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

Claim 8:
9. The method according to claim 8, wherein:
a closing phase of the switching apparatus comprises a dynamic phase, during which the coil voltage is controlled by the electronic control device, followed by a transition phase, during which the switching apparatus is in a freewheeling mode;
during the dynamic phase the trend of the coil current increases a first time beyond a first threshold, which is linked to a drop-out current of the switching apparatus, beyond which the movable core starts to move from its open position to its closed position, then the trend of the coil current decreases below the first threshold, reaches a minimum value, and then rises a second time above the first threshold;
a second threshold of the coil current is defined, with the second threshold being between the first threshold and the minimum value;
while the measured coil current is less than the second threshold, and provided that the trend of the coil current exceeds the first threshold a second time, an integral of the difference between the coil current and the second threshold is computed over a time interval defined between a first instant, when the trend of the coil current decreases below the second threshold, and a second instant, when the coil current again rises above the second threshold,, and wherein said integral is one of the other electrical quantities combined to form the intermediate indicator.