Patent · US Active

Electrical current sensor with grounded magnetic core

US9400292B2 · kind B2 · utility

0Cited by

6References

14Claims

0Family size

Assignee

LEM INTELLECTUAL PROPERTY SA · CH

Inventors

Gerard Lepine · Ambilly, FR
Vinh Tho Vo · Meyrin, CH
Arnaud Labbe · Girod, FR

Key dates

Filing date	Jul 12, 2012
Grant date	Jul 26, 2016
Priority date	—
Expiry date	Nov 5, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01R15/207
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An electrical current transducer comprising a housing, at least one magnetic core comprising an air gap and defining a central passage configured to receive a primary conductor carrying a primary current to be measured through the central passage, a magnetic field detector positioned at least partially in the air gap, and a grounding element. A lateral surface of the magnetic core is positioned against the grounding element without direct fixed attachment between the magnetic core and the grounding element, and the grounding element overlaps the magnetic core to an extent configured to ensure that a capacitive coupling (C3) between the magnetic core and the grounding element is greater than a capacitive coupling (C2) between the magnetic core and the magnetic field detector.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.