MEASURING DEVICE OF LEAKAGE CURRENT IN LOAD OF SINGLE-PHASE RECTIFIER Russian patent published in 2018 - IPC G01R31/02 G01R19/165 H02H3/26 

FIELD: electricity.

SUBSTANCE: device analyzes the information content of the output signals of two external magnetic field strength sensors located on the current-carrying and current-deflecting wires connecting the load to a single-phase bridge rectifier. As an information parameter, the amplitudes of the spectral components of the sensor signals equal to 2ω (ω - frequency of the supplying rectifier of the input voltage), which, after amplification, are extracted using narrow-band filters. The fact that the difference signal of the amplitudes of the spectral components of the voltage sensors signals appears at the output of the comparison device will indicate the appearance of a leakage current in the load of the single-phase bridge rectifier.

EFFECT: automatic measurement of the leakage current in the load of the single-phase bridge rectifier by a non-contact method in real time without turning off the rectifier from the process of operation by comparing the corresponding voltages proportional to the actual and the set values of the leakage currents.

1 dwg