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Evaluation of the Onset of Space Charge and Electroluminescence as a Marker for Cross-Linked Polyethylene Ageing.

By A. See, John C. Fothergill, Len A. Dissado, G.C. Stevens, G.C. Montanari, Christian Laurent and Gilbert Teyssedre


This paper was presented at the 4th International Conference on Electric Charge in Solid Insulators (CSC4), 2-6 July 2001 and published as pp. 185-188 of the Proceedings. The final version may be available from aim of the “ARTEMIS” project is to investigate the ageing mechanisms for cross-linked polyethylene under thermo-electrical stress and to identify ageing markers, which can be used to carry out diagnostic procedures. A carefully selected set of techniques which can give cross-correlated information on space charge phenomenology and material degradation were used to investigate specimens peeled from reference and aged cables. The paper shows that ageing induces a change in the density and depth of trapping levels, and an increase in the number and size of mesovoids. Interpretation of these results is discussed in terms of physico-chemical modifications, which can affect trap distribution and microstructure

Publisher: Société Française du Vide
Year: 2001
OAI identifier:

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