Patent ID: 11952997
Assignee: nan
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC F

Claim 12:
13. The operating apparatus (104) according to claim 12, wherein said voltage meter (16b) is provided with a filtering unit (116) configured to perform, on each line-to-line voltage, Vab, Vac and Vbc, a voltage reduction, by means of a voltage divider, a first low-pass filtering operation, preferably by means of a resistive-capacitive filter, and, subsequently, a second low-pass filtering operation, by means of an operational amplifier low-pass filter, so as to isolate and amplify the DC component of the measured voltages, to obtain the x and y components of the resulting voltage signal V2, in DC Vab-meas, Vac-meas and Vbc-meas.