US 12,066,465 B2
Current sensing using panel plane
Chad R. Mittelstadt, Cedar Rapids, IA (US)
Assigned to Schneider Electric USA, Inc., Boston, MA (US)
Appl. No. 17/297,634
Filed by Schneider Electric USA, Inc., Andover, MA (US)
PCT Filed Dec. 26, 2019, PCT No. PCT/US2019/068550
§ 371(c)(1), (2) Date Jun. 10, 2021,
PCT Pub. No. WO2020/139927, PCT Pub. Date Jul. 2, 2020.
Claims priority of provisional application 62/785,930, filed on Dec. 28, 2018.
Prior Publication US 2022/0034944 A1, Feb. 3, 2022
Int. Cl. G01R 15/20 (2006.01); H02B 1/30 (2006.01)
CPC G01R 15/207 (2013.01) [H02B 1/303 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An apparatus for sensing current on a conductor in an electrical panel, comprising:
at least one sensing system comprising:
a ferromagnetic body having two legs, which when placed on a load-side of the electrical panel is configured to form, together with at least a plane of the electrical panel, a magnetic path around the conductor, the ferromagnetic body comprising at least two parts with a first air gap therebetween along the magnetic path, wherein the plane of the electrical panel comprises ferromagnetic part of a wall of a housing for the electrical panel or part of a ferromagnetic plate installed below the conductor on the electrical panel, and
a sensor, arranged in the first air gap, to measure a current or other electrical property representative of current on the conductor based on the magnetic field across the first air gap.