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Investigation into the Formation of Copper Sulphide in Oil Filled Electrical Equipment

Investigation into the Formation of Copper Sulphide in Oil Filled Electrical Equipment
Investigation into the Formation of Copper Sulphide in Oil Filled Electrical Equipment
The deposition of copper sulphide within oil filled high voltage equipment is the symptom of the use of sulphurous oil. In some cases, severe copper sulphide contamination has resulted in expensive equipment failure. It has been shown that sealed equipment, containing sulphurous oils and operating at elevated temperatures, are the more susceptible to the copper sulphide deposits. Recent work has suggested a mechanism for the deposits in the paper covering the copper conductors. Other work has suggested that the deposition may be the result of thermally driven gassing. However, the overall mechanism of copper sulphide formation and its deposition on the copper is still a topic of interest. The problem is complicated by the lack of a complete chemical characterisation of the various industrially available oils. A better understanding of the presence of the sulphur containing chemical species present in the oil and their thermal dependence will give a clearer insight into the mechanism of copper sulphide formation. This may ultimately lead to improved preventative methodologies which can be employed in the future. This paper will detail results from the use of various chemical analysis techniques applied to oil known to cause copper sulphide deposits. The results from X-ray fluorescence, UV/Vis spectroscopy, gas chromatography mass spectrometry and scanning electron microscopy are used in conjunction to reveal how the sulphur and copper concentrations change with the depletion of corrosive action.
978-82-594-3525-5
CD-ROM
Mitchinson, P M
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Holt, A F
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Brown, R C D
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Lewin, P L
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Croudace, I W
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Wilson, G
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Jarman, P
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Mitchinson, P M
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Holt, A F
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Brown, R C D
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Lewin, P L
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Croudace, I W
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Wilson, G
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Jarman, P
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Mitchinson, P M, Holt, A F, Brown, R C D, Lewin, P L, Croudace, I W, Wilson, G and Jarman, P (2011) Investigation into the Formation of Copper Sulphide in Oil Filled Electrical Equipment. 17th IEEE International Conference on Dielectric Liquids, Trondheim, Norway. 25 - 29 Jun 2011. CD-ROM .

Record type: Conference or Workshop Item (Paper)

Abstract

The deposition of copper sulphide within oil filled high voltage equipment is the symptom of the use of sulphurous oil. In some cases, severe copper sulphide contamination has resulted in expensive equipment failure. It has been shown that sealed equipment, containing sulphurous oils and operating at elevated temperatures, are the more susceptible to the copper sulphide deposits. Recent work has suggested a mechanism for the deposits in the paper covering the copper conductors. Other work has suggested that the deposition may be the result of thermally driven gassing. However, the overall mechanism of copper sulphide formation and its deposition on the copper is still a topic of interest. The problem is complicated by the lack of a complete chemical characterisation of the various industrially available oils. A better understanding of the presence of the sulphur containing chemical species present in the oil and their thermal dependence will give a clearer insight into the mechanism of copper sulphide formation. This may ultimately lead to improved preventative methodologies which can be employed in the future. This paper will detail results from the use of various chemical analysis techniques applied to oil known to cause copper sulphide deposits. The results from X-ray fluorescence, UV/Vis spectroscopy, gas chromatography mass spectrometry and scanning electron microscopy are used in conjunction to reveal how the sulphur and copper concentrations change with the depletion of corrosive action.

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More information

Published date: 26 June 2011
Additional Information: Event Dates: 26 -30 June 2011
Venue - Dates: 17th IEEE International Conference on Dielectric Liquids, Trondheim, Norway, 2011-06-25 - 2011-06-29
Organisations: Electronics & Computer Science, EEE

Identifiers

Local EPrints ID: 272565
URI: http://eprints.soton.ac.uk/id/eprint/272565
ISBN: 978-82-594-3525-5
PURE UUID: ccfe6ed8-7f48-4352-a012-1d7334c58ae5
ORCID for P L Lewin: ORCID iD orcid.org/0000-0002-3299-2556

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Date deposited: 12 Jul 2011 14:32
Last modified: 03 Dec 2021 02:34

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Contributors

Author: P M Mitchinson
Author: A F Holt
Author: R C D Brown
Author: P L Lewin ORCID iD
Author: I W Croudace
Author: G Wilson
Author: P Jarman

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