Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1979-10-09
1981-05-26
Rosenberger, R. A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 96, 350393, 356368, G01R 3100
Patent
active
042694833
ABSTRACT:
A device for electro-optically measuring a voltage in a high-voltage conductor, which voltage will produce an electrical field that will elliptically polarize both a linearly polarized light beam or a circularly polarized light beam, the device having a transmitter providing a source of light as a light beam, polarizer for the light beam, a head section at the high-voltage conductor and a receiver on a base which is spaced from the head section, said receiver having a device for measuring the voltage due to a phase difference between the components of the light beams passing with different transit speeds, characterized by the transmitter being on the base, a supply line extending from the source to the head and at least one return line for conducting the light beam having a desired polarization, which is either linear or circular, between the head section and the base, at least one of the lines being formed by a crystal fiber with a longitudinal, linear electro-optical effect and consisting of a piezoelectric material which becomes birefringent in an electrical field. The supply and return lines may be of the same or different electro-optical material with the different materials selected to compensate for temperature induce birefringence. Also only one line need to be of the electro-optical material.
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Harms et al., "Automatic Recording of Faraday Rotation and Circular Dichroism", Rev. Sci. Instrum., vol. 44, No. 6, Jun. 1973, pp. 742-743.
Jaecklin, Henry A., "Measuring Currents at Extra High Voltages", Laser Focus, May 1970, pp. 35-38.
Rogers, A. J., "Optical Methods for Measurement of Voltage and Current at High Voltage", AIM Leige Traitement des Donnees, 1977, pp. 1-12.
Rosenberger R. A.
Siemens Aktiengesellschaft
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