Electrical current metering with a dual interferometric configuration and serrodyne signal processing

Theoretical and experimental results were presented which validated a new dual interferometric configuration with serrodyne processing for the remote sensing of electrical current. Linearity and waveform reproduction at 50 Hz were observed and a current resolution (/spl ap/22.4 A/sub rms/Hz/sup - 1/2 /) was obtained. The utilization of the proposed interferometric concept to simultaneously perform metering and relaying current measurements was also addressed.