| 摘要 |
A circuit interrupter includes a circuit arrangement [Fig. 12 (79, 82)] for sampling a conditioned current value and determining operating characteristics [Fig. 3 (100)] related to the current flow through an electrical circuit [Fig. 3 (71)]. Also included is a circuit arrantement for comparing [Fig. 16 (F200)] the operating characteristics to preselectable tripping parameters and circuit arrangement for initiating a trip condition [Fig. 16 (F400)] when an operating characteristic exceeds a corresponding tripping parameter. Additionally, a fault indicating [Fig. 5 (140-143)] and selecting [Fig. 5 (144-150, 156)] arrangement which utilizes a trip curve graph [Fig. 5 (42, 45, 47, 48)] to assist in the operation of the circuit interrupter, is also included. |
