| 摘要 |
The present disclosure relates to a switching system (1) for breaking a current, comprising: a contact arrangement (3) having a first terminal (3a) and a second terminal (3b), a resonance circuit (5) connectable across the contact arrangement (3), a first switch (S1) connected to the resonance circuit (5) and to the first terminal (3a), wherein the first switch (S1) is switchable between an open state and a closed state, wherein in the closed state the first switch (S1) is arranged to enable current to flow through the resonance circuit (5) in a first flow direction and into the contact arrangement (3) in a direction opposite to a contact arrangement arc current flow direction, a second switch (S2) connected to the resonance circuit (5) and to the second terminal (3b) of the contact arrangement (3), wherein the second switch (S2) is switchable between an open state and a closed state, wherein in the closed state the second switch is arranged to enable current to flow through the resonance circuit (5) in a second flow direction opposite to the first flow direction, and a control system (7), wherein the control system (7) is arranged to alternatingly first set the first switch (S1), and then the second switch (S2), first in the closed state and then in the open state upon a current breaking operation, until a current pulse, emanating from energy supplied by a contact arrangement arc current, flowing through the resonance circuit (5) and into the contact arrangement (3) reaches an amplitude which is equal to or greater than a magnitude of a contact arrangement arc current. This disclosure also relates to a method of performing a current breaking operation. |
