Title :
High precision range extenders for an AC calibrator up to 600 V and 100 A
Author :
Miljanic, P. ; Angelo, D.
Author_Institution :
Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
Summary form only given. The development of high-precision range extenders for high voltage (600 V) and large current (100 A) as separate units to be used with a previously developed AC calibrator is discussed. To obtain high accuracy and stable operation, an error feedforward technique was implemented. A current-comparator-based capacitance bridge was used for the gain, and phase calibration of the range extender. A precision two-stage current transformer and a very stable time-division-based watt-converter were used to verify its performances.<>
Keywords :
bridge instruments; calibration; comparators (circuits); electric current measurement; voltage measurement; 100 A; 600 V; AC calibrator; capacitance bridge; current comparator; error feedforward technique; gain calibration; phase calibration; two-stage current transformer; Bridge circuits; Calibration; Capacitance; Current transformers; Error correction; Feedforward systems; High power amplifiers; Resistors; Voltage control;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.109929
