Title :
Stepping up AC-DC current up to 20 A
Author :
Jing, T. ; Chua, S.W. ; Sim, J. ; Ma, C.H.
Author_Institution :
Nat. Metrol. Centre, A* STAR, Singapore
Abstract :
This paper describes the AC/DC current stepping up arrangement and results at the National Metrology Centre (NMC). Planar multi-junction thermal converters (PMJTCs) were used with a set of coaxial current shunts to build up the AC-DC current transfer standards for the range from 10 mA to 20 A at frequency range of 10 Hz to 100 kHz. Current level-dependence of the PMJTCs at low frequencies was determined experimentally. The resulted AC-DC differences agree well with known calibration with expanded uncertainties of less than 55 muA/A at 20 A for frequencies from 10 Hz to 100 kHz.
Keywords :
AC-DC power convertors; calibration; electric current measurement; measurement standards; measurement uncertainty; AC-DC current transfer standards; National Metrology Centre; PMJTC current level-dependency; calibration; coaxial current shunts; current 10 mA to 20 A; frequency 10 Hz to 100 kHz; measurement uncertainties; planar multijunction thermal converter; stepping up AC-DC current; Analog-digital conversion; Calibration; Coaxial components; Current measurement; Frequency conversion; Measurement standards; Metrology; Stress measurement; Testing; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574800
