Pre-breakdown Characteristics of Contaminated Power Transformer Oil
Pre-breakdown Characteristics of Contaminated Power Transformer Oil
In this paper we have studied pre-breakdown characteristics of transformer oil in the presence of different levels of contamination. The contaminant is fibrous dust from pressboard insulation used for high voltage transformers. The contamination level investigated in the present study ranges from 0.0025 to 0.0075% by weight. The conduction current under dc voltages were recorded and bridging effect was monitored using optical images. It has been found that the conduction current typically increases with the applied voltage, the duration of the voltage application and the level of contamination. Optical images revealed that bridging occurs when oil is subjected to the voltage and bridge dimension increases with the contamination level and the duration. The current flowing between the two spherical electrodes is closely related to the bridging dynamics.
Transformer oil, bridging phenomenon, conduction current, pre-breakdown, contamination, insulation
1-4244-1481-4
659-662
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zuber, H M
56db8e42-ac10-4bb1-a80c-63dc1d902240
2007
Chen, G
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zuber, H M
56db8e42-ac10-4bb1-a80c-63dc1d902240
Chen, G and Zuber, H M
(2007)
Pre-breakdown Characteristics of Contaminated Power Transformer Oil.
Conference on Electrical Insulation and Dielectric Phenomena, Vancouver, British Columbia, Canada.
14 - 17 Oct 2007.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
In this paper we have studied pre-breakdown characteristics of transformer oil in the presence of different levels of contamination. The contaminant is fibrous dust from pressboard insulation used for high voltage transformers. The contamination level investigated in the present study ranges from 0.0025 to 0.0075% by weight. The conduction current under dc voltages were recorded and bridging effect was monitored using optical images. It has been found that the conduction current typically increases with the applied voltage, the duration of the voltage application and the level of contamination. Optical images revealed that bridging occurs when oil is subjected to the voltage and bridge dimension increases with the contamination level and the duration. The current flowing between the two spherical electrodes is closely related to the bridging dynamics.
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CEIDP2007_paper_2.pdf
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More information
Published date: 2007
Additional Information:
Event Dates: October 14 - 17, 2007
Venue - Dates:
Conference on Electrical Insulation and Dielectric Phenomena, Vancouver, British Columbia, Canada, 2007-10-14 - 2007-10-17
Keywords:
Transformer oil, bridging phenomenon, conduction current, pre-breakdown, contamination, insulation
Organisations:
Electronics & Computer Science, EEE
Identifiers
Local EPrints ID: 264706
URI: http://eprints.soton.ac.uk/id/eprint/264706
ISBN: 1-4244-1481-4
PURE UUID: 34fb76be-7868-484b-9f46-1090bc7704b8
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Date deposited: 20 Oct 2007
Last modified: 14 Mar 2024 07:55
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Contributors
Author:
G Chen
Author:
H M Zuber
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