Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
Title Power Standard System for the Calibration and Test of Precision Power Meters
Authors 박영태(Park, Young-Tae) ; 유권상(Ryu, Kwon-Sang) ; 유광민(Yu, Kwang-Min) ; 장석명(Jang, Seok-Myeong)
Page pp.622-627
ISSN 1975-8359
Keywords Power comparison technique ; Resistive voltage dividers ; Power standard ; Expanded uncertainty ; Power comparator ; Resistive shuntsthermo-elements ; Thermal converter ; Wattmeter ; instrument ; Measurement
Abstract The power comparison techniques have implemented power measurements, in which a power comparator is used to balance ac against a dc power obtained from known values. The developed power standard system using the comparison techniques consists of dc sources, ac source, control switches, resistive voltage dividers, resistive shunts and a power comparator. The total uncertainty of the power standard system was proved by analysis of the component instruments. Its expanded(k=2) uncertainty is evaluated to be less than 30 uW/VA at unit power factor and 42 uW/VA at power factor 0.5