Corona protection device of semiconductive rubber for polymer insulators
AssigneeHubbell Incorporated
InventorsTiebin Zhao, Jeffrey Kester, John A. Krause
Life of this patent
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Abstract
A high voltage insulator has a fiberglass reinforced core surrounded by a polymer weathershed housing with a plurality of fins. Metal fittings are located at both ends of the insulator and are connected to the weathershed housing by shielding collars. A corona protection device of semiconductive elastomeric material is attached or bonded to the exterior of the shielding collar or the metal fitting. The interface between the corona protection device and the shielding collar or metal fitting may include a sealant or other compound.
Claims19
An electrical insulator, comprising:
- a core;
- a metal fitting located at an end of said electrical insulator;
- an external weathershed housing surrounding said core;
- a shielding collar coupling said weathershed housing to said metal fitting;
- and
- a resilient corona protection member formed from a semiconductive elastomeric material coupled to a radially outwardly facing exterior surface of said shielding collar.
A high voltage insulator, comprising;
- a fiberglass reinforced core;
- a metal fitting located at one end of said high voltage insulator;
- an external polymer weathershed housing adjacent to and surrounding said core;
- a plurality of polymer fins extending from said weathershed housing;
- a shielding collar coupling said weathershed housing to said metal fitting;
- and
- a semiconductive elastomeric corona protection mechanism molded to a radially facing exterior surface of said high voltage insulator.
A polymer insulator comprising:
- a fiberglass reinforced cylindrical insulator core extending coaxially along a longitudinal axis;
- an external polymer weathershed housing adjacent to and surrounding said core;
- a plurality of disc shaped polymer fins extending from said weathershed housing and arranged equidistant from one another;
- a first metal fitting attached to a proximal end of said core, said first metal fitting having inner and outer ends;
- a second metal fitting attached to a distal end of said core, said second metal fitting having inner and outer ends, said inner ends of said first and second metal fittings abutting opposing ends of said weathershed housing;
- a first cylindrical metal shielding collar sealably coupling said weathershed housing to said first metal fitting;
- a second cylindrical metal shielding collar sealably coupling said weathershed housing to said second metal fitting;
- a first cylindrical semiconductive elastomeric corona protection member bonded to, sealed to, and surrounding at least a portion of said first shielding collar;
- and
- a second cylindrical semiconductive elastomeric corona protection member bonded to, sealed to, and surrounding at least a portion of said second shielding collar.
Dependencies are inferred from the claim text.