EP 4374404 A1 20240529 - CIRCUIT BREAKER AND METHOD
Title (en)
CIRCUIT BREAKER AND METHOD
Title (de)
SCHUTZSCHALTGERÄT UND VERFAHREN
Title (fr)
DISJONCTEUR ET PROCÉDÉ
Publication
Application
Priority
- DE 102021210828 A 20210928
- EP 2022075728 W 20220916
Abstract (en)
[origin: WO2023052146A1] The invention relates to a circuit breaker for protecting an electric low-voltage circuit, having: - the function of ascertaining the level of a differential current of the low-voltage circuit, - a mechanical separating contact unit so that an opening function of contacts can be switched in order to prevent a current flow or a closing function of the contacts can be switched for a current flow in the low-voltage circuit, and - an electronic interruption unit which is connected to the mechanical separating contact unit in series on the circuit side and which, as a result of semiconductor-based switch elements, can be switched to a high-ohmic state of the switch elements in order to prevent a current flow or a low-ohmic state of the switch elements for a current flow in the low-voltage circuit, wherein - the ascertained level of the differential current is compared with a differential current threshold and if the current threshold is exceeded, a process for preventing the current flow in the low-voltage circuit is initiated, and - while the contacts of the circuit breaker are closed and the electronic interruption unit is in the low-ohmic state, the electronic interruption unit is switched to the high-ohmic state when a voltage-reduced state of the low-voltage circuit is initiated, and the electronic interruption unit is switched back to the low-ohmic state after the voltage-reduced state is discontinued.
IPC 8 full level
H01H 9/54 (2006.01); H01H 83/12 (2006.01); H01H 83/22 (2006.01); H02H 3/08 (2006.01); H02H 3/24 (2006.01)
CPC (source: EP)
H01H 9/547 (2013.01); H01H 9/548 (2013.01); H01H 83/12 (2013.01); H01H 83/14 (2013.01); H01H 83/22 (2013.01); H02H 3/05 (2013.01); H02H 3/24 (2013.01); H02H 3/33 (2013.01); H01H 83/10 (2013.01); H01H 2071/044 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102021210828 A1 20230330; CN 118043925 A 20240514; EP 4374404 A1 20240529; WO 2023052146 A1 20230406
DOCDB simple family (application)
DE 102021210828 A 20210928; CN 202280065359 A 20220916; EP 2022075728 W 20220916; EP 22790268 A 20220916