Title :
A method to eliminate birefringence of a magneto-optic AC current transducer with glass ring sensor head
Author :
Ma, Xianyun ; Luo, Chengmu
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
fDate :
10/1/1998 12:00:00 AM
Abstract :
This paper reports a novel method of assembling a magneto-optical current transducer, which can eliminate both thermal transient and construction-caused birefringence to a large extent. The method is simple and practical, and needs no temperature compensation in signal processing. With a closed aluminum shell, sensing material buffers and flexible construction, the accuracy of the compromise-developed MOCT with glass ring sensor head was better than 0.3% over a temperature range of -30 to 70°C and current range from 100 to 2400 A. The field testing verified this performance
Keywords :
birefringence; electric current measurement; magneto-optical sensors; transducers; -30 to 70 C; 100 to 2400 A; birefringence elimination; closed aluminum shell; construction-caused birefringence; field testing; glass ring sensor head; magneto-optic AC current transducer; material buffers sensing; signal processing; thermal transient birefringence; Aluminum; Assembly; Birefringence; Building materials; Glass; Magnetic materials; Magnetic sensors; Signal processing; Temperature sensors; Transducers;
Journal_Title :
Power Delivery, IEEE Transactions on
