| 摘要 |
<p>PURPOSE:To simplify the assembly of an optical system along with higher detection sensitivity of a zero phase component while enabling detection of individual phase components. CONSTITUTION:This apparatus is provided with three optical fiber sensors 50 to detect currents and voltages in phases of a three-phase alternating current three light sources 8 to supply light to the optical fiber sensors 50 and a light star coupler 14 to synthesizing light signals from the optical fiber sensors 50 optically. In addition a photodetecting element 10 is provided to receive a light signal of a zero phase component from the light star coupler 14 a condenser lens 31 to extract a polarization component of the light signal from an analyzer 6 of the optical fiber sensors 50 and a photodetecting element 32 which receives the polarization component extracted while detecting individual phase components.</p> |
