Title :
8C1 - The laser current transformer for EHV power transmission lines
Author :
Saito, S. ; Fujii, Y. ; Yokoyama, K. ; Hamasaki, J. ; Ohno, Y.
Author_Institution :
Institute of Industrial Sci., Univ. of Tokyo, Tokyo, Japan
fDate :
8/1/1966 12:00:00 AM
Abstract :
A current measuring device applicable to an extra-high voltage power transmission line higher than 500 kV is proposed with preliminary experimental results. It obtains the instantaneous magnetic field ajacent to a transmission wire by measuring the angle of Faraday rotation of a laser beam in a flint glass rod. The laser beam is transmitted and analyzed at a ground potential site, and in the energized part this device has neither insulated conductors nor active elements. An experimental laser current transformer yielded a sensitivity of 66 mV per 100 A and good linearity. Various sources of error and modifications are discussed.
Keywords :
Current measurement; Current transformers; Laser beams; Magnetic field measurement; Power lasers; Power measurement; Power transmission lines; Rotation measurement; Transmission line measurements; Wire;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.1966.1074032
