Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1990-04-25
1992-06-23
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
324 725, 324117R, G01R 1900
Patent
active
051246341
ABSTRACT:
An optical current transducer for measuring current in a high voltage transmission line includes a temperature compensated light source of nominal predetermined intensity and wavelength, a Faraday rotation device where Faraday rotation impressed on the light exiting the light source is proportional to the intensity of the electrical current to be measured. A hermetic tank encloses the Faraday rotation device to provide protection from the environment. An electronic circuit converts the optical output of the Faraday rotation device to an electrical signal in direct proportion to and in phase with the current to be measured.
REFERENCES:
patent: 3324393 (1967-06-01), Casey et al.
patent: 3360323 (1967-12-01), Weisman et al.
patent: 3597683 (1971-08-01), Saito
patent: 3605013 (1971-09-01), Yoshikawa et al.
patent: 3609381 (1971-09-01), Hartfield
patent: 3621390 (1971-11-01), Von Willisen
patent: 3629703 (1971-12-01), Bernard
patent: 3679974 (1972-07-01), Mollenbeck
patent: 3693082 (1972-09-01), Jaecklin
patent: 3705395 (1972-12-01), Aagard et al.
patent: 3707321 (1972-12-01), Jaecklin et al.
patent: 3707329 (1972-12-01), Jaecklin et al.
patent: 3708747 (1973-01-01), Leseur
patent: 3711264 (1973-01-01), Robinson et al.
patent: 3743929 (1973-07-01), Lesueur
patent: 3746983 (1973-07-01), Renz
patent: 3753101 (1973-08-01), Aumont
patent: 3754143 (1973-08-01), Lesueur
patent: 3769584 (1973-10-01), Iten et al.
patent: 3778619 (1973-12-01), Carnel
patent: 3781092 (1973-12-01), Sussman et al.
patent: 3906343 (1975-09-01), Feldtkeller
patent: 3936742 (1976-02-01), Krause
patent: 3944329 (1976-03-01), Lee, Jr. et al.
patent: 3947089 (1976-03-01), Rapp
patent: 3980949 (1976-09-01), Feldtkeller
patent: 4002975 (1977-01-01), Erickson et al.
patent: 4035083 (1977-07-01), Woodriff et al.
patent: 4070620 (1978-01-01), Feldtkeller et al.
patent: 4070622 (1978-01-01), Harms et al.
patent: 4117399 (1978-09-01), Ono et al.
patent: 4232264 (1980-11-01), Papp et al.
patent: 4243936 (1981-01-01), Papp et al.
patent: 4253061 (1981-02-01), Ono et al.
patent: 4255018 (1981-03-01), Ulrich et al.
patent: 4272158 (1981-06-01), Johnston, Jr. et al.
patent: 4272159 (1981-06-01), Matsumoto
patent: 4298245 (1981-11-01), Aulich et al.
patent: 4363061 (1982-12-01), Vaerewyck et al.
patent: 4370612 (1983-01-01), Puech et al.
patent: 4392722 (1983-07-01), Shirasaki
patent: 4428017 (1984-01-01), Vaerewyck et al.
patent: 4531092 (1985-07-01), Shibano
patent: 4539519 (1985-09-01), Ulrich et al.
patent: 4539521 (1985-09-01), Matsumoto
patent: 4540937 (1985-09-01), Asars
patent: 4554419 (1985-11-01), Taniuchi et al.
patent: 4560932 (1985-12-01), Mitsui et al.
patent: 4563639 (1986-01-01), Langeac
patent: 4563646 (1986-01-01), De'sormie're
patent: 4564754 (1986-01-01), Sato et al.
patent: 4578639 (1986-03-01), Miller
patent: 4581579 (1986-04-01), Nagatsuma et al.
patent: 4584470 (1986-04-01), Iizuka et al.
patent: 4604577 (1986-08-01), Matsumura et al.
patent: 4608535 (1986-08-01), Tada et al.
patent: 4612500 (1986-09-01), Chen et al.
patent: 4613811 (1986-09-01), Vaerewyck et al.
patent: 4615582 (1986-10-01), Lefevre et al.
patent: 4630218 (1986-12-01), Hurley
patent: 4683421 (1987-07-01), Miller et al.
patent: 4694243 (1987-09-01), Miller et al.
patent: 4698497 (1987-10-01), Miller et al.
patent: 4745357 (1988-05-01), Miller
patent: 4755665 (1988-07-01), Ulmer, Jr. et al.
patent: 4822150 (1989-04-01), Duarte
patent: 4956607 (1990-09-01), Abe et al.
"Fine Annealing of Optical Glass for Low Residual Stress and Refractive Index Homogeneity" by H. E. Hagy, Applied Optics May 1968, vol. 7, No. 5.
"An Absolute Electric Current Probe Based on the Faraday Effect" by Caton et al., Journal of Research May-Jun. 1984, vol. 89.
"The Design of Passive Current Sensors Using Magneto-Optics" by D. C. Erickson, Div. of Substation & Control Eng., Bonneville Power Admin., Dec. 1983.
"Measurement of Faraday Rotation in Twisted Optical Fiber Using Rotating Polarization and Analog Phase Detection" by G. I. Chandler et al., SPIE vol. 566, Fiber Optic and Laser Sensors III (1985), pp. 206-211.
"Optical-Fiber Copolymer-Film Electric-Field Sensor", by M. D. Mermelstein, Applied Optics vol. 22, No. 7/1 Apr. 1983.
"Characteristic Directions in Optics of Twisted Birefringent Media" by H. K. Aben, Journal of the Optical Society of America, A/vol. 3, No. 9, Sep. 1986, pp. 1414-1421.
"Optical Methods for Measurement of Voltage and Current on Power Systems", by A. J. Rogers, Optics and Laser Technology, Dec. 1977.
"Faraday Effect Sensors: The State of the Art," by G. W. Day and A. H. Rose, National Bureau of Standards, 1988.
"High Accuracy Faraday Rotation Measurements," by Ulmer, Paper No. ThCC 21, pp. 288-291, 1988 Technical Digest of Optical Fiber Sensors, New Orleans, La., Jan. 1988.
"Principles of Optics", Pergamon Press, Sixth Edition, 1985, pp. 665-667, 703-708, by Born et al.
"Current Measurements by Faraday Rotation in Single-Mode Optical Fiber", by G. Chandler & F. Jahoda, Rev. Sci. Instrum. 56(5), May 1985, pp. 852-854.
"Magneto-Optic Rotation in Birefringement Media--Application of the Poincare Sphere", By G. Ramachandran & S. Ramaseshan, Journal of the Optical Society of America, vol. 42, No. 1, Jan. 1952, pp. 49-56.
"Calibrated Faraday Current and Magnetic Field Sensor", by B. Neyer, J. Chang, L. Ruggles, SPIE vol. 566, Fiber Optic and Laser Sensors 111 (1985) pp. 201-205.
Meyer Thomas J.
Ulmer, Jr. Edward A.
Burns William J.
Femal Michael J.
Gilroy Hugh M.
Square D Company
Wieder Kenneth A.
LandOfFree
Ring optical current transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ring optical current transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ring optical current transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-935494