Fault detector for detecting faults in a dc capacitor circuit

Details Fault detector for detecting faults in a dc capacitor circuit Fault detector for detecting faults in a dc capacitor circuit

G - Physics

01

R

324/58

G01R 31/02 (2006.01) G01R 31/01 (2006.01) G01R 31/42 (2006.01) H02H 7/16 (2006.01)

Patent

CA 1268213

ABSTRACT OF THE DISCLOSURE A fault detector for detecting faults in a DC capacitor circuit connected to the DC buses of an inventor circuit using semiconductor device for converting direct current into alternating current to suppress the voltage pulsation and comprising a plurality of parallel-connected capacitor circuits each having a plurality of series- connected DC capacitors. The fault detector comprises a comparison means connected to the junctions of the series- connected DC capacitors to compare the respective potentials of the parallel-connected capacitor circuits, and detects the short-circuit and time-aging of the DC capacitors of the parallel-connected capacitor circuits rapidly on the basis of the output signal of the comparison menas.

535099

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