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:
Feb. 28, 2006
Filed:
Jan. 31, 2002
Jacob DE Vries, Allenwinden, CH;
Adrian Ulrich, Engelberg, CH;
Jacob De Vries, Allenwinden, CH;
Adrian Ulrich, Engelberg, CH;
Landis & Gyr AG, Zug, CH;
Abstract
A measuring circuit arrangement () for an electricity meter for direct connection is respectively connected, to an input () for voltage measurement and an input () for current measurement of a measuring chip () for each phase of a three phase supply. Upstream of the input () for voltage measurement is a voltage divider (RR) provided in order to match the voltage level, and upstream of the input () for current measurement is a voltage transformer () with measuring shunt (R) installed according to the invention. The voltage transformer () is so arranged that its ohmic resistance towards the measuring shunt (R) on the one hand sufficiently limits standard direct-current impingement of the voltage transformer () and on the other hand this ohmic resistance is also small enough so that, together with the inductance of the current transformer (), it displays no more than standard angle error.