Title :
Extension of voltage range for power and energy calibrations
Author :
Petersons, Oskars ; Nelson, Thomas L. ; Oldham, Nile M. ; Fitzpatrick, Gerald J.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
fDate :
4/1/1999 12:00:00 AM
Abstract :
A special purpose AC voltage divider system with ratios of 600, 480, 360, 277, and 240 V to 120 V has been developed to extend the range of primary electric power calibrations from 120-600 V at 50 and 60 Hz. The developmental goal has been to realize AC voltage scaling within 5 μV/V overall relative uncertainty. By employing a technique consisting of a special two-stage resistive divider compensated with an active circuit, the overall uncertainty achieved after calibration is 4 μV/V
Keywords :
active networks; bridge circuits; calibration; energy measurement; measurement standards; measurement uncertainty; operational amplifiers; power measurement; voltage dividers; 120 to 600 V; 50 Hz; 60 Hz; AC voltage divider; AC voltage scaling; active circuit compensated; energy calibration; op amp; overall uncertainty; precision measurement; primary electric power calibration; special purpose system; two-stage resistive divider; voltage range extension; Active circuits; Bridge circuits; Calibration; Circuit stability; Equations; Feedback loop; Power measurement; Resistors; Transformers; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
