抄録
For application to current monitoring in electric power facilities, the authors have been developing a current sensor utilizing the Faraday effect of an optical fiber manufactured from flint glass having very small photo-elastic constant. This paper describes the result of study on constitution of the sensing system, which is composed of a sensor head, a light source, fibers for light transmission and a signal processing circuit.
Firstly, results from investigation are reported with respect to causes affecting performance and durability of the sensor. Examinations of countermeasures to them are also described. As a result of the research, it was confirmed experimentally that several means are effective to improve characteristics of the sensor. Then, design and test results of a sensor model constructed with application of the means are described. From the test results, it was proved that the model shows excellent characteristics satisfying basic requirements of the standard for conventional current transformers.
