METHOD AND DEVICE FOR THE DETECTION OF FAULT CURRENT ARCING IN ELECTRIC CIRCUITS

摘要

The invention is directed to a method and a device for detecting fault curre nt arcing in electric circuits for consumers with relatively constant power consumptio n, particularly in onboard aircraft power supplies. The object of the invention is to find a novel possibility for detecting arc faults in electric lines of consumers with a relatively consta nt power consumption which appreciably reduces erroneous triggering of safeguards without compromising the reliability of switching off in the event that arcing actually occurs. This object is met, according to the invention, in that a voltage value is measur ed simultaneous with the current measurement, a ratio is formed of the current measurement values and voltage measurement values that are detected in parallel, and an indicator signal is generated for detected arcing when changes in the ratio of current measurement values and voltage measurement values exceed a predetermined threshold value.