| 摘要 |
<p>PURPOSE:To miniaturize an apparatus, and to measure voltage and currents precisely by equally dividing the inside of a tank by grounding grids and forming a voltage detector by mounting floating electrodes around conductors at each phase and a current detector by fitting Faraday elements around them. CONSTITUTION:Main circuit conductors u, v, w at three phase are arranged at the apices of an equilateral triangle in a tank vessel 11 filled with an insulating gas, and grounding grids 12a-12c are mounted at the contents of the main circuit conductors, and fitted to the tank vessel through fittings 12'. Cylindrical floating electrodes Fu, Fv, Fw are each mounted on the outer circumferences of the main circuit conductors u, v, w and connected to transformers Tu, Tv, Tw containing auxiliary capacitors on the outside of the tank vessel 11, thus constituting a voltage detector. Likewise, Faraday elements 17 for detecting currents are disposed, and optical fiber cables 18 are connected at projecting-and-emitting- beam terminals for said elements 17. The cables 18 are connected to beam- emitting-and-receiving sections 21 for optical CTs on the outside of the tank vessel 11 through sealing sections 20.</p> |
