Patent ID: 9450397
Filing Date: 2016-09-20
CPC Classification: H01H,H02H

Claim Text:
1. A circuit breaking arrangement adapted to be coupled to a transmission line arranged to carry direct current for controllably effecting discontinuation of flow of direct current in the transmission line, the circuit breaking arrangement comprising: a current interrupter unit adapted to, when actuated, interrupt current in the transmission line; at least one resonance circuit connected in parallel with the current interrupter unit, the resonance circuit including at least one capacitor, at least one inductor and a switch element, wherein the resonance circuit is adapted to, upon actuation of the current interrupter unit, generate a resonance current superposing current of any arc generated in the current interrupter unit after actuation thereof, upon closing of the switch element by means of successive discharging and charging of the at least one capacitor; an auxiliary power supply unit coupled to the resonance circuit and adapted to selectively and controllably convey power to the at least one capacitor of the resonance circuit, thereby charging said at least one capacitor, wherein the resonance circuit is coupled to ground via the auxiliary power supply such that at least some of any power transmitted in the transmission line can at least momentarily charge the at least one capacitor of the resonance circuit; a sensing unit adapted to determine voltage of the transmission line and/or voltage of the at least one capacitor; a control unit coupled to the sensing unit and to the auxiliary power supply unit, wherein the control unit is adapted to cause the auxiliary power supply unit to convey power to the at least one capacitor of the resonance circuit in case the transmission line voltage is insufficient to sufficiently charge the at least one capacitor; and a circuit path coupled to the resonance circuit such that the auxiliary power supply unit, at least a part of the resonance circuit, and the circuit path at least partially define a charging circuit path, the charging circuit path being arranged so as to permit charging of the at least one capacitor in the resonance circuit by means of power supplied by the auxiliary power supply unit.