Patent ID: 9118174
Filing Date: 2015-08-25
Classification: G01R,H01H,H02H

Abstract:
1. A circuit interrupting device comprising: one or more line terminals for connecting to an external power supply; one or more load terminals for connecting to an external load; an interrupting device connected to said line terminals and said load terminals and electrically connecting said line terminals to said load terminals when said circuit interrupting device is in a reset condition and disconnecting said line terminals from said load terminals when said circuit interrupting device is in a tripped condition; a fault detection circuit that detects a fault condition in said circuit interrupting device and generates a fault detection signal when said fault condition is detected, wherein said fault detection signal is provided to said interrupting device to place said circuit interrupting device in said tripped condition; an auto-monitoring circuit electrically coupled to said fault detection circuit and said interrupting device and continuously monitoring one or more signals to determine an operating state of said circuit interrupting device, wherein at least one of said monitored signals includes a first auto-monitoring input signal the value of which is at least partially determined by a value of a power indication signal generated by said fault detection circuit.