
Figure 1 – Principle of the PWP method . 11
Figure 2 – Measurement set-up for the PWP method . 13
Figure 3 – Sample of circuit to protect the amplifier from damage by a small discharge
on the sample . 13
Figure 4 – Diagram of the pressure wave propagation method set-up for a coaxial
sample . 17
Figure 5 – Diagram of wave propagation of PWP for a coaxial geometry sample . 17
Figure 6 – Diagram of the propagation of pressure wave on the section of a cylinder . 19
Figure 7 – Flowchart for the computation of the electric field in a coaxial sample from
PWP measured currents . 21
Figure A.1 – Comparison between practical and ideal pressure pulses . 22
Figure A.2 – Original signal of the sample free of charge under moderate voltage . 23
Figure A.3 – Comparison between original and corrected reference signals with a
sample free of charge under moderate voltage . 24
Figure A.4 – Electric field in a sample under voltage with space charge calculated from
original and corrected signals . 25
Figure A.5 – Geometrical characteristics of the reference signal for the correction
coefficient estimation . 26
Figure A.6 – Reference signal corrected with coefficients graphically obtained and
adjusted . 26
Figure A.7 – Electric field in a sample under voltage with space charge calculated with
graphically obtained coefficient and adjusted coefficient .
...
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