Gas-insulated bushing

Details Gas-insulated bushing Gas-insulated bushing

1981-08-31

1984-01-03

Askin, Laramie E.

Electricity: conductors and insulators

With fluids or vacuum

With cooling or fluid feeding, circulating or distributing

174 31R, 174143, H01B 1736, H01B 1754, H01B 1728

Patent

active

044244029

ABSTRACT:
An improved gas-insulated bushing having a high withstand voltage and an increased capacity to cool a conductor, wherein the upper end portion of a potential-controlling capacitor in the form of a stopped tube is directly airtightly fitted to the outer surface of the central conductor, thereby enlarging a distance between the capacitor and the inner wall of the porcelain insulator and elevating the withstand voltage of the bushing; an internal pipe open at the bottom is inserted into the central conductor; the upper portion of the internal pipe communicates with a cooling case provided at the top of the porcelain insulator; a cooling gas is circulated through a route consisting of the cooling case, a space defined between the outer wall of the internal pipe and the inner wall of the central conductor and the interior of the internal pipe; and a cooling mechanism completely separated from an insulation gas chamber is provided in the central conductor, thereby enabling a cooling gas having a higher cooling capacity than an insulaton gas to be applied and elevate the cooling capacity.

REFERENCES:
patent: 1720586 (1929-07-01), Allan et al.
EPRI Journal, Oct. 1979, pp. 48 and 49.

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