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Developed and approved in 2007 Secondary Standard of AC voltage scale transformation coefficient (VSTC) unit at primary rated voltages of 400 / radic3 kV and 500 / radic3 kV is described below.
Results of development of precise low frequency measuring system for traceability of high current transformer standards are given. Comparative investigations of developed standards on Russian Federation primary standard where been provided and results are shown.
Developed and produced mobile standard of voltage scale transformation coefficient (VSTC) is described below. Mobile standard is intended for transfer of VSTC unit to voltage transformers working standards and precision working voltage transformers on the places of their installation at the frequency 50 Hz for voltage classes 110, 150, 220 and 330 kV
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