Inter-comparison of high current measurement in high power laboratory

It is always a difficult topic for the quality trace-ability of short-circuit high current measurement, because there's not a common standard to evaluate overall behavior of the measuring system., STL (Short-Circuit Testing Liaison) began to organize a technical activities, called inter-comparison of short-circuit high current in high power laboratory in 2003. The inter-comparison of short-circuit high current measurement was carried out in XIHARI in September 2006. It's the first time in China to do the work. During the inter-comparison tests, a total of 5 items, including scale factor test, linearity test, interference test, high frequency current test, measurement of the resistance, were performed with maximum current of 90 kA rms, 213 kA peak. The results show that the reference measuring system used in XIHARI is deviated to the STL reference one with 0.3%.