Title :
On-site calibration system for isolation current transformers
Author_Institution :
Phys.-Tech. Bundesanstalt (PTB), Braunschweig, Germany
Abstract :
An on-site calibration system for three-phase isolation current transformers is described. It is based on precise power comparators which are shipped to the customer. Measurements can be done at test currents up to 120 A. The measurement uncertainties of the self-calibrating measurement system are in the order of 0.005% for the ratio error and 0.01 crad for the phase displacement at power frequencies.
Keywords :
calibration; current transformers; current transformer; phase displacement; power comparator; self calibrating measurement system; test currents; Automatic testing; Calibration; Current measurement; Current transformers; Displacement measurement; Frequency measurement; Measurement uncertainty; Phase measurement; Power measurement; System testing;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5545013
