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Effect of electrical and thermal ageing on the breakdown strength of silicone oil

Effect of electrical and thermal ageing on the breakdown strength of silicone oil
Effect of electrical and thermal ageing on the breakdown strength of silicone oil
The electrical and thermal ageing behavior of silicone oil was considered in these investigations. The two ageing methods had very different physical effects; electrical ageing resulted in darkening of the oils but with no gelling (increased viscosity), whereas thermal ageing did not produce darkening but could produce gelling. Whilst ageing tended to reduce the AC breakdown strength and increased the electrical conductivity, one set of thermally aged oils, whose viscosity increased after thermal ageing, exhibited increased breakdown strength. The unexpected effects of oil viscosity on AC breakdown strength were confirmed in separate experiments on an oil of a higher viscosity.
Hosier, I.L.
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Ma, H
9c6b38b3-9f4a-4af7-9bf5-0c35a733b53f
Vaughan, A. S.
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Hosier, I.L.
6a44329e-b742-44de-afa7-073f80a78e26
Ma, H
9c6b38b3-9f4a-4af7-9bf5-0c35a733b53f
Vaughan, A. S.
6d813b66-17f9-4864-9763-25a6d659d8a3

Hosier, I.L., Ma, H and Vaughan, A. S. (2014) Effect of electrical and thermal ageing on the breakdown strength of silicone oil. 18th IEEE International Conference on Dielectric Liquids, Slovenia. 30 Jun - 03 Jul 2014. 4 pp .

Record type: Conference or Workshop Item (Other)

Abstract

The electrical and thermal ageing behavior of silicone oil was considered in these investigations. The two ageing methods had very different physical effects; electrical ageing resulted in darkening of the oils but with no gelling (increased viscosity), whereas thermal ageing did not produce darkening but could produce gelling. Whilst ageing tended to reduce the AC breakdown strength and increased the electrical conductivity, one set of thermally aged oils, whose viscosity increased after thermal ageing, exhibited increased breakdown strength. The unexpected effects of oil viscosity on AC breakdown strength were confirmed in separate experiments on an oil of a higher viscosity.

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Published date: 30 June 2014
Venue - Dates: 18th IEEE International Conference on Dielectric Liquids, Slovenia, 2014-06-30 - 2014-07-03
Organisations: EEE

Identifiers

Local EPrints ID: 367956
URI: http://eprints.soton.ac.uk/id/eprint/367956
PURE UUID: 6b9677e3-68c1-41e1-8a52-1967e96fea6f
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

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Date deposited: 12 Aug 2014 10:12
Last modified: 26 Nov 2019 01:53

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Contributors

Author: I.L. Hosier ORCID iD
Author: H Ma
Author: A. S. Vaughan ORCID iD

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