Title :
Research on high accuracy current comparator and self-calibration methods
Author :
He Xiaobing ; Wang Wei ; Zhang Xin ; Dai Dongxue ; Sun Qian
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
This paper introduces the working principle of a high accuracy current comparator. For reducing the error caused by the capacitive leakage current while testing current flows through the secondary winding, the secondary winding is coiled of coaxial cable. Cooperating with well shielding, changing the turns of secondary winding will not bring extra error any more. This paper also presents a new self-calibration method for 1:1 current comparator, it could be applied to multi-ratio current comparator with high accuracy and operation convenience.
Keywords :
calibration; coaxial cables; current comparators; leakage currents; transformer windings; capacitive leakage current; coaxial cable; current transformer; error reduction; high accuracy current comparator; multiratio current comparator; secondary winding; self-calibration method; testing current; Accuracy; Coaxial cables; Current measurement; Leakage current; Testing; Windings; Wires; capacitive leakage; current comparator; selfcalibration;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6251015
