Title :
Investigated drift of the CT error and an aluminum shielding
Author :
Takahashi, Kunihiko ; Yamawaki, Masao ; Tadokoro, Takuya
Author_Institution :
Japan Electr. Meters Inspection Corp., Tokyo, Japan
Abstract :
The drift of the error of a window-type high current transformer(CT) was observed by an automated calibration system that consists of a current comparator(CC) [1] and a current ratio transfer standard(CRTS) [2]. Furthermore, the shielding by means of aluminum plates for preventing local magnetic saturation is also proposed in this paper.
Keywords :
aluminium; calibration; current transformers; electric current measurement; magnetic shielding; measurement errors; transfer standards; aluminum shielding; automated calibration system; current comparator; current ratio transfer standard; current transformer error drift; local magnetic saturation; window type high current transformer; Aluminum; Calibration; Current measurement; Current transformers; Impedance; Measurement uncertainty; Windings; current comparator; current transformer calibration; exciting impedance; magnetic saturation; window-type current transformer;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6250707
