Method and apparatus for locating a parallel arc fault

摘要

Methods to determine the location of an arc fault (26) include a first method utilizing the inherent resistance per unit length (24) of the wire (14). A second and a third method utilize an inherent inductance per unit length (38) of the wire (14). The second method derives the inherent inductance (38) from the output voltage and a rate of current rise (36). The third method derives the inherent inductance (50) from a resonant frequency of an oscillating current (44). The information is useful to locate a fault (26) emanating from a wire member (14) of a wiring harness (10) used to distribute power about an aircraft.