The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2021
Filed:
Jan. 25, 2021
Abb Schweiz Ag, Baden, CH;
Stefan Raaijmakers, Delft, NL;
ABB SCHWEIZ AG, Baden, CH;
Abstract
A DC metering device includes: two current transducers comprising hall sensors for measuring direct currents; two electrical switches; and a control device. Each one current transducer and one switch are connected in series by series connections. The series connections of the current transducers and switches are connected in parallel. The control device switches off in a repeating sequence alternately one of the switches and to continuously calculate a sum of continuously measured direct currents subtracted by measured zero offset currents of the two current transducers. The zero offset currents are measured when no current goes through the current transducers.