Radio-interrogated, surface-wave technology current transformer

Details Radio-interrogated, surface-wave technology current transformer Radio-interrogated, surface-wave technology current transformer

1997-10-20

1999-10-12

Snow, Walter E.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324117R, 324252, 324226, G01R 1520, G01R 3300, G01R 3100, G01R 3302

Patent

active

059660082

ABSTRACT:
A radio-interrogated, surface-wave technology current transformer for high/medium-voltage systems includes a magnetosensitive element connected to a surface-wave structure of a surface-wave configuration as a termination of the surface-wave structure. A response signal of the surface-wave configuration is information regarding current strength/direction and phase of the current instantaneously flowing through the system, which is evaluated by a ground station. By virtue of the radio transmission, there is no electrical insulation problem, and the use of a radio-interrogated surface-wave configuration makes that part of the overall current transducer which is at high potential into a passive element of the same.

REFERENCES:
patent: 3273146 (1966-09-01), Hurwitz et al.
patent: 4420752 (1983-12-01), Davis et al.
patent: 4620191 (1986-10-01), Skeie
patent: 4725841 (1988-02-01), Nysen et al.
"Surface-Acoustic-Wave Pressure and Temperature Sensors" (Reeder et al.), Proceedings of the IEEE, vol. 64, No. 5, May 1976 pp. 754-756;.
"Surface-Acoustic-Wave Device Incorporating Conducting Langmuir-Blodgett Films", Electronic Letters, vol. 23, No. 9, Apr. 23, 1987;.

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