Electrical bushing
AssigneeABB Power Grids Switzerland AG
InventorsSergey PANCHESHNYI, Sandra HAEBERLI, Marcel EUGSTER
Life of this patent
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Abstract
Electrical bushing for medium and high voltage comprising a dielectric bushing main body a conductor extending through the bushing main body and being electrically insulated by the bushing main body, at least a conductive foil concentrically arranged around the conductor along at least a part of its length, and a barrier layer at least partially covering an edge region of said conductive foil, wherein the barrier layer has a dielectric strength greater than the dielectric strength of the dielectric bushing main body and greater than 150 kV/mm.
Claims16
An electrical bushing for medium and high voltage, the electrical bushing comprising:
- a dielectric bushing main body;
- a conductor extending through the dielectric bushing main body and being electrically insulated by the dielectric bushing main body;
- at least a conductive foil concentrically arranged around the conductor along at least a part of a length of the conductor;
- and
- a barrier layer at least partially covering an edge region of said conductive foil,
- wherein the barrier layer has a dielectric strength greater than the dielectric strength of the dielectric bushing main body and greater than 150 kV/mm and wherein the barrier layer comprises a polyimide material, including Kapton, Apical, or Upilex, the value of the dielectric strength greater than 150 kV/mm being maintained over a range of temperature up to 200° C.
Dependencies are inferred from the claim text.