Comparison of a Thermal AC Voltage Standard in the 1–30-MHz Frequency Range

This article presents results of a comparison of a traveling ac voltage standard, which was a fused-silica planar multijunction thin-film thermal converter (PMJTC) developed at the National Institute of Standards and Technology (NIST). The ac-dc voltage-transfer difference of the standard was measured at 2 V and selected frequencies from 1-30 MHz against primary thermal ac voltage standards at the Silesian University of Technology, Istituto Nazionale di Ricerca Metrologica, RISE Research Institutes of Sweden, and Trescal A/S Silkeborg

A calorimetric measuring system for measurement of loss in high voltage cable conductors

A calorimetric measuring system for measuring the ratio between AC and DC resistance, RAC/RDC, of high voltage power cable conductors has been designed and constructed. An uncertainty analysis predicts that the ratio RAC/RDC at 90°C of a 2500 mm2 cable of low loss design can be measured with an uncertainty of 1,0%. But the uncertainty of an actual measurement was larger due to unresolved sources of uncertainty.The work reported here has received support from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme.</p

International Comparison of 50/60 Hz power (1996-1999)

2 p. : il.An International Comparison of 50/60 Hz Power is described. The traveling standard was an electronic power transducer which was tested at 120 volts, 5 amperes, 53 hertz, at five power factors (1.0, 0.5 lead, 0.5 lag, 0.0 lead, and 0.0 lag). Fifteen National Metrology Institutes from six Metrology Regions participated in the comparison