DEVICE FOR DC SWITCHING IN DC POLE OF DIRECT VOLTAGE NETWORK Russian patent published in 2019 - IPC H01H33/59 

FIELD: electrical engineering.

SUBSTANCE: invention is related to the field of electric engineering, in particular to switching-off of short-circuit currents that occur in complex DC voltage networks. DC voltage switch (10) with the first and the second node point for connection in series to one pole of the DC voltage network (1) and with the third node point for connection to the other pole of the DC voltage network (1) additionally contains: – located between first and second node point mechanical switch (11), – at least one pulse current module (41, 42) located between first and second node point parallel to mechanical switch (11), wherein pulse current module (41, 42) has three node points (201, 202, 203) of module, and first node point of module is connected to first node point, and second node point of module is connected to second node point, and third node point of module is connected to third node point; – comprises four semiconductor switches (21…24), which are connected in form of a bridge from two series circuits of two semiconductor switches each, wherein the potential points between semiconductor switches of both serial circuits correspond to the first and second node points of the module, and the outer ends of both serial circuits of the corresponding two semiconductor switches are connected in pairs to the fourth and fifth node points of the module; – comprises pulse current capacitor (25), which is connected in parallel to both series circuits of corresponding two semiconductor switches; – comprises switchable semiconductor element (27) between module fifth and third node points.

EFFECT: technical problem of the invention is creation of a device by means of which emergency currents in a DC voltage network are switched off reliably and economically.

8 cl, 5 dwg