Power supply device

Abstract

Power supply device (10) for cars (14) of a train consist (18), comprising a two-phase power distribution bus line (22) and a redundant two-phase power distribution bus line (26), wherein the car (14) has at least one car power supply system (30) to which the two-phase power distribution bus line (22) and the redundant two-phase power distribution bus line (26) are connected, wherein the car power supply system (30) has measuring means (34) with which a current consumption (IB) can be determined, and wherein means (38) are provided with which a contact fault (42) can be detected in each phase (P1, P2) of the power distribution bus line (22) and the redundant power distribution bus line (26), characterized in that two current sensors (38) are provided as means (38) for detecting contact faults (42), which are located in different phases (P1,P2) of the power distribution bus line (22) and / or redundant power distribution bus line (26), via which a current (IP1, IP2) in the corresponding phase (P1, P2) of the power distribution bus line (22) and / or redundant power distribution bus line (26) can be measured.