US 12,142,907 B2
Overcurrent protection device for protecting a consumer arranged in a DC grid
Klaus Behringer, Igensdorf (DE); Wolfgang Feil, Schwandorf (DE); Peter Kaluza, Rieden (DE); Annemarie Lehmeier, Ursensollen (DE); Matthias Meier, Poppenricht (DE); Josef Burger, Schmidgaden (DE); and Thomas Bär, Fichtenhof (DE)
Assigned to SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Appl. No. 17/611,423
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed May 15, 2020, PCT No. PCT/EP2020/063571
§ 371(c)(1), (2) Date Nov. 15, 2021,
PCT Pub. No. WO2020/234136, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 19175083 (EP), filed on May 17, 2019.
Prior Publication US 2022/0231497 A1, Jul. 21, 2022
Int. Cl. H02H 3/087 (2006.01); H02H 1/00 (2006.01)
CPC H02H 3/087 (2013.01) [H02H 1/0007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An overcurrent protection device for protecting a consumer arranged in a DC grid, wherein the consumer is coupled via the overcurrent protection device to a supply rail, which is configured to connect to a supply potential of the DC grid, the overcurrent protection device comprising:
a measurement device configured to determine a detection value of a current flowing through the overcurrent protection device; and
a controller configured to
determining a trigger value based on the detection value and a single current-dependent trigger characteristic curve associated with the consumer,
compare the trigger value with a threshold value, and
trigger the overcurrent protection device upon the trigger value exceeding the threshold value, wherein the overcurrent protection device is not triggered when the trigger value does not exceed the threshold value,
wherein, upon the trigger value being determined based on the single current-dependent trigger characteristic curve, the detection value of the current flowing through the overcurrent protection device is taken into consideration together with a first factor or a second factor; and
wherein the first factor and the second factor are based on a direction of the flow of the current.