Patent ID: 7184250

Claim:
A protection device having line and load terminals, the device comprising: a latching mechanism, adapted to move between a closed state which establishes electrical contact between said line and load terminals, and an open state which prevents electrical contact between said line and load terminals; an initial reset prevention mechanism, adapted to prevent said latching mechanism from being set in said closed state until power is applied to said line terminals; and a reset pin; wherein: said latching mechanism comprises a latching plate; said initial reset prevention mechanism prevents said latching plate from engaging said reset pin to said latching mechanism to said closed state when power is not applied to said line terminals; and said initial reset prevention mechanism comprises: a solenoid, adapted to drive a plunger; a contact arrangement; and a locking plate, adapted to contact said contact arrangement to enable said contact arrangement to apply power to said solenoid when said power is applied to said line terminals, to energize said solenoid to drive said plunger from a first position to a second position to move said latching plate to a position at which said reset pin is engagable with said latching plate to said latching mechanism to said closed state.