US 12,394,972 B2
Method and system for determining a tripping range of an electrical circuit switching device
Matthieu Favre, Voiron (FR); Bartosz Boguslawski, Grenoble (FR); and Costin Vasile, Grenoble (FR)
Assigned to Schneider Electric Industries SAS, Rueil Malmaison (FR)
Filed by Schneider Electric Industries SAS, Rueil Malmaison (FR)
Filed on Sep. 20, 2023, as Appl. No. 18/370,426.
Claims priority of application No. 2209681 (FR), filed on Sep. 23, 2022.
Prior Publication US 2024/0372353 A1, Nov. 7, 2024
Int. Cl. H02H 3/00 (2006.01); H02H 1/00 (2006.01); H02H 3/08 (2006.01)
CPC H02H 3/08 (2013.01) [H02H 1/0092 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for determining a tripping range of an electrical circuit switching device designed to supply power to an electrical installation comprising at least one load, the switching device having an open position, in which the flow of an electric current in said electrical circuit is cut off, and a closed position, in which an electric current flows in said electrical circuit, changeover from the closed position to the open position being triggered either following a control or following a detection of a cut-off current flowing in said switching device, the cut-off current having a level that exceeds a nominal current threshold,
the method being implemented by an electronic calculation module which is configured to receive data from at least one vibration sensor integrated into said switching device, the method comprising, in an operational phase:
obtaining at least one temporal vibration signal, over a chosen acquisition period, based on data from said at least one vibration sensor, at a given sampling frequency, following the changeover to said open position,
for each of the temporal vibration signals, transforming the temporal vibration signal into a spectrogram which is represented in a time-frequency representation space,
selecting a predetermined subset of characteristics of the spectrogram, referred to as a subset of operational characteristics,
applying a prediction model parameterized by supervised machine learning, the values of said subset of operational characteristics being provided at the input of said parameterized prediction model so as to obtain a class corresponding to an estimated value of cut-off current,
determining, as a function of the estimated value of cut-off current and said nominal current threshold, a tripping range of the switching device amongst: normal tripping by control, overload tripping following an electrical overconsumption by at least one load of the electrical installation, and tripping following a short circuit.