Additives for enhancing corona stabilization in electronegative

Details Additives for enhancing corona stabilization in electronegative Additives for enhancing corona stabilization in electronegative

1982-04-05

1983-10-18

Kittle, John E.

Compositions

Fluent dielectric

Gaseous or gas-containing

174 17GF, 174 25G, H01B 316

Patent

active

044104561

ABSTRACT:
Corona stabilization in electronegative gases such as SF.sub.6 is enhanced through the use of additives exhibiting ionization potentials which lie in the range in which the photon absorption characteristic of the electronegative insulating gas, as a function of ionization energy, exhibits minimal values. Accordingly, the present invention not only discloses such methods for enhancing corona stabilization but also discloses gaseous mixtures exhibiting this enhanced corona stabilization characteristic. Enhanced corona stabilization is important in that it produces significantly increased divergent field breakdown voltages in the gaseous mixture in gas pressure ranges which are of significant interest to the electrical industry. In particular, it is seen herein that tri-ethylamine is a particularly effective additive for use with SF.sub.6.

REFERENCES:
patent: 1886153 (1932-11-01), Perrotti
patent: 3209063 (1965-09-01), Eiseman, Jr.
patent: 3249681 (1966-05-01), Eiseman, Jr.
patent: 3281521 (1966-10-01), Wilson
"A Model for the Breakdown for SF.sub.6 in the Presence of Positive Impulse Corona", Third International Symposium on High Voltage Engineering, Aug. 28-31, 1979, Milan, Italy.
"Corona Stabilization and the Critical Pressure in SF.sub.6 and SF.sub.6 /N.sub.2 Mixtures", O. Farish, R. C. Davidson and D. J. Tedford, 1977.
"Prebreakdown Corona Processes in SF.sub.6 and SF.sub.6 /N.sub.2 Mixtures", O. Farish, O. E. Ibrahim, A. Kurimoto, Third International Symposium on High Voltage Engineering, Aug. 28-31, 1979, Milan, Italy.
"Static Field Anode Corona Characteristics in Sulfur Hexafluoride", R. Hazel, E. Kuffel, IEEE Transactions on Power Apparatus and Systems, vol. PAS-95, No. 1, Jan./Feb., 1976.
"Absolute Oscillator Strengths (5-6 eV) for Photoabsorption and Ionic Fragmentation of SF.sub.6 ", A. P. Hitchcock, M. J. VanderWiel, Journal of Physics B: Atomic and Molecular Physics, vol. 12, No. 13, 1979.

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