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Title: High voltage capability electrical coils insulated with materials containing SF.sub.6 gas

A coil is made having a plurality of layers of adjacent metal conductor windings subject to voltage stress, where the windings have insulation therebetween containing a small number of minute disposed throughout its cross-section, where the voids are voids filled with SF.sub.6 gas to substitute for air or other gaseous materials in from about 60% to about 95% of the cross-sectional void volume in the insulation, thus incorporating an amount of SF.sub.6 gas in the cross-section of the insulation effective to substantially increase corona inception voltages.
 [1];  [2];  [1];  [3]
  1. (Muncie, IN)
  2. (Penn Township, Allegheny County, PA)
  3. (Acme, PA)
Issue Date:
OSTI Identifier:
United States of America as represented by United States (Washington, DC) OSTI
Patent Number(s):
US 4751488
Contract Number:
Country of Publication:
United States
voltage; capability; electrical; coils; insulated; materials; containing; sf; gas; coil; plurality; layers; adjacent; metal; conductor; windings; subject; stress; insulation; therebetween; minute; disposed; throughout; cross-section; voids; filled; substitute; air; gaseous; 60; 95; cross-sectional; void; volume; incorporating; amount; effective; substantially; increase; corona; inception; voltages; adjacent metal; void volume; materials containing; metal conductor; gaseous material; substantially increase; electrical coils; corona inception; voltage capability; insulation therebetween; inception voltage; gaseous materials; metal conduct; electrical coil; /336/264/