Patent ID: 11881706
Assignee: SIEMENS ENERGY GLOBAL GMBH & CO. KG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A switching apparatus for disconnecting a current path of a DC voltage network, which current path comprises source-side and/or load-side inductances, comprising:
at least two switching modules connected in series, wherein each of the switching modules comprises at least one controllable semiconductor switching element with which a series circuit comprising a resistor and a capacitor is connected in parallel,
wherein the switching apparatus is configured in such a manner that, during disconnection of the current path, in order to reduce energy stored in the inductances, the semiconductor switching element of at least one of the switching modules is turned on with a duty factor,
wherein the duty factor is formed using a difference between an actual voltage across the semiconductor switching element and a setpoint voltage across the semiconductor switching element, and
wherein the setpoint voltage is formed at least from the system voltage of the DC voltage network and the number of switching modules.