METHOD FOR DIAGNOSING THE CAUSE OF ACTIVATION OF AN ELECTRICAL PROTECTION DEVICE, AUXILIARY DEVICE AND ELECTRICAL SYSTEM FOR IMPLEMENTING SUCH A METHOD

摘要

This method of diagnosing the cause of triggering of an electrical protection device comprises, after detection by the auxiliary device of a loss of electrical supply, the determination of a type of electrical fault from recorded values. , the determination comprising: - the comparison, with a first threshold value, of the largest value of the maximum current intensity among the values recorded for several measurement intervals preceding the loss of the supply, a short circuit being diagnosed if the largest value of the maximum current is greater than a first threshold value; - the comparison, with a second threshold value, of the largest value of rms value of the current among the recorded values, an overload being diagnosed if the largest RMS value is greater than a second threshold value.