US 12,217,919 B2
Electrical network having fault protection control
Yi Zhu, Kuemmersbruck (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 17/599,076
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Sep. 13, 2019, PCT No. PCT/EP2019/074545
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2020/200496, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. PCT/CN2019/080553 (WO), filed on Mar. 29, 2019; application No. PCT/CN2019/080554 (WO), filed on Mar. 29, 2019; and application No. PCT/CN2019/080558 (WO), filed on Mar. 29, 2019.
Prior Publication US 2022/0200275 A1, Jun. 23, 2022
Int. Cl. H01H 33/59 (2006.01); H01H 9/54 (2006.01); H02H 1/00 (2006.01); H02H 3/087 (2006.01); H02H 7/125 (2006.01); H02H 7/22 (2006.01); H02H 7/26 (2006.01); H02H 9/00 (2006.01); H02J 1/10 (2006.01); H02J 1/12 (2006.01)
CPC H01H 33/596 (2013.01) [H01H 9/542 (2013.01); H02H 1/0007 (2013.01); H02H 3/087 (2013.01); H02H 7/1252 (2013.01); H02H 7/1257 (2013.01); H02H 7/222 (2013.01); H02H 7/268 (2013.01); H02H 9/001 (2013.01); H02J 1/10 (2013.01); H02J 1/12 (2013.01); H01H 2009/544 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An electrical network having feed-in devices, loads and a distribution network, which is arranged therebetween and has at least one busbar and at least one apparatus for opening or closing a DC circuit, wherein the at least one apparatus comprises:
an electrical switch to open or close the DC circuit;
a fault current detection device;
a tripping unit;
a pre-charging apparatus; and
a control unit to automatically close the electrical switch after pre-charging, wherein
in response to detection of a fault current by the fault current detection device, the electrical switch is configured to open the DC circuit via the tripping unit, and the pre-charging apparatus is configured to restore a voltage on the at least one busbar before the electrical switch is closed,
each of a plurality of the loads is configured to be electrically disconnected individually via an electromechanical switch, and
the plurality of the loads are configured to be electrically disconnected as a group via the at least one apparatus, wherein the at least one apparatus further comprises another control unit to suppress a switch-on transient.