Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1976-05-28
1977-12-13
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 3108
Patent
active
040631630
ABSTRACT:
An apparatus for the localization of a fault on a line wherein there is formed from at least one measurement signal derived from a line voltage and at least one measurement current derived from a line current an evaluation signal characterizing the direction and/or distance of a fault location with respect to a reference location on the line determinable by at least one regulation or adjustment magnitude, the apparatus comprising a voltage- and current measuring device provided at the measurement location and a signal processing- and evaluation circuit. The signal processing- and evaluation circuit possesses at least one reference location-adjustment input and there is provided means defining an operative connection, which changes the momentarily effective reference location adjustment, between an output of the evaluation circuit and the reference location-adjustment input.
REFERENCES:
patent: 3255406 (1966-06-01), Schluter
patent: 3408564 (1968-10-01), Hoel
patent: 3590368 (1971-06-01), Esclangon
patent: 3612989 (1971-10-01), Souillard
patent: 3710240 (1973-01-01), Kuehnemann et al.
patent: 3800215 (1974-03-01), Souillard
patent: 3878460 (1975-04-01), Nimmersjo
BBC Brown Boveri & Company Limited
Kleeman Werner W.
Strecker Gerard R.
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