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SYSTEM AND METHOD OF DETECTION OF LAND FAULTS OR AGAINST THE CHASSIS IN CONTINUOUS CURRENT SYSTEMS WITH INVERTERS POWERED FROM BATTERIES (Machine-translation by Google Translate, not legally binding)
SYSTEM AND METHOD OF DETECTION OF LAND FAULTS OR AGAINST THE CHASSIS IN CONTINUOUS CURRENT SYSTEMS WITH INVERTERS POWERED FROM BATTERIES (Machine-translation by Google Translate, not legally binding)
System and method for detecting faults to ground or against the chassis in DC systems with inverters powered by batteries. A ground fault detection system is disclosed in DC systems with inverters powered by batteries. The system comprises: an average voltage point (9) of the battery (1); an impedance (6) between the point of medium tension (9) and earth or chassis (7); a measuring device (8) of the current/voltage in the impedance, obtaining a measured signal (22); an analyzer device (10) of the signal. The analyzer device comprises: means of harmonic decomposition (11) of the signal; means for obtaining the amplitude and polarity of the direct current signal (12) and the amplitude of said signal in alternating current (13); comparison means in continuous (14) and in alternate (16) in charge of comparing said amplitude in current with a predetermined value of continuous AFAULT cc (15) and of alterna AFAULT CA (17), and obtain output signals (19 to 21) indicative of the existence or absence of ground fault. (Machine-translation by Google Translate, not legally binding)
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