US 5,466,891 A · Conical composite SF.sub.6 high voltage bushing with floating shield

Abstract

The present invention provides a floating shield for a high voltage bushing. Preferably the bushing is conically shaped and has a composite housing for substantially optimizing the electrical performance of the bushing according to the invention. The floating shield is preferably suspended within the bushing housing by a supporting insulator placed in a low electrical stress region of the bushing. In a preferred embodiment, the supporting insulator is disposed between a ground grading shield and the bushing housing. The composite housing preferably provides a protective inner tube made of a fiber reinforced material and an outer silicone rubber housing having weather sheds formed in a helix on the surface of the housing.

Claims18

Dependent claims

A high voltage bushing having a hollow elongated insulative housing such that a high voltage conductor can be longitudinally disposed within said housing, the bushing comprising:

a ground shield disposed within said housing for substantially shielding a base section of said housing;
a floating shield disposed within said housing for substantially shielding a middle section of said housing;
a support means at least partly disposed between said ground shield and said housing for supporting said floating shield;
and
means for connecting said floating shield to said support means at a location within said housing in which the electrical stress is substantially lower than the electrical stress in unshielded areas of the base and middle sections of the bushing.

2 more elements

Dependencies are inferred from the claim text.

Conical composite SF.sub.6 high voltage bushing with floating shield

Life of this patent

Conical composite SF.sub.6 high voltage bushing with floating shield

Life of this patent

Abstract

Claims18