US 11,988,695 B2
Arrangement for determining a current flowing through a busbar
Michael Beck, Winkelhaid (DE); and Alexander Wengler, Melkendorf (DE)
Assigned to Siemens Energy Global GmbH & Co. KG, Munich (DE)
Appl. No. 17/628,321
Filed by Siemens Energy Global GmbH & Co. KG, Munich (DE)
PCT Filed Jul. 19, 2019, PCT No. PCT/EP2019/069515
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/013318, PCT Pub. Date Jan. 28, 2021.
Prior Publication US 2022/0317165 A1, Oct. 6, 2022
Int. Cl. G01R 19/25 (2006.01); G01R 1/20 (2006.01); G01R 15/14 (2006.01)
CPC G01R 19/2506 (2013.01) [G01R 1/203 (2013.01); G01R 15/144 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An arrangement for determining the magnitude of a current flowing through a busbar, the arrangement comprising:
a measurement conductor which is electrically connected to the busbar at a first contact point and which extends from the first contact point to a second contact point;
a third contact point arranged at the busbar and spaced apart from the first contact point;
a voltage measurement device configured for measuring a voltage between the second contact point and the third contact point;
a controlled current source configured for injecting a measurement current into said measurement conductor; and
an evaluation device configured to determine the magnitude of the current flowing through the busbar from a magnitude of a measurement current, from a cross sectional area of said measurement conductor that is effective for conducting the current, and from a cross sectional area of the busbar that is effective for conducting the current.