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Dynamic AC surface discharge characteristics of PMMA and LDPE

Dynamic AC surface discharge characteristics of PMMA and LDPE
Dynamic AC surface discharge characteristics of PMMA and LDPE
Polymeric materials such as Low Density Polyethylene (LDPE) and Polymethylmethacrylate (PMMA) have properties that are ideal for use as electrical insulating materials within a wide range of commercial products. They have good mechanical properties and the advantages of high electrical breakdown strength, high electrical resistivity and low dielectric loss. In many practical applications involving the use of insulation, high electrical stresses can be generated at the edges of the interface between a conductor and the solid insulation by the existence of a non-uniform electric field. This may cause local sparking and or corona along the surface of the insulation. The presence of surface discharge activity is a significant problem for polymeric insulators. Any discharge can cause a slow deterioration of the insulator surface in the long term through three mechanisms: firstly through slow erosion by ionic bombardment of ions in the sparks, secondly by chemical degradation of the insulation material and thirdly from carbonisation of the material surface. Conducting deposits are formed on the surface and this will influence the electrical characteristics of the insulator. The development of a suitable method to monitor surface discharge behaviour of high voltage insulating materials is therefore of particular interest.
0780363523
159-162
Sam, Y.L.
5bf15c63-43a4-4fd0-8843-47f2f5bb0a0b
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Davies, A.E.
56d95222-b259-494a-92e9-68b090ec0dcd
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Sutton, S.J.
571c7136-1eb6-44e1-8979-ca0829469a6b
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Sam, Y.L.
5bf15c63-43a4-4fd0-8843-47f2f5bb0a0b
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Davies, A.E.
56d95222-b259-494a-92e9-68b090ec0dcd
Wilkinson, J.S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Sutton, S.J.
571c7136-1eb6-44e1-8979-ca0829469a6b
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735

Sam, Y.L., Lewin, P.L., Davies, A.E., Wilkinson, J.S., Sutton, S.J. and Swingler, S.G. (2001) Dynamic AC surface discharge characteristics of PMMA and LDPE. ICSD '01. Proceedings of the 2001 IEEE 7th International Conference on Solid Dielectrics, Netherlands. 25 - 29 Jun 2001. pp. 159-162 . (doi:10.1109/ICSD.2001.955574).

Record type: Conference or Workshop Item (Paper)

Abstract

Polymeric materials such as Low Density Polyethylene (LDPE) and Polymethylmethacrylate (PMMA) have properties that are ideal for use as electrical insulating materials within a wide range of commercial products. They have good mechanical properties and the advantages of high electrical breakdown strength, high electrical resistivity and low dielectric loss. In many practical applications involving the use of insulation, high electrical stresses can be generated at the edges of the interface between a conductor and the solid insulation by the existence of a non-uniform electric field. This may cause local sparking and or corona along the surface of the insulation. The presence of surface discharge activity is a significant problem for polymeric insulators. Any discharge can cause a slow deterioration of the insulator surface in the long term through three mechanisms: firstly through slow erosion by ionic bombardment of ions in the sparks, secondly by chemical degradation of the insulation material and thirdly from carbonisation of the material surface. Conducting deposits are formed on the surface and this will influence the electrical characteristics of the insulator. The development of a suitable method to monitor surface discharge behaviour of high voltage insulating materials is therefore of particular interest.

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More information

Published date: June 2001
Venue - Dates: ICSD '01. Proceedings of the 2001 IEEE 7th International Conference on Solid Dielectrics, Netherlands, 2001-06-25 - 2001-06-29
Organisations: Optoelectronics Research Centre, EEE

Identifiers

Local EPrints ID: 52059
URI: http://eprints.soton.ac.uk/id/eprint/52059
ISBN: 0780363523
PURE UUID: d0bb72e8-a48c-4290-83f7-4f8ad15750b4
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

Catalogue record

Date deposited: 10 Jun 2008
Last modified: 26 Nov 2019 02:08

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Contributors

Author: Y.L. Sam
Author: P.L. Lewin
Author: A.E. Davies
Author: J.S. Wilkinson ORCID iD
Author: S.J. Sutton
Author: S.G. Swingler

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