Patent ID: 11959966
Assignee: SCHNEIDER ELECTRIC INDUSTRIES SAS
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 9:
10. The method according to claim 8, wherein:
the values of the coil current are measured over the time interval by means of the sensors associated with the coil, while the electromagnetic actuator is kept in the stable position, and the switching apparatus is in a freewheeling mode, in which the coil voltage is passively limited by the control circuit, while the coil current decreases freely, with the electrical energy being mainly dissipated by the coil resistance;
a coil inductance value of the coil is computed by means of an electronic control device of the switching apparatus from the measured coil current value and using previously known coil voltage and coil resistance values;, and wherein the coil inductance is one of the other electrical quantities used to form the intermediate indicator.