Switching device in a direct current circuit for transferring a current from one current path to another current path.

摘要

Device in a direct current circuit for transfer of a direct current (Id1) between a first current path (e.g. SG-X1-P41-SR1) and a second current path (GE-EL-PO-NS-Z1-Y1) and/or for limiting the voltage at a point (P51) in the circuit. The device comprises a first semiconductor connection (X1), which is connected only to the first current path and is controllable between conducting and non-conducting states and vice versa, a second semiconductor connection (Y1), which is connected only to the second current path and has a diode function, a branch point (P41) at which the two current paths are connected to each other, a capacitor (C11) connected between those ends of the semiconductor connections which are facing away from the branch point, and control members adapted to control the first semiconductor connection between conducting and non-conducting states and vice versa in dependence on the voltage (UC11) across the capacitor.