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Measurements are performed the power network, which allows omitting imperfections and limitations of methods based on simulations.\ninsulation resistance meters and standards in the range up to 15 kV and 20 TΩ and standards up to 40 TΩ at voltage up to 1 kV. This service is unique in the world.\nsmall resistance meters for measuring currents from fractions of mA to several hundred amperes.