Comparison tests of high current shunts in high power laboratories in Asia with an STL reference shunt

To establish traceability for high current measurements, comparison tests of high current shunts in high power laboratories have been carried out with STL reference shunts since 2005. In this paper, we describe the comparison test results of shunts in high power laboratories in Asia. Test results showed the shunts tested for the comparison tests performed well and most of the differences of the scale factor with the power frequency current between the reference shunt and those tested in participating laboratories were less than 0.5%.