Patent ID: 7068481

Claim:
A protective device including a plurality of line terminals configured to be connected to an electrical distribution system and a plurality of load terminals configured to be connected to at least one load, comprising: a fault detection circuit coupled to the plurality of line terminals and the plurality of load terminals, the fault detection circuit being configured to detect at least one fault condition; a power interruption circuit coupled to the fault detection circuit, the power interruption circuit including a set of movable contacts configured to decouple the plurality of line terminals from the plurality of load terminals in response to the fault detection circuit detecting the at least one fault condition; a reset mechanism coupled to the power interruption circuit and configured to actuate the movable contacts to re-couple the plurality of line terminals to the plurality of load terminals; a lock-out mechanism coupled to the reset mechanism, the lockout mechanism being configured to disable the reset mechanism in a lock-out state; and a test circuit coupled to the fault detection circuit and the lock-out mechanism, the test circuit being configured to provide a simulated fault signal to the fault detection circuit in response to a user stimulus, the test circuit being configured to drive the lock-out mechanism from an unlocked state to the lock-out state if the fault detection circuit and/or power interruption circuit fails to respond to the simulated fault signal within a predetermined period of time.