US 12,228,593 B2
Control method of an electrotechnical device
Marcel Chevalier, Grenoble (FR); and Didier Van Dooren, Tullins (FR)
Assigned to Schneider Electric Industries SAS, Rueil-Malmaison (FR)
Filed by Schneider Electric Industries SAS, Rueil Malmaison (FR)
Filed on Mar. 10, 2022, as Appl. No. 17/691,585.
Claims priority of application No. 2103011 (FR), filed on Mar. 25, 2021.
Prior Publication US 2022/0308097 A1, Sep. 29, 2022
Int. Cl. G01R 19/00 (2006.01); G01K 13/00 (2021.01); G01R 31/56 (2020.01); G01R 31/66 (2020.01)
CPC G01R 19/003 (2013.01) [G01K 13/00 (2013.01); G01R 31/56 (2020.01); G01R 31/66 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A method for monitoring an electrotechnical device, the electrotechnical device comprising three phases respectively connected to three phases of an electrical network, the method comprising:
measuring, for each phase, a plurality of temperature values within a determined time interval,
measuring, for each phase, a plurality of current values within the determined time interval,
determining, for each phase, a plurality of specific parameters, each specific parameter being determined based on a temperature value and on a current value of the corresponding phase, measured at corresponding times of the determined time interval,
comparing specific parameters of the phases over the determined time interval, the specific parameters including all or some of the plurality of specific parameters of the phases, wherein comparing the specific parameters includes comparing evolution of the specific parameters of one of the phases of the three phases with evolution of the specific parameters of at least one of the other phases of the three phases over the time interval, and
determining an alert on the basis of the comparison.