Test terminal for use in an electric power transmission system
AssigneeInterpace Corporation
InventorJohn H. Moran
Life of this patent
Estimating the term…
Abstract
A test terminal for a lightning arrestor in an electric power transmission system is formed of a unitary generally cylindrical ceramic element having metallic end caps secured thereto. A bar-shaped electrical bypass conductor is removably secured to the end caps. An electrically conductive glaze is applied to the external surface of the ceramic element along a band between the end caps, and spaced apart therefrom. The electrically conductive glaze serves as a guard electrode for attachment thereto of a clamp of a test lead. The cross-sectional area of the conductor is less than approximately 5% of the mean cross-sectional area of the ceramic element.
Claims4
A test terminal for use in an electric power transmission system, said terminal comprising:
- a unitary ceramic element including a central portion having a generally cylindrical external surface and end portions extending axially from said central portion and having undulating external surfaces;
- an exposed electrically conductive glaze localized on said cylindrical surface and providing a guard electrode of sufficient width that a clamp of a test lead can be attached thereto;
- an exposed electrically insulative glaze localized on said undulating surfaces;
- a pair of end fittings of electrically conducting material secured to opposite ends of said element;
- and
- an elongated electrical conductor connected to one of said end fittings and detachably connected to the other of said end fittings.
Dependencies are inferred from the claim text.