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Author Bulinski, A.T. ♦ Bamji, S.S. ♦ Densley, R.J. ♦ Crine, J.-P. ♦ Noirhomme, B. ♦ Bernstein, B.S.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1989
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics
Subject Keyword Oxidation ♦ Trees - insulation ♦ Atmosphere ♦ Fourier transforms ♦ Infrared spectra ♦ Underwater cables ♦ Insulation testing ♦ Cable insulation ♦ Electric breakdown ♦ Performance evaluation
Abstract The authors have undertaken a detailed Fourier transform infrared spectroscopy study of more than 250 water trees from more than twenty field-aged cables supplied by different utilities in the US and Canada. Most of these cables, removed from service after six to fifteen years, contained large water trees. The results give an ambiguous picture of the role of oxidation on water treeing. The experimental difficulties in the detection and evaluation of the amount of oxidation in water trees are discussed. The results of water tree growth tests on XLPE cable insulation preoxidized in air to the level similar to that observed in field-aged cables after many years of service show that increased oxidation does not affect the initiation of vented water trees but it does affect the water tree growth rate. This is very important as it may result in significantly reduced times to breakdown in actual cables. Results of water tree tests performed in a nitrogen atmosphere are also presented. The initiation of vented water trees was not affected by the gas atmosphere, but the trees grew twice as fast as in air.<<ETX>>
Description Author affiliation: Nat. Res. Council of Canada, Ottawa, Ont., Canada (Bulinski, A.T.; Bamji, S.S.; Densley, R.J.)
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1989-07-03
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 234.41 kB
Page Count 5
Starting Page 422
Ending Page 426

Source: IEEE Xplore Digital Library