High voltage bushing with field control material
AssigneeABB Research Ltd.
InventorsLise Donzel, Felix Greuter, Hansjoerg Gramespacher
Life of this patent
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Abstract
The invention pertains to a dielectric bushing (1′), in particular a high-voltage bushing (1′) for an electrical high-voltage apparatus. To realize the field control in the field-stressed zone (7; 7a, 7b), at least one screening electrode (6; 6a, 6b) arranged in the interior (20) of the insulator part (2; 2a, 2b; 2c) is eliminated and replaced with a non-linear electric and/or dielectric field control element (9; 9a, 9b; 9i, 9o; 9s) on the insulator part (2; 2a, 2b; 2c) in the region of the first installation flange (4; 8).
Claims21
A dielectric bushing, particularly a high-voltage bushing for an electrical high-voltage apparatus, comprising an insulator part with a first installation flange and a second installation flange for installing the bushing,
- wherein the insulator part contains in its interior a chamber for a solid insulating material, for an insulating liquid or for an insulating gas;
- wherein a screening electrode required for the desired voltage level is omitted within the bushing in a field stress zone in the region of the first installation flange;
- and
- wherein a non-linear electric and/or dielectric field control element is instead provided in the field stress zone on the insulator part within the region of the first installation flange for field control purposes.
Dependencies are inferred from the claim text.