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The Decay of Space Charge in a Glassy Epoxy Resin following Voltage Removal.

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posted on 20.08.2008, 14:51 by Len A. Dissado, Virginie Griseri, William Peasgood, Elizabeth S. Cooper, Kaori Fukunaga, John C. Fothergill
The PEA technique is used to measure the distribution of space charge in an epoxy resin after polarisation for one week at an applied field of 7.14kV/mm over a range of temperatures. The decay of the space charge is followed for times up to 114 hours after removal of the voltage and analysed in terms of a number of alternative decay mechanisms. It is shown that the rate-determining stage of the decay mechanism is that of a thermally activated process that has been associated with charge de-trapping. At times greater than 102s the de-trapping process behaves as though the space charge field does not exist and the retention time of the space charge depends only upon the depth of the deepest occupied traps and the temperature.

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Citation

IEEE Transactions on Dielectrics and Electrical Insulation, 2006, 13 (4), pp. 903-916.

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IEEE Transactions on Dielectrics and Electrical Insulation

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

issn

1070-9878

Copyright date

2006

Available date

20/08/2008

Publisher version

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1667752

Language

en

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