| EPSRC Reference: |
GR/L38851/01 |
| Title: |
THE SURFACE DIELECTRIC STRENGTH OF INSULATING MATERIALS IN GASES |
| Principal Investigator: |
Warren, Dr L |
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| Department: |
Electrical Engineering & Electronics |
| Organisation: |
UMIST |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 June 1997 |
Ends: |
31 July 2000 |
Value (£): |
139,410
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| Energy |
No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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This proposal addresses the mechanisms which determine the dielectric strength of the surface of an insulating material. the strength depends on the interaction between the surface and discharges occurring in the adjacent gas. There is a lack on unambiguous data available which allows quantitative pictures to be drawn. In this work, new data on surface streamer properties and on underlying ionisation processes, will be obtained by combining techniques for charge injection and surface charge measurement with a technique base don light emission, used previously under Grant GR/H72946. Streamer propagation will be measured as a function of electric field, dielectric material, surface geometry, surface pre-charging and chemical change due to service conditions. Current, charge, speed of propagation, surface charge profiles and spatial distribution will provide data which, combined with studies of the transition to corona and flashover, will be applied to important industrial problems. For this purpose, industry is providing: a puffer circuit breaker test facility for work on flashover problems under inverse transient voltages; cast-resin encapsulated transformer for work on anomalous surface flashover and puncture; computing time for three-dimensional electric field computation; pressure vessel for use with SF6; materials for assessment and for basic research.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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