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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.
Inventors:
 [1]
  1. (Murrysville, PA)
Issue Date:
OSTI Identifier:
863265
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
Patent Number(s):
US 4135130
Contract Number:
EX-76-C-01-2125
Research Org:
Westinghouse Electric Corp
Country of Publication:
United States
Language:
English
Subject:
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/