Standard voltage transformer is mainly used in the field of measurement of electrical products, and suitable for error measurement of power voltage transformers in factory tests or field hand-over tests, used as a transfer standard of voltage magnitude. The product has the advantages of high measurement accuracy, strong anti-interference ability, good insulation performance, convenient transportation, etc., which maintains the international leading level. The market share of our products is more than 90%, and the voltage class can reach the top level in the world.