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 th...Show MoreMetadata
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.
Published in: IEEE Journal of Quantum Electronics ( Volume: 2, Issue: 8, August 1966)
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1.
G. H. Moulton, "Light pulse system shrinks high-voltage protection device", Electronics, vol. 38, pp. 71-75, May 1965.
2.
M. Born and E. Wolf, "7" in Principles of Optics, New York:Pergamon, pp. 256, 1964.
3.
Permitivity of the glass rod is assumed to be inversely proportional to its specific volume, of which temperature dependence is given by (1 — 3 αδT). And, f)L is proportional to the length and square-root of the permitivity of the glass rod.
4.
M. Born and W. Wolf, op. cit.2, ch. 13, p. 611.
