| Title |
Precise Measurement of High Current Shunt Resistance |
| Authors |
김규태(Kim K.-T.) ; 한권수(Han K.-S.) ; 권성원(Kwon S.-W.) ; 김문석(Kim M.-S.) ; 정주영(Jeong J.Y.) ; 김익수(Kim I.S.) |
| Keywords |
분류기 ; 저저항 ; 대전류 ; 정밀측정 ; 교류저전압 ; |
| Abstract |
Precise measurement of extremely low resistance shunt is important for characterization and calibration of high current instruments. We tested resistance measurement method for extremely high current shunt (up to 140 kA), where resistance is determined by precise measurement of voltage drop at 10 A test current in the frequency range of 40 Hz to 10 kHz. For the extremely low ac voltage to be precisely measured, a verification of the measurement method was also carried, where the inherent noise is systematically evaluated. The measurement uncertainty was estimated to be 1 % at 95 % confidence level (k=2) for about 50 μΩ. |