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US 2010/0147556 A1Published application
Electric insulation arrangement
AssigneeABB Research Ltd.
InventorsErik Jonsson, Lars Palmqvist
Life of this patent
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Abstract
An electric insulation arrangement including a field grading material including a matrix including a dielectric material. A plurality of micro varistor particles is distributed in the matrix. A plurality of bridge particles include an electrically conducting material and form electrically conducting bridges between individual micro varistor particles. The bridge particles form a percolating network together with the micro particles but do not form a percolating network by interconnection between themselves.
Claims31
An electric insulation arrangement, comprising:
- an electric insulator and a field grading body, said field grading body comprising field grading material comprising
- a matrix comprising a dielectric material,
- a plurality of micro varistor particles distributed in said matrix, and a plurality of bridge particles comprising an electrically conducting material and forming electrically conducting bridges between individual micro varistor particles, wherein said bridge particles form a percolating network together with said micro varistor particles but do not form a percolating network by interconnection between themselves.
Dependencies are inferred from the claim text.