Electronic protection devices for automatic circuit-breakers

1. 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.

2. An electronic protection device according to claim 1 , wherein said control unit, following upon a warning of passage from said main supply to said back-up supply, disables one or more pre-determined functions.

3. An electronic protection device according to claim 1 , wherein said back-up supply system comprises a first device having characteristics of short charging time and a second device having characteristics of long duration charging time.

4. An electronic protection device according to claim 1 , wherein said back-up supply system is charged by said main supply system.

5. An electronic protection device according to claim 4 , further comprising means for detecting the available energy coming from the main supply system and means for partializing the step of charging of said back-up system as a function of the energy available.

6. An electronic protection device according to claim 1 , said electronic protection device further comprising a feedback control system that connects said back-up supply system with said control unit.

7. An electronic protection device according to claim 6 , wherein said control unit manages the step of charging of said back-up supply system.

8. An electronic protection device according to claim 6 , wherein said back-up supply unit sends, to said control unit, information on the energy available in said back-up supply unit.

9. An electronic protection device according to claim 1 , further comprising a device for disabling said control unit.

10. An electronic protection device according to claim 1 , wherein parts of said control unit are supplied only in conditions of “full power” when said main supply system is active.

11. An electronic protection device according to claim 1 , wherein said first back-up supply system supplies a real-time clock, it being possible for the control unit to be supplied by said first back-up supply system through manual activation.

12. An automatic circuit-breaker, in particular a low-voltage one, comprising a device according to claim 1 .