US 11,874,337 B2
Reliable fault detection and fault localization in a load zone of a DC system
Markus Frühauf, Uttenreuth (DE); and Benno Weis, Hemhofen (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Appl. No. 17/604,705
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Mar. 24, 2020, PCT No. PCT/EP2020/058084
§ 371(c)(1), (2) Date Oct. 18, 2021,
PCT Pub. No. WO2020/221514, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 19171874 (EP), filed on Apr. 30, 2019.
Prior Publication US 2022/0206081 A1, Jun. 30, 2022
Int. Cl. G01R 31/40 (2020.01); G01R 1/36 (2006.01); G01R 19/14 (2006.01); H02H 7/26 (2006.01); H02J 1/00 (2006.01)
CPC G01R 31/40 (2013.01) [G01R 1/36 (2013.01); G01R 19/14 (2013.01); H02H 7/268 (2013.01); H02J 1/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A load zone, comprising:
a connection interface for supplying the load zone with electrical energy;
a DC bus:
an electronic switch arranged between the connection interface and the DC bus;
at least two electrical devices, each electrically connected in parallel to the DC bus;
a fuse arranged between the DC bus and a respective one of the at least two electrical devices;
a voltage sensor configured to measure a voltage across the fuse; and
an evaluation unit configured to identify a defective device of the at least two electrical devices based on a polarity of the voltage measured by the voltage sensor across the fuse.