Title :
A new self-calibrating standard instrument for current transformer calibration
Author_Institution :
Dept. of Meas. & Instrum. Eng., Tech. Univ. Budapest, Hungary
fDate :
June 27 1994-July 1 1994
Abstract :
A new current comparator-based self-calibrating instrument for current transformer calibration has been developed. The instrument measures the in-phase and quadrature components of the error by means of a digital vector voltmeter. The built-in ratio matching unit makes it possible to compare current transformers of different ratios. A set of built-in auxiliary windings ensure complete on-site self-testing of the instrument. The ratio matching unit can be tested and calibrated by the anti-offset method. The basic accuracy of the instrument is 2 ppm with 0.1 ppm resolution.<>
Keywords :
built-in self test; calibration; current transformers; digital voltmeters; electric current measurement; measurement errors; anti-offset method; built-in auxiliary windings; built-in ratio matching unit; current transformer calibration; digital vector voltmeter; in-phase components; on-site self-testing; power industry; quadrature components; ratio matching; self-calibrating instrument; self-calibrating standard instrument; voltmeter test; zero point test; Automatic testing; Built-in self-test; Calibration; Current measurement; Current transformers; Instruments; Power measurement; Protection; Velocity measurement; Voltmeters;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333241
