US 12,244,132 B2
Circuit breaker device and method
Fabian Döbler, Theilenhofen (DE); Christopher Fromme, Fürth (DE); Dominic Malane, Eichstätt (DE); and Marvin Tannhäuser, Hausen (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 18/258,597
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Dec. 16, 2021, PCT No. PCT/EP2021/086123
§ 371(c)(1), (2) Date Jun. 21, 2023,
PCT Pub. No. WO2022/136091, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 10 2020 216 396.0 (DE), filed on Dec. 21, 2020.
Prior Publication US 2024/0047957 A1, Feb. 8, 2024
Int. Cl. H02M 3/00 (2006.01); H02H 3/05 (2006.01); H02H 3/38 (2006.01)
CPC H02H 3/05 (2013.01) [H02H 3/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit breaker device for protecting an electrical low-voltage circuit, the circuit breaker device comprising:
a housing having connections for conductors of the electrical the low-voltage circuit;
an electronic interruption unit having semiconductor-based switch elements and as a result of said semiconductor-based switching elements, said electronic interruption unit has a high-impedance state for said semiconductor-based switching elements for a purpose of interruption and a low-impedance state for said semiconductor-based switching elements for a purpose of current flow in the electrical low-voltage circuit;
a controller connected to said electronic interruption unit;
a voltage sensor connected to said controller for ascertaining voltage values; and
the circuit breaker device being configured such that the voltage values and an expected value for a voltage are used to ascertain a difference voltage, with a result that difference voltage values are available cyclically, each of the difference voltage values is compared with a first threshold value, and, if at least two successive ones of the difference voltage values exceed the first threshold value, said electronic interruption unit initiates the interruption of the electrical low-voltage circuit to protect the electrical low-voltage circuit from short circuits.