GOST R 57382-2017 United power system and isolated power systems. Electric power systems. Standardized sequence of nominal and highest operating voltages
GOST 12450-1982 A. c. circuit-breakers for voltages from 110 to 750 kV. Switching of overhead lines on no-load. Technical requirements and test methods
2017GOST R 57382-2017 United power system and isolated power systems. Electric power systems. Standardized sequence of nominal and highest operating voltages