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.
Type:
Grant
Filed:
November 19, 1999
Date of Patent:
August 20, 2002
Assignee:
The United States of America as represented by the Secretary
of the Interior
Inventors:
Philip L. Atwater, James Dehaan, Malin L. Jacobs