US 12,327,701 B2
Pyrotechnic circuit breaker assembly for an aircraft, and an aircraft comprising such an assembly
David Rousset, Toulouse (FR); and Jean-Marc Lacoste, Toulouse (FR)
Assigned to AIRBUS OPERATIONS SAS, Toulouse (FR)
Filed by Airbus Operations SAS, Toulouse (FR)
Filed on Jun. 28, 2022, as Appl. No. 17/851,391.
Claims priority of application No. 2107084 (FR), filed on Jun. 30, 2021.
Prior Publication US 2023/0005684 A1, Jan. 5, 2023
Int. Cl. H01H 39/00 (2006.01); B64D 27/24 (2006.01); B64D 47/00 (2006.01); H02H 1/00 (2006.01); H02H 3/08 (2006.01)
CPC H01H 39/006 (2013.01) [B64D 27/24 (2013.01); B64D 47/00 (2013.01); H02H 1/0007 (2013.01); H02H 3/08 (2013.01)] 7 Claims
OG exemplary drawing
 
7. A method for protecting an electrical circuit of an aircraft, the electrical circuit comprising:
a conductive element of a circuit,
a severing device configured be activated by a first pyrotechnic element and that is configured to sever said conductive element in a predetermined cut-off zone delimited by a downstream point, and
a contactor element configured to be activated by a second pyrotechnic element, the contactor element being configured to connect said downstream point of the cut-off zone to a ground conductor of said electrical circuit,
wherein first and second activation signals of the first and second pyrotechnic elements, respectively, are distinct and controlled independently of one another,
said method comprising steps of:
(i) detecting a current that is representative of a current greater than a predetermined threshold established in said conductive element,
(ii) connecting said downstream point of the cut-off zone to a ground conductor of said electrical circuit, and
(iii) severing said conductive element in a predetermined cut-off zone,
wherein step (iii) of severing said conductive element occurs after step (ii) of connecting said downstream point of the cut-off zone to said ground conductor of said electrical circuit.