Title :
A new self-calibrating instrument for voltage transformer calibration
Author_Institution :
Dept. of Meas. & Instrum. Eng., Tech. Univ. Budapest, Hungary
Abstract :
A new current comparator and digital ratio-meter based self-calibrating instrument for voltage transformer calibration has been developed at the Technical University of Budapest. The instrument measures the in-phase and quadrature components of the complex error by means of a digital ratio-meter. The built-in programmable analog signal processor facilitates comparison and direct calibration of voltage transformers of different ratios. Advanced hardware and software technology ensure complete on-site self-calibration of the instrument. The basic accuracy of the instrument is /spl plusmn/2 ppm with 1 ppm resolution.
Keywords :
calibration; current comparators; potential transformers; power transformer testing; production testing; current comparator; digital ratio-meter; direct calibration; in-phase components; on-site self-calibration; programmable analog signal processor; quadrature components; self-calibrating instrument; voltage transformer calibration; Application specific processors; Calibration; Hardware; Instruments; Power measurement; Resistors; Signal processing; Testing; Voltage control; Voltage transformers;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547179
