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US 7,742,676 B2Granted
High-voltage bushing
AssigneeABB Research Ltd.
InventorsVincent Tilliette, Jens Rocks, Gerd Chalikia, Roger Hedlund
Life of this patent
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Abstract
An exemplary high-voltage bushing has a conductor and a core surrounding the conductor, wherein the core includes a sheet-like spacer, which spacer is impregnated with an electrically insulating matrix material. The spacer can have a multitude of holes that are fillable with the matrix material. The spacer can be net-shaped or meshed. It can be a net of fibers. The bushing can be a fine-graded bushing with equalizing plates within the core. As a matrix material, a particle-filled resin can be used.
Claims20
A bushing comprising:
- a conductor;
- and
- a core surrounding the conductor, the core comprising a spacer in sheet form, said spacer is impregnated with an electrically insulating matrix material, and is wound, in spiral form, so that the spacer includes plural neighboring layers, wherein the spacer is net-shaped or meshed and comprises plural interwoven fibers and has plural holes that are filled with the matrix material.
Dependencies are inferred from the claim text.