Electricity: conductors and insulators – With fluids or vacuum – Conduits – cables and conductors
Patent
1977-06-21
1980-02-26
Pitlick, Harris A.
Electricity: conductors and insulators
With fluids or vacuum
Conduits, cables and conductors
174 14R, 174 16B, 252 635, H01B 356
Patent
active
041907337
ABSTRACT:
High-voltage electrical apparatus includes an outer housing at low potential, an inner electrode disposed within the outer housing at high potential with respect thereto, and support means for insulatably supporting the inner electrode within the outer housing. Conducting particles contaminate the interior of the outer housing, and an insulating gas electrically insulates the inner electrode from the outer housing even in the presence of the conducting particles. The insulating gas is comprised of sulfur hexafluoride at a partial pressure of from about 2.9 to about 3.4 atmospheres absolute, and helium at a partial pressure from about 1.1 to about 11.4 atmospheres absolute. The sulfur hexafluoride comprises between 20 and 65 volume percent of the insulating gas.
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patent: 3792188 (1974-02-01), Cronin
patent: 3864507 (1975-02-01), Fox et al.
Cookson et al., "Movement of Filamentary Conducting Particles under AC Voltages in High Pressure Gases", Int'l Symposium on High Voltage Technology, Zurich 1975, pp. 416-420.
Ryan et al., "Factors Affecting the Insulation Strength of SF.sub.6 Filled Systems", C.I.G.R.E paper 15-02, 1976 session.
Pitlick Harris A.
Westinghouse Electric Corp.
Yatsko M. S.
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