Radio-interrogated, surface-wave technology current transformer for high-voltage systems

US5966008A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Reinhard Maier · Herzogenaurach, DE
• Wolf-Eckhart Bulst · Munich, DE
• Thomas Ostertag · Ulm, DE
• Oliver Sczesny · Aschheim, DE
• Wolfgang Schelter · Uttenreuth, DE
• Leonhard Reindl · Kirchzarten, DE
• Werner Ruile · Birkenfeld, DE
• Gerd Scholl · Hersbruck, DE
• Jurgen Michel · Cambridge, US

Key dates

• Filing date: Oct 20, 1997
• Grant date: Oct 12, 1999
• Expiry date: Oct 20, 2017

Classification

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

Abstract

A radio-interrogated, surface-wave technology current transformer for high/medium-voltage systems includes a magnetosensitive element connected to a surface-wave structure of a surface-wave configuration as a termination of the surface-wave structure. A response signal of the surface-wave configuration is information regarding current strength/direction and phase of the current instantaneously flowing through the system, which is evaluated by a ground station. By virtue of the radio transmission, there is no electrical insulation problem, and the use of a radio-interrogated surface-wave configuration makes that part of the overall current transducer which is at high potential into a passive element of the same.