History of Science and Engineering Annotation << Back Activity of the department of metrological assurance of electric measurements in the industry V.V. Kiselev The documents on development and creation of the State primary special measurement standard (GPSE) of scale factor units (Кu) and of a phase shift (ju) of electric voltage of alternating current of industrial frequency are presented. Composition GPSE KU and ?U, its metrological and technical characteristics, results of the international comparisons are presented. Examples of GPSE Кu and ?u application field are shown. The analysis of economic efficiency of introduction of the given standard into science and industry is carried out. Key words: measurement standard; scale factor; phase shift; scale voltage converter; voltage transformer. E-mail: office@vniims.ru