Phase-shift detector

Details Phase-shift detector Phase-shift detector

G - Physics

01

R

323/21, 324/33

G01R 25/04 (2006.01) G01R 25/00 (2006.01)

Patent

CA 1149870

ABSTRACT OF THE DISCLOSURE For the purpose of detecting phase changes (sin .delta.) in an alternating-voltage mains, an apparatus is provided in which in each mains- phase a weakly attenuated oscillating circuit follows the mains-phase position after a considerable delay. Further, a multiplier is provided in each mains phase, to which are passed the output voltage from the relevant oscillating circuit and a voltage perpendicular to this voltage in the steady state. The phase-changes (sin .delta.) arising are taken off by passing the output voltages from the multipliers to an adding amplifier.

356420

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