Apparatus for current measurement

US7336064B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Klaus Ludwig · Erlangen, DE
• Gotthard Rieger · Munich, DE

Key dates

• Filing date: Mar 22, 2005
• Grant date: Feb 26, 2008
• Expiry date: Mar 22, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R15/205
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The apparatus for measurement of a current which is flowing in an axially elongated electrical conductor at a first electrical potential. The apparatus contains at least one associated sensor element associated with the conductor that is electrically isolated from it at a second electrical potential different from the first electrical potential of the electrical conductor, and having magnetoresistive characteristics. The sensor element is intended to form a loop which is magnetically closed around the conductor in the circumferential direction, with the resistance value being tapped off at axially opposite ends. Its magnetoresistive part is preferably composed of a non-metallic powder composite material with a high magnetoresistive effect.