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Title: Method of testing gas insulated systems for the presence of conducting particles utilizing a gas mixture of nitrogen and sulfur hexafluoride

A method of testing a gas insulated system for the presence of conducting particles. The method includes inserting a gaseous mixture comprising about 98 volume percent nitrogen and about 2 volume percent sulfur hexafluoride into the gas insulated system at a pressure greater than 60 lb./sq. in. gauge, and then applying a test voltage to the system. If particles are present within the system, the gaseous mixture will break down, providing an indicator of the presence of the particles.
  1. (Murrysville, PA)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) OSTI
Patent Number(s):
US 4135130
Contract Number:
Research Org:
Westinghouse Electric Corp
Country of Publication:
United States
method; testing; gas; insulated; systems; presence; conducting; particles; utilizing; mixture; nitrogen; sulfur; hexafluoride; inserting; gaseous; comprising; 98; volume; percent; pressure; 60; lb; sq; gauge; applying; voltage; break; providing; indicator; conducting particles; sulfur hexafluoride; volume percent; gaseous mixture; gas mixture; gas insulated; mixture comprising; testing gas; particles utilizing; /324/174/252/