Method for determining location of phase-to earth fault

Details Method for determining location of phase-to earth fault Method for determining location of phase-to earth fault

2008-05-19

2011-10-25

Valone, Thomas (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S512000

Reexamination Certificate

active

08044666

ABSTRACT:
A method and apparatus for determining a location of a phase-to-earth fault on a three-phase electric line (30) of an electric network, comprising determining an equivalent load distance curve of the electric line (30) representing a voltage drop along the electric line scaled by an equivalent load distance of the electric line, determining a fault distance line indicating an estimate of a distance of the fault (F) from the measuring point (40) in relation to the equivalent load distance, determining a distance at which the equivalent load distance curve and the fault distance line intersect when superimposed, and selecting the determined distance as the distance between the measuring point (40) and the point of fault (F).

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