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:
Aug. 20, 2002
Filed:
Nov. 19, 1999
Philip L. Atwater, Golden, CO (US);
James Dehaan, Denver, CO (US);
Malin L. Jacobs, Littleton, CO (US);
The United States of America as represented by the Secretary of the Interior, Washington, DC (US);
Abstract
An air-core current transducer measurement system is provided for measuring current flow in a high voltage transmission line. The system includes a high voltage end including an electrically conductive case for the circuitry at that end and an isolated low voltage end which is coupled by a fiber optic cable to the high voltage end and which provides a scaled output signal. A current transducer located at the high voltage end includes a coil for sensing current flow in the transmission line and for producing a time derivative output signal. An electrostatic shield connected to the electrically conductive case provides electrostatic shielding of the coil. A low pass filter, connected to the transducer and to the input of the electrically conductive case, filters out electrical noise while an integrating and scaling circuit, located in the case, receives the output of the low pass filter and converts the time derivative signal into a scaled signal corresponding to the scaled output signal provided at the low voltage end.