Circuit interrupter apparatus with a battery backup and reset circuit.

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 arrangement 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 fault indicating circuit arrangement [Fig. 3 (88)] energized by a backup energy source [Fig. 3 (89)] following interruption is also included as well as a circuit arrangement for preventing interference [Fig. 8 (Q204)] to the display and operating circuits during power-up and power-down conditions.