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Permittivity mismatch and its influence on ramp breakdown performance

Permittivity mismatch and its influence on ramp breakdown performance
Permittivity mismatch and its influence on ramp breakdown performance
Ramp breakdown tests remain a useful method for characterizing polymeric materials. In the current paper the effects of sample and oil permittivity and electrode radius on measured DC breakdown strength are explored, with the aid of finite element modeling. Localised field enhancement appears to explain apparent decreases in electrical breakdown strength whereas the shape parameter in the Weibull distribution appears to be related to the size of electrically stressed area relative to the electrode radius. Care needs to be taken to choose an oil of equal or higher permittivity than the sample to be tested and to use a fixed electrode geometry and a fixed voltage ramp rate to ensure such tests are valid for comparative studies.
978-1-4673-4459-3
644-647
Hosier, I L
6a44329e-b742-44de-afa7-073f80a78e26
Vaughan, A S
6d813b66-17f9-4864-9763-25a6d659d8a3
Chippendale, R D
d886843e-2890-4942-a56b-b06af599de45
Hosier, I L
6a44329e-b742-44de-afa7-073f80a78e26
Vaughan, A S
6d813b66-17f9-4864-9763-25a6d659d8a3
Chippendale, R D
d886843e-2890-4942-a56b-b06af599de45

Hosier, I L, Vaughan, A S and Chippendale, R D (2013) Permittivity mismatch and its influence on ramp breakdown performance. IEEE 2013 International Conference on Solid Dielectrics (ICSD), Italy. 29 Jun - 03 Jul 2013. pp. 644-647 .

Record type: Conference or Workshop Item (Paper)

Abstract

Ramp breakdown tests remain a useful method for characterizing polymeric materials. In the current paper the effects of sample and oil permittivity and electrode radius on measured DC breakdown strength are explored, with the aid of finite element modeling. Localised field enhancement appears to explain apparent decreases in electrical breakdown strength whereas the shape parameter in the Weibull distribution appears to be related to the size of electrically stressed area relative to the electrode radius. Care needs to be taken to choose an oil of equal or higher permittivity than the sample to be tested and to use a fixed electrode geometry and a fixed voltage ramp rate to ensure such tests are valid for comparative studies.

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Published date: 30 June 2013
Venue - Dates: IEEE 2013 International Conference on Solid Dielectrics (ICSD), Italy, 2013-06-29 - 2013-07-03
Organisations: EEE

Identifiers

Local EPrints ID: 354565
URI: http://eprints.soton.ac.uk/id/eprint/354565
ISBN: 978-1-4673-4459-3
PURE UUID: 9de4fddc-77c2-4c9e-9c91-b591086672c6
ORCID for I L Hosier: ORCID iD orcid.org/0000-0003-4365-9385
ORCID for A S Vaughan: ORCID iD orcid.org/0000-0002-0535-513X

Catalogue record

Date deposited: 12 Jul 2013 15:55
Last modified: 07 Oct 2020 01:49

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Contributors

Author: I L Hosier ORCID iD
Author: A S Vaughan ORCID iD
Author: R D Chippendale

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