Signal transfer method and equipment for electric machine equipp

Details Signal transfer method and equipment for electric machine equipp Signal transfer method and equipment for electric machine equipp

1988-01-20

1989-08-29

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

340310R, 307 38, H04Q 100

Patent

active

048621579

ABSTRACT:
For transferring signals relative to an electric machine provided with a three-phase power supply cable with three phase conductors, there is applied a signal to be transmitted to a first point in the three-phase cable between anyone of the phase conductors of such cable and both of the other phase conductors taken conjointly, and a reception signal is picked up in another point in said cable between anyone of the phase conductors of such cable and both of the other phase conductors taken conjointly.
Preferably, similar capacitors are associated with each of the phase conductors in the cable at each end thereof, a galvanic separation transformer being disposed between such conductors, and the transmitter and the receiver, respectively, and an inductance being disposed between such transformers and conductors.

REFERENCES:
patent: 2307771 (1943-01-01), Denton et al.
patent: 3337992 (1967-08-01), Tolson
patent: 3696383 (1972-10-01), Oishi et al.
patent: 4065763 (1977-12-01), Whyte et al.
patent: 4287596 (1981-09-01), Chari
IEEE Transactions on Power Apparatus and Systems, vol. PAS-91, No. 2, Mars/Avril 1972, pp. 587-591, IEEE, New York, US; D. L. Hedrick et al., "765-kV Power Line Carrier Communications; III-Equipment Development and Design"; p. 587, FIG. 1.

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