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Characterization of silicone oil used in HV cable sealing ends

Characterization of silicone oil used in HV cable sealing ends
Characterization of silicone oil used in HV cable sealing ends
Existing polymeric cable sealing end (CSE) typically contain silicone oil as an insulating liquid between the cable core and the outside of the CSE. In recent years, a number of performance issues have been identified with silicone oil filled CSEs. To understand the reasons for the observed behavior of silicone oil, a range of characterization methods are reviewed, to allow investigation of the influence of moisture, potential chemical contaminants and the compatibility with CSE materials. The water content of all the oils studied was above the limit given in IEC 60836 (2015) for new silicone oil. There is no significant difference between the moisture content, whether the oil is used in CSE or new. Neither did the Fourier infrared (FTIR) spectroscopic analysis show difference between the oils. Preliminary results from gas chromatography connected to mass spectrometer (GC/MS) clearly show structural differences between unused expired oil and new oil samples particularly that species suspected to be cyclic siloxane appear to be present in the expired sample.
Virtanen, Suvi Tiia Hannele
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Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Pilgrim, James
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Wheatley, David
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Brown, Richard C.D.
21ce697a-7c3a-480e-919f-429a3d8550f5
Langley, G. John
7ac80d61-b91d-4261-ad17-255f94ea21ea
Cwikowski, Oliver
ddb7547b-f9b5-48d6-9c2f-f7f332e0495d
Virtanen, Suvi Tiia Hannele
5f98459d-e6b8-45d4-bdf8-85d264b3f43a
Callender, George
4189d79e-34c3-422c-a601-95b156c27e76
Andritsch, Thomas
8681e640-e584-424e-a1f1-0d8b713de01c
Pilgrim, James
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Wheatley, David
259931a5-d5a7-4400-80c9-2a7e8d161a74
Brown, Richard C.D.
21ce697a-7c3a-480e-919f-429a3d8550f5
Langley, G. John
7ac80d61-b91d-4261-ad17-255f94ea21ea
Cwikowski, Oliver
ddb7547b-f9b5-48d6-9c2f-f7f332e0495d

Virtanen, Suvi Tiia Hannele, Callender, George, Andritsch, Thomas, Pilgrim, James, Wheatley, David, Brown, Richard C.D., Langley, G. John and Cwikowski, Oliver (2019) Characterization of silicone oil used in HV cable sealing ends. 26th Nordic Insulation Symposium: Materials, Components and Diagnostics, Finland. 12 - 14 Jun 2019. 4 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Existing polymeric cable sealing end (CSE) typically contain silicone oil as an insulating liquid between the cable core and the outside of the CSE. In recent years, a number of performance issues have been identified with silicone oil filled CSEs. To understand the reasons for the observed behavior of silicone oil, a range of characterization methods are reviewed, to allow investigation of the influence of moisture, potential chemical contaminants and the compatibility with CSE materials. The water content of all the oils studied was above the limit given in IEC 60836 (2015) for new silicone oil. There is no significant difference between the moisture content, whether the oil is used in CSE or new. Neither did the Fourier infrared (FTIR) spectroscopic analysis show difference between the oils. Preliminary results from gas chromatography connected to mass spectrometer (GC/MS) clearly show structural differences between unused expired oil and new oil samples particularly that species suspected to be cyclic siloxane appear to be present in the expired sample.

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Accepted/In Press date: 16 May 2019
Published date: June 2019
Venue - Dates: 26th Nordic Insulation Symposium: Materials, Components and Diagnostics, Finland, 2019-06-12 - 2019-06-14

Identifiers

Local EPrints ID: 431258
URI: http://eprints.soton.ac.uk/id/eprint/431258
PURE UUID: 23820613-c40f-45ff-aef6-ba38eea33c34
ORCID for Suvi Tiia Hannele Virtanen: ORCID iD orcid.org/0000-0003-0502-3183
ORCID for Thomas Andritsch: ORCID iD orcid.org/0000-0002-3462-022X
ORCID for James Pilgrim: ORCID iD orcid.org/0000-0002-2444-2116
ORCID for Richard C.D. Brown: ORCID iD orcid.org/0000-0003-0156-7087
ORCID for G. John Langley: ORCID iD orcid.org/0000-0002-8323-7235

Catalogue record

Date deposited: 28 May 2019 16:30
Last modified: 12 May 2020 00:34

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Contributors

Author: Suvi Tiia Hannele Virtanen ORCID iD
Author: George Callender
Author: Thomas Andritsch ORCID iD
Author: James Pilgrim ORCID iD
Author: David Wheatley
Author: G. John Langley ORCID iD
Author: Oliver Cwikowski

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