Method for detecting a disturbance along a conductor in an elect

Details Method for detecting a disturbance along a conductor in an elect Method for detecting a disturbance along a conductor in an elect

1983-01-12

1986-07-08

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

361 82, H02H 340, G01R 3108

Patent

active

045995567

ABSTRACT:
In an electrical power distribution system, line disturbances produce voltage and current travelling waves, or step-change signals, that are phase-shifted 90.degree. relative to each other. A simulation signal is derived from the current step-change signal and is in phase with the voltage step-change signal. The two in-phase signals are combined and compared with established limit values to determine when a fault occurs.

REFERENCES:
patent: 4063163 (1977-12-01), Vitins
patent: 4063164 (1977-12-01), Lanz
patent: 4063166 (1977-12-01), Glavitsch
patent: 4287547 (1981-09-01), Vitins
Muller, Leonhard: "The Selective Protection of Electrical Installations"--Brown Boveri Journal--1971.

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