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Insulator Leakage Distance Dimensioning in Areas of Winter Contamination using Cold-fog Test Results.
- Source :
-
IEEE Transactions on Dielectrics & Electrical Insulation . Dec2007, Vol. 14 Issue 6, p1455-1461. 7p. 1 Black and White Photograph, 1 Chart, 1 Graph. - Publication Year :
- 2007
-
Abstract
- Electrical utilities have adapted insulator leakage distances to a wide range of contamination environments. This has led to development of guidelines for unified specific creepage distance, for example in IEC 60815. Under freezing conditions, a number of factors change. The surface conductivity of ice is much lower than that of water, but there is the countervailing possibility of accumulating a significant amount of ice. One of the crossover points between applications occurs when a very light layer of hoar frost or freezing fog, simulated in a "cold fog" test, fully wets a pre- contaminated insulator. The leakage distance requirements for these conditions are compared with those suggested for conventional clean-fog requirements. The possibility of treating fog accretion as a form of non-soluble deposit density is explored. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10709878
- Volume :
- 14
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Dielectrics & Electrical Insulation
- Publication Type :
- Academic Journal
- Accession number :
- 27950560
- Full Text :
- https://doi.org/10.1109/TDEI.2007.4401228