Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1988-10-21
1990-04-10
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
324117R, 324244, 250225, 25022721, 250551, G01R 3100, G01R 3300, G01J 132
Patent
active
049163876
ABSTRACT:
A system for monitoring an alternating current including: a current transducer (10) having first and second optical ports (12,14) and a component for causing optical radiation to travel between the optical ports (12,14) while interacting with the alternating current in a manner to cause the intensity of the optical radiation to vary as a function of variations in the amplitude of the current, with the polarity of the variation being dependent on the direction of travel of optical radiaiton in the transducer (10) between the optical ports (12,14); two optical cables (16,18) each optically coupled to a respective optical port; couplers (20,22) connected to the optical cables (16,18) for causing optical radiation to travel in both directions in the transducer (10) between the optical ports (12,14); and a circuit arrangement (24,26,28,30,38,40,52) for deriving a respective representation of the change in intensity experienced by the optical radiation traveling in each direction through the cables (16,18) and the transducer (10), and for combining the representations relating to both directions in order to derive an indication of the change in intensity experienced by the optical radiation when traveling through the transducer (10).
REFERENCES:
patent: 4540937 (1985-03-01), Asars
patent: 4683421 (1987-07-01), Miller et al.
patent: 4704741 (1987-11-01), Shikada
patent: 4748686 (1988-05-01), Glomb
patent: 4829821 (1989-05-01), Carome
Asea Brown Boveri Inc.
Eisenzopf Reinhard J.
Nguyen Vinh P.
Studebaker B. R.
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