High level arc fault detector

Details High level arc fault detector High level arc fault detector

2006-04-04

2006-04-04

Toatley, Jr., Gregory J. (Department: 2877)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

C324S521000, C324S536000, C361S020000, C361S050000

Reexamination Certificate

active

07023196

ABSTRACT:
Apparatus and methods for detecting high level arc faults in aircraft power systems are disclosed. One embodiment of the invention with reduced susceptibility to nuisance trips includes three low pass filters each having an output connected to a threshold detector. In addition, a three input comparator is connected to an output of each of the threshold detectors and a fault verification circuit is connected to an output of the three input comparator. An embodiment of the method of the invention for detecting arc faults in three phase aircraft power systems involves detecting at least one of the three phases having a current exceeding a predetermined threshold, detecting differences between the three phases and generating a signal indicative of difference being detected between the three phases for a time period exceeding a predetermined duration.

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