Cable mounted capacitively-coupled circuit condition indicating

Details Cable mounted capacitively-coupled circuit condition indicating Cable mounted capacitively-coupled circuit condition indicating

1986-03-28

1988-12-27

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With coupling means

324133, 324522, 340664, G01R 120, G01R 3102, G08B 2100

Patent

active

047943297

ABSTRACT:
A device for indicating a circuit condition such as the occurrence of a fault current in a high voltage conductor from which the indicator device is suspended includes a housing having at the upper end thereof a pair of outwardly projecting cable engagement members. The engagement members are formed of a resilient insulating material and each include an outwardly projecting base portion and an inwardly projecting end portion which engages and holds the cable against the rear wall of the housing. Operating power for the indicator device is derived from the potential gradient of the electric field surrounding the conductor by means of a metallic plate positioned within the housing adjacent the conductor, and a metallic ring and electrically conductive coating within the lower end of the housing.

REFERENCES:
patent: 2190143 (1940-02-01), Barnes et al.
patent: 2779927 (1957-01-01), Rudge
patent: 3434052 (1969-03-01), Fechant
patent: 3725832 (1973-04-01), Schweitzer, Jr.
patent: 3969671 (1976-07-01), Smith
patent: 4375617 (1983-03-01), Schweitzer, Jr.
patent: 4424512 (1984-01-01), Schweitzer, Jr.
patent: 4438403 (1984-03-01), Schweitzer, Jr.
patent: 4456873 (1984-06-01), Schweitzer, Jr.

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