A Coaxial Time Constant Standard for the Determination of Phase Angle Errors of Current Shunts

This paper describes a new method to determine the phase angle errors of ac shunts by measuring the inductance and distributed capacitance. A 1-Ω shunt of coaxial design has been developed as the time constant standard. A coaxial inductor with identical structure as the time constant standard has be...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 2013-01, Vol.62 (1), p.199-204
Main Authors: Pan, Xianlin, Zhang, Jiangtao, Ma, Xuefeng, Gu, Yang, Liu, Wenfang, Wang, Biao, Lu, Zuliang, Zhang, Deshi
Format: Article
Language:English
Subjects:
Binary inductive current divider (BICD)
Bypasses
Current measurement
current shunt
Errors
four-terminal mutual inductor
Frequency measurement
Inductance
Inductors
Instrumentation
residual inductance
Shunt (electrical)
Shunts
substitution method
Time constant
Uncertainty
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Summary:This paper describes a new method to determine the phase angle errors of ac shunts by measuring the inductance and distributed capacitance. A 1-Ω shunt of coaxial design has been developed as the time constant standard. A coaxial inductor with identical structure as the time constant standard has been developed. A four-terminal mutual inductor has also been built for the measurement of the inductance of the time constant standard. The method is based on the use of a binary inductive current divider to compare the inductor with the mutual inductor. The standard uncertainty of the inductance measurement of the time constant standard is within 28 pH at frequencies up to 200 kHz. The expanded uncertainty of the phase angle errors is from 0.4 μrad at 1 kHz to 80.0 μrad at 200 kHz at 1 A.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2012.2212595