Patent ID: 8836339
Filing Date: 2014-09-16
Classification: H01H,H02H

Abstract:
1. A circuit arrangement comprising: a first grid-voltage-independent fault current circuit breaker, a second grid-voltage-independent fault current circuit breaker, each of the first and second fault current circuit breaker comprising disconnect contacts, a sum current converter, and a trigger current circuit at least indirectly operatively connected with the disconnect contacts for disconnecting the disconnect contacts, with the trigger current circuit comprising a first switching arrangement for extending a trigger time of the trigger current circuit by a predetermined time, and at least one first control input for controlling the first switching arrangement, a switching device, a coupling unit electrically connecting the first fault current circuit breaker and the second fault current circuit breaker with one another in parallel with the switching device, wherein the switching device comprises at least one first electrical switching device input, at least one first electrical switching device output, and at least one second electrical switching device output, at least one first control output for affecting a trigger characteristic of at least one of the first and second fault current circuit breaker connected to the switching device, wherein in a first operating state of the switching device the first switching device input is electrically connected with the first switching device output, and wherein in a second operating state of the switching device the first switching device input is electrically connected with the second switching device output, wherein the switching device is constructed for uninterrupted transition from the first operating state to the second operating state or from the second operating state to the first operating state.