Title :
On the Calibration of Direct-Current Current Transformers (DCCT)
Author :
Callegaro, L. ; Cassiago, C. ; Gasparotto, E.
Author_Institution :
Electromagn. Div., Ist. Naz. di Ricerca Metrol., Turin, Italy
Abstract :
Modern commercial dc current transformers (DCCTs) can measure currents up to the kiloampere range with accuracies better than 1 × 10-5. We discuss here a DCCT calibration method and its implementation with commercial instruments typically employed in low-resistance calibration laboratories. The primary current ranges up to 2 kA; in the current range <;100 A, the calibration uncertainty is better than 3 × 10-7. An example of calibration of a high-performance DCCT specified for primary currents measurement up to 900 A is discussed in detail.
Keywords :
calibration; current transformers; electric current measurement; measurement uncertainty; DCCT; calibration uncertainty; direct-current current transformer; low-resistance calibration laboratory; primary current measurement; Accuracy; Calibration; Current measurement; IP networks; Integrated circuits; Standards; Windings; Calibration; current measurement; magnetic sensors; metrology; transducers; transducers.;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2014.2359812
