Loop fault isolator

Details Loop fault isolator Loop fault isolator

1983-11-21

1985-09-10

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Series connected sections with faulty section disconnect

361 65, 361 79, 324 52, 34082516, 455 8, H02H 726

Patent

active

045410313

ABSTRACT:
The invention comprises a method and a device for locating, isolating and by-passing a defective electrical device in an electrical circuit, and comprising sensing current and voltage at a first point in such circuit, on one side of such device, whereby the current and voltage are not significantly altered by the sensing process, sensing current and voltage at a second point in such circuit, on the other side of such device, whereby the current and voltage are not significantly altered by the sensing process, comparing such currents and voltages as between such two points, creating a control signal responsive to such compared currents and voltages, and, isolating such device from such circuit, and thereafter re-establishing such circuit whereby to by-pass such device, in response to a control signal of predetermined characteristics.

REFERENCES:
patent: 2786988 (1957-03-01), Bergman
patent: 3040309 (1962-06-01), Miller
patent: 3309688 (1967-03-01), Yanishevsky
patent: 3444321 (1969-05-01), Pantos
patent: 3467889 (1969-09-01), Brough-Cunningham et al.
patent: 3714452 (1973-01-01), Williamson
patent: 3796920 (1974-03-01), Hedrick et al.
patent: 3909677 (1975-09-01), McClain
patent: 4047155 (1977-09-01), Miller
patent: 4390835 (1983-06-01), Elkateb et al.

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