A new self-calibrating standard instrument for current transformer calibration

Author

Zoltan, I.

Author_Institution

Dept. of Meas. & Instrum. Eng., Tech. Univ. Budapest, Hungary

fYear

1994

fDate

June 27 1994-July 1 1994

Firstpage

238

Lastpage

239

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on

Conference_Location

Boulder, CO, USA

Print_ISBN

0-7803-1984-2

Type

conf

DOI

10.1109/CPEM.1994.333241

Filename

333241