Patent ID: 8395868

Claim:
A device for limiting short-circuit current in a consumer network having at least one supply line with a respective current feed point and operated with alternating current and low voltage, wherein electric energy having a medium voltage level is supplied to the customer network via current feed aggregates, the device comprising: a disconnection point disposed in the at least one supply line so as to provide a first partial line and a second partial line in an event of a short-circuit fault, each of the first and second partial lines having a respective associated current detector and at least one of the first and second partial lines having at least one current feed aggregate; a multiphase high-speed short circuiter disposed in the disconnection point and having a current carrying capacity for short-circuit current intensities in the at least one supply line; and a respective power circuit breaker connected in series with the high-speed short circuiter toward each of the first and second partial lines, a switch-off time of the respective power circuit breaker being shorter than a switch-off time of an associated incoming switch, wherein the respective associated current detector is configured, upon detection of a short circuit in one of the first and second partial lines, to transmit a triggering signal to the high-speed short circuiter so as to effect a short-circuit switching operation in the disconnection point.