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Title: High-voltage electrical apparatus utilizing an insulating gas of sulfur hexafluoride and helium

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.
  1. (Murrysville, PA)
Issue Date:
OSTI Identifier:
Westinghouse Electric Corp. (Pittsburgh, PA) OSTI
Patent Number(s):
US 4190733
Contract Number:
Research Org:
Westinghouse Electric Corp
Country of Publication:
United States
high-voltage; electrical; apparatus; utilizing; insulating; gas; sulfur; hexafluoride; helium; outer; housing; potential; inner; electrode; disposed; respect; thereto; support; means; insulatably; supporting; conducting; particles; contaminate; interior; electrically; insulates; presence; comprised; partial; pressure; atmospheres; absolute; 11; comprises; 20; 65; volume; percent; conducting particles; gas electrically; voltage electrical; inner electrode; sulfur hexafluoride; volume percent; outer housing; support means; partial pressure; insulating gas; electrical apparatus; electrode disposed; apparatus utilizing; respect thereto; insulatably supporting; high-voltage electrical; voltage electric; electrically insulate; /174/252/