New Developments in Solid Dielectric Life Extension Technology
2004 International Symposium on Electrical Insulation (ISEI)
by Glen J. Bertini
September 19, 2004
A novel approach to solid dielectric enhancement technology, which includes new installation methods and new materials to extend the life of power cables, is described. Theory and experiments are discussed which demonstrate that the new approach addresses all of the current shortcomings associated with the first generation technology. In comparison to the technology employed over the last two decades, the new technology provides: (1) More rapid short-term reliability – the post-injection dielectric performance improvement slope is greater than an order of magnitude steeper, (2) longer rejuvenated cable life approaching the 40 year expected life for the highest performance modern cable designs, (3) an inherently safer installation, including lower flammability fluids, which have flash points in excess of 65°C, and an injection paradigm, which dramatically reduces the likelihood of electrical contact, and (4) compatibility with all aluminum alloy and copper alloy conductors.
- 87-fold improvement in short-term performance
- Much longer reliable cable life
- Greatly reduced exposure to fire and explosion hazards plaguing older technology
- Improved injection paradigm yields 3X less exposure to energized equipment
- Improved compatibility with aluminum conductors
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