The University of Southampton
University of Southampton Institutional Repository

Thermal and electrical ageing of silicone oil

Hosier, I.L., Vaughan, A.S., Swingler, S.G. and Moss, G (2009) Thermal and electrical ageing of silicone oil At International Symposium on High Voltage Engineering, South Africa. 24 - 28 Aug 2009. 5 pp, pp. 1-5.

Record type: Conference or Workshop Item (Other)


Silcone oil provides an excellent self healing liquid insulation system for high voltage applications, combining good dielectric properties with the ability to operate at very high temperatures. As such, it lends itself to applications outside the reach of conventional hydrocarbon based oils; however, its ageing behaviour is relatively poorly understood. In these investigations, a model silicone oil has been subjected to both thermal and electrical ageing. The resulting aged oils have been studied by UV/Vis, infrared and dielectric spectroscopy techniques supplemented by measurements of viscosity. Thermal ageing results in no visible changes to the oils whereas electrical ageing causes the oil to become clouded. Under the conditions used in these experiments, electrical ageing results in a far greater change to the dielectric properties than thermal ageing. Increased viscosity and oxidation can accompany thermal ageing which was not observed after electrical ageing. The two ageing routes therefore produce quite different effects.

PDF ISH_C-8.pdf - Other
Restricted to Registered users only
Download (416kB)

More information

Published date: August 2009
Additional Information: In the proceedings the paper appears as C-8
Venue - Dates: International Symposium on High Voltage Engineering, South Africa, 2009-08-24 - 2009-08-28
Organisations: EEE


Local EPrints ID: 267847
PURE UUID: 5dc3fffa-aa3a-441e-b8b6-d8a732648976
ORCID for I.L. Hosier: ORCID iD

Catalogue record

Date deposited: 10 Sep 2009 12:43
Last modified: 18 Jul 2017 06:59

Export record


Author: I.L. Hosier ORCID iD
Author: A.S. Vaughan
Author: S.G. Swingler
Author: G Moss

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 supports OAI 2.0 with a base URL of

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.