The University of Southampton
University of Southampton Institutional Repository

Investigation on local field enhancement of a typical three electrode system in DC conductivity measurement

Investigation on local field enhancement of a typical three electrode system in DC conductivity measurement
Investigation on local field enhancement of a typical three electrode system in DC conductivity measurement
In the evaluation of insulating materials, the design and choice of the electrode system in which the insulating material is to be measured would play a crucial role. There are various electrode systems provided by the current IEC and ASTM standard. In this paper, influence from the shape of a circular metallic electrode with guard ring, which is very common in DC conductivity measurement for its simple structure, is investigated. Mineral oil with different aging times are tested using this electrode system.
According to IEC and ASTM standard, there are four parameters of this electrode system that can affect the DC conductivity measurement, distance between two electrodes, distance between guard and guarded electrode, outer radius of the guard ring and the outer radius of the guarded electrode. Here, we are going to add a new parameter, the edge radius to the system, which is not mentioned in current standards but is quite important in liquid dielectrics measurement. The experimental result shows that increase the edge radius can lead to a higher applied voltage in DC conductivity measurement.
The distribution of electric strength of this electrode system is simulated by Comsol Multiphysics. As seen from the simulating result, there would be a point that has much higher electric strength near the edge of the guard and guarded electrode. If the edges of these two electrodes are very sharp, the maximum electric strength in the test cell will increase. A recommendation has been made to current standard in liquid measurement. Besides, since there is a new parameter in this system, the conductivity calculated from the electric strength in the gap is compared with the value obtained from the equation of international standards.
17
Zhou, Y
2dd820ca-fb03-496b-8a45-f2a11816c4b5
Hao, M
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wilson, G
25fbd90e-6949-481c-9e75-0d457003c839
Jarman, P
390aafbd-393e-4e20-bace-b4416e0dd456
Zhou, Y
2dd820ca-fb03-496b-8a45-f2a11816c4b5
Hao, M
fb7006e0-07c0-46f5-9279-e30a7d3bd614
Chen, G.
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Wilson, G
25fbd90e-6949-481c-9e75-0d457003c839
Jarman, P
390aafbd-393e-4e20-bace-b4416e0dd456

Zhou, Y, Hao, M, Chen, G., Wilson, G and Jarman, P (2013) Investigation on local field enhancement of a typical three electrode system in DC conductivity measurement. Dielectrics 2013, Reading, United Kingdom. 09 - 11 Apr 2013. p. 17 .

Record type: Conference or Workshop Item (Paper)

Abstract

In the evaluation of insulating materials, the design and choice of the electrode system in which the insulating material is to be measured would play a crucial role. There are various electrode systems provided by the current IEC and ASTM standard. In this paper, influence from the shape of a circular metallic electrode with guard ring, which is very common in DC conductivity measurement for its simple structure, is investigated. Mineral oil with different aging times are tested using this electrode system.
According to IEC and ASTM standard, there are four parameters of this electrode system that can affect the DC conductivity measurement, distance between two electrodes, distance between guard and guarded electrode, outer radius of the guard ring and the outer radius of the guarded electrode. Here, we are going to add a new parameter, the edge radius to the system, which is not mentioned in current standards but is quite important in liquid dielectrics measurement. The experimental result shows that increase the edge radius can lead to a higher applied voltage in DC conductivity measurement.
The distribution of electric strength of this electrode system is simulated by Comsol Multiphysics. As seen from the simulating result, there would be a point that has much higher electric strength near the edge of the guard and guarded electrode. If the edges of these two electrodes are very sharp, the maximum electric strength in the test cell will increase. A recommendation has been made to current standard in liquid measurement. Besides, since there is a new parameter in this system, the conductivity calculated from the electric strength in the gap is compared with the value obtained from the equation of international standards.

Text
Abstract - Yuan2.pdf - Other
Download (96kB)
Text
Oral - Yuan2.pdf - Other
Download (969kB)

More information

Published date: 10 April 2013
Venue - Dates: Dielectrics 2013, Reading, United Kingdom, 2013-04-09 - 2013-04-11
Organisations: EEE

Identifiers

Local EPrints ID: 352384
URI: http://eprints.soton.ac.uk/id/eprint/352384
PURE UUID: 78cbb16c-6ee5-4558-82e7-d0ff32b53816

Catalogue record

Date deposited: 10 May 2013 15:02
Last modified: 07 Jul 2020 16:51

Export record

Contributors

Author: Y Zhou
Author: M Hao
Author: G. Chen
Author: G Wilson
Author: P Jarman

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×