New optical fiber voltage transformer

This paper deals with the design, testing results and practical application of a new type of optical voltage transformer (OVT). It is different from the exist OVTs. The high voltage is directly applied on the electrooptical crystal sensor, without the divider. And a new type of the silicon rubber insulator, SF6 gas filled, is employed for high voltage insulation. It is precision is +/- 0.1 percent from 80 percent to 120 percent of the rating voltage, between -10 degrees C and +40 degrees C. All parts of the OVT are developed according to the requirement of products.