Electrical inductive apparatus
AssigneeWestinghouse Electric Corp.
InventorEdward J. Walsh
Life of this patent
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Abstract
Electrical inductive apparatus having a tank, an insulating and cooling liquid in the tank, and an electrical winding structure immersed in the liquid. The insulating liquid includes an inorganic constituent in its formulation. The insulating liquid also includes a toxic organic contaminant which continuously leaches into the insulating liquid from the electrical winding structure. An adsorbent material is in fluid flow communication with the insulating liquid to remove the contaminant on a continuous basis by contact adsorption, to maintain the degree of contamination of the insulating liquid below a predetermined level.
Claims10
An electrical transformer, comprising;
- a tank,
- a polymeric insulating liquid having an inorganic backbone disposed in said tank,
- a toxic, organic contaminant in said insulating liquid,
- an electrical winding disposed in said tank, said electrical winding being immersed in said insulating liquid,
- and an adsorbent material disposed in fluid flow communication with said insulating liquid, said adsorbent material being selected to adsorb the organic contaminant in said insulating liquid, with insignificant adsorption of the insulating liquid.
A retrofitted electrical transformer which was previously filled with a PCB insulating and cooling liquid, comprising:
- a tank,
- a silicone liquid disposed in said tank,
- an electrical winding having solid insulation impregnated with a PCB insulating liquid, said electrical winding being immersed in said silicone liquid,
- an adsorbent material for removing PCBs which leach into the silicone liquid,
- and conduit means in fluid flow communication with said tank for directing the flow of said silicone fluid from said tank, through said adsorbent material, and back to said tank.
Dependencies are inferred from the claim text.