S2F10 in SF6 Insulated Equipment
The highly toxic SF6 decomposition product S2F10 is suspected to constitute a health risk associated with gas insulated equipment. In this paper a method is presented by which maximal S2F10 concentrations in operating GIS can be estimated under worst case conditions. The method is based on simple integral discharge models and makes use of the results of the CRADA activity. It is found that neither partial discharge activity nor disconnector switching can lead to risk relevant S2F10 concentrations.
KeywordsSurface Decomposition Volume Decomposition Contact Separation Exponential Decay Time Gaseous Dielectric
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- 2.H. D. Morrison, F. Y. Chu et al., “Decomposition of SF6 and production of S2F10 in power arcs”, 7th Internat. Sympos. on Gaseous Dielectrics, Knoxville TE, 1994Google Scholar
- 4.R.J. Van Brunt, J.K. Olthoff, and Manish Shah, “Rate of S2F10 Production from Negative Corona in Compressed SF6”, Conference Record of the 1992 IEEE Int. Symp. Elec. Insul., June 7–10, 1992, Baltimore, IEEE Pub. No. 92CH3150-0, pp. 328-331, 1992Google Scholar
- 5.I. Sauers and S.M. Mahajan, and R. Cacheiro, “Production of S2F10, S2OF10, and S2O2F10 by spark discharges in SF6”, 7th Internat. Sympos. on Gaseous Dielectrics, Knoxville TE, 1994Google Scholar
- 6.I. Sauers, S. M. Mahajan, et al., “Effect of solid insulator on the spark yield of S2F10 in SF6”, 1994 IEEE Intern. Sympos. on Electr. Insul., Pittsburgh PA, 1994Google Scholar
- 7.H. D. Morrison, V. P. Cronin et al., “Production and decay of S2F10 in a disconnect switch”, 7th Internat. Sympos. on Gaseous Dielectrics, Knoxville TE, 1994Google Scholar
- 8.J.T. Herron and Wing Tsang, “Formation and Stability of SF5 and S2F10”, 5th Intern. Sympos. on Gaseous Dielectrics, Knoxville, 199 (1987)Google Scholar
- 10.M. Piemontesi, R. Pietsch, and W. Zaengl, “Analysis of Decomposition Products of Sulphur Hexafluoride in Negative DC Corona with Special Emphasis on Content of H2O and Q2”, IEEE Internat. Sympos. on Electr. Insulation. Pittsburgh 1994Google Scholar
- 11.J.K. Olthoff, R.J. Van Brunt, J.T. Herron, I. Sauers, and G. Harman, “Catalytic Decomposition of S2F10 and Its Implication on Sampling and Detection from SF6-Insulated Equipment”, Conference Record of the 1990 IEEE International Symposium on Electrical Insulation, Toronto, June 3–6. 1990, IEEE Pub. No. 90-CH2727-6, pp. 248-252Google Scholar
- 12.G. Basile, private communicationGoogle Scholar
- 13.M. Piemontesi, private communicationGoogle Scholar
- 15.I. Sauers, M. Siddanagupta et al., “Production and stability of S2F10 in SF6 corona discharges”, 6th ISH, New Orleans (1989) 23.08Google Scholar
- 16.CIGRE WG 33/13-09, “Very fast transient phenomena associated with gas insulated substations”, CIGRE (1988) paper 33-13.Google Scholar