Patent ID: 7368834

Claim:
An electronic protection device for automatic circuit-breakers, said device comprising: a. a control unit; b. a warning interface; c. a supply system comprising a main supply system and a first back-up supply system; d. an interface for connection between said supply system and said control unit, said connection interface comprising an automatic device for passage from the main supply to the back-up supply in the event of interruption of said main supply; e. a restore device for restoring one or more pre-determined functions of said control unit, when said back-up supply is active, said restore device being manually operated by an operator; and f. a display, which is actuated when said pre-determined functions are restored, said display showing pre-determined information, said display being active for a pre-determined period of time only, wherein said electronic protection device comprises a warning system for warning said control unit that passage has occurred from said main supply to said back-up supply, and wherein said control unit, following upon a warning of passage from said main supply to said back-up supply, maintains just the fraction of internal clock active.