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US 4,052,685 AGranted
Current transformer
AssigneeWestinghouse Canada Limited
InventorTadeusz W. Kolator
Life of this patent
Estimating the term…
Abstract
A post type oil filled current transformer having a U-shaped primary winding formed of a tubular conductor. An oil flow controlling hollow tubular member is disposed within the primary conductor. The tubular oil flow controlling member is vertically oriented and spaced from the internal wall of the tubular primary winding to define inner and outer coaxial paths permitting a downward flow of cool oil in the inner path within the tubular member and an upward flow of heated oil in the outer path between the tubular member and the inner wall of the primary winding.
Claims4
A current transformer, comprising:
- an enclosure;
- an insulating fluid disposed in said enclosure;
- a winding disposed in said enclosure, said winding including a substantially vertical oriented U-shaped tubular conductor having upwardly extending legs with open ends;
- means for increasing the circulation of said insulating fluid, including a fluid conductor disposed within said U-shaped tubular conductor to define first and second substantially coaxial flow paths for said insulating fluid, with the first path being within said fluid conductor, and the second path being between said fluid conductor and said tubular conductor;
- said first and second flow paths being interconnected at a point within said winding;
- said fluid conductor including first and second downwardly extending legs joined in common adjacent one of said open ends of said U-shaped conductor, said first leg disposed within one of said upwardly extending legs of said U-shaped conductor, said second leg extending downwardly into the cooler insulating fluid removed from said open end of said U-shaped conductor.
3 more elements
Dependencies are inferred from the claim text.