Abstract
The article is devoted to the results of research of metrological characteristics of the newly created State primary standard of the unit of scaling factor of alternating current (AC) voltage up to 750/√3 kV. Until 2019, there was no metrological support for ultra-high voltage measurements in Ukraine. From 2016 to 2019, the State Enterprise "Ukrmetrteststandard" carried out research work on the development of the state primary standard unit of scaling factor of AC for ultra-high voltage. The created standard became the basis for metrological support of measurement of ultrahigh voltages of alternating current. The standard using for calibration of precision ultra-high voltage measuring transformers in the energy sector of the national economy. The created standard consists of a set of high-precision measuring instruments and is stored in a specially equipped laboratory. For reproduction and keeping of unit of scaling factor of AC voltage the method of comparison of currents with use of the bridge of AC and two measuring condensers is used. The article analyzes the conditions of keeping and using of the newly created standard, methods of measurement and reproduction of the unit of scaling factor of AC voltage. The results of the study of metrological characteristics of the standard are presented, which confirmed the characteristics regulated for the standard.
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