Patent ID: 7417840
Filing Date: 2008-08-26
Classification: H02H

Abstract:
1. An electronic self-supplied protection device for automatic circuit-breakers, comprising: a supply device that draws energy from an electrical network protected by said circuit-breaker; a control device comprising at least two levels of operation, a first level of said at least two levels of operation being associated with the function of protection from instantaneous short-circuit (SCinst), a second and further levels of operation being associated with further functions of said protection device; and a selective interface device comprising a first supply regulator for regulating a power supply to said first level of operation, immediately following upon closing of a circuit by the circuit-breaker and, a second supply regulator for regulating the power supply to said second and further levels of operation of said control device, after a controlled period of time, wherein said selective interface device further comprises a regulation block, said regulation block generating a high voltage between the first supply regulator and ground when the circuit is open, said regulation block enabling a delivery of more power to the second supply regulator when the circuit is closed.