... ac50Hz,it is suitable for power system of rated
voltage 40.5Kv, have the advantages of advantaged design, ... : +40°Cb) Lower limit general area: -30°Cc)
High and cold area: -40°C3) The wind pressure does not ... <
high-voltage isolating switch>>,IEC129(1984)<high voltage isolating switch and groud switches>> with the IEC694(1980)<<high-voltage switch equipments ...