IMPROVEMENTS IN OR RELATING TO CIRCUIT INTERRUPTER APPARATUS WITH A STYLE SAVING OVERRIDE CIRCUIT

摘要

A circuit interrupter includes a circuit arrangement for sampling [Fig. 12 (79, 82)] 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 arangement for comparing [Fig. 16 (F200)] the operating characteristics to preselectable tripping parameters and for initiating a trip condition [Fig. 16 (F400)] when an operating characteristic exceeds a corresponding tripping parameter. Additionally, a circuit arrangement for initiating a hardware override trip condition using a minimum number of components [Fig. 10 (170, Q304, 92)] upon sensing an override signal, is also included; the override signal representing a limit selectable from a range of values.