Apparatus for continually upgrading transformer dielectric liquid
AssigneeWestinghouse Electric Corp.
InventorsEdward J. Walsh, Robert A. Kurz
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 liquid having a low vapor pressure and containing contaminants derived from various sources within the tank. Filter means associated with the liquid including a liquid recirculating device for degassing, demoisturizing, and filtering insoluble particles out of the liquid, whereby the liquid is decontaminated and upgraded in a continual process.
Claims9
An apparatus for continually upgrading transformer dielectric fluid by degassing, demoisturizing, and filtering the fluid, comprising:
- a tank,
- a dielectric fluid having a low vapor pressure disposed in the tank and containing contaminants including moisture, gases, and insoluble particulates,
- an electrical winding immersed within the fluid in the tank,
- filter means for decontaminating the fluid including a fluid recirculating device for degassing, demoisturizing, and filtering the fluid,
- the fluid recirculating device for degassing including a permeation cell having a membrane material and within a supportive container,
- the fluid recirculating device for demoisturizing including granular pellets of a desiccant material for reducing moisture in the fluid to 20 ppm or less at room temperature,
- whereby decontaminated fluid is returned into the tank.
Dependencies are inferred from the claim text.