PASSIVE RESONANCE DC CIRCUIT BREAKER

摘要

A DC circuit breaker (10) is provided, comprising a pair of arcing contact members (20a, 20b) for holding an arc (22); an interaction element (40), adapted for interacting with the arc (22) in dependence of whether the arc (22) is in a first state (22a) or in a second state (22b) such that due to the interaction element (40) the arc voltage drop in the first state (22a) is lower than the arc voltage drop in the second state (22b); a resonance branch (30) coupled in parallel to the contact members (20a, 20b) thereby forming a resonance circuit adapted for letting a resonance branch current Ir oscillate thereby inducing oscillations of an arc current Ia, wherein the resonance branch (30) comprises a coupling element (32) for coupling the resonance branch (30) with the arc (22), such that the arc (22) is brought to the first state (22a) when the current Ir in the resonance branch (30) has a first direction, and that the arc (22) is brought to the second state (22b) when the current Ir in the resonance branch (30) has a second direction.