Sichuan preferred Tengen power voltage vacuum circuit breaker [rival] ZW8-12 / 630-20 outdoor high voltage vacuum circuit breaker is rated voltage 12kV, three-phase AC 50Hz outdoor distribution equipment, mainly used for breaking, closing the city urban 10kV grid load current, load current, short-circuit current. Also available for the rural power grid sub-switch and small power system, is urban and rural power oil-free replacement products. Vacuum interrupter, air insulated, with electric spring operating mechanism, allowing for strong extinguishing capacity, high short-circuit breaking times, no fire and explosion hazard, easy to operate, is an excellent, practical, strong product. This product uses the overall structure of the three-phase total box-type casing inlet and outlet, cabinets for dry air, electric spring mechanism disposed in the side of the box, and can be used under relatively harsh environmental conditions. This product is vacuum interrupter ceramic shell, goblet longitudinal magnetic field structure contacts, copper chromium contact material with excellent breaking and closing short-circuit current capability. The product is small, light weight and good looks. Vacuum interrupter and insulation support casing design compact, pole qualifying conductive silicone rubber outer note, can adapt to harsh weather conditions and dirty environments. Second, the use of environmental conditions surrounding air temperature: -40 ℃ ~ + 40 ℃; Altitude: not exceed 2000m; ambient air can be contaminated dust, smoke, corrosive gases, vapors or salt; the wind speed does not exceed 34m / s ( 700Pa on the cylindrical surface equivalent); vibration or earth from the switchgear and control equipment at the Ministry is negligible; contamination level: Ⅲ grade. Third, the model and the meaning of the Fourth, the main technical parameters No. Item Unit Parameter 1 Rated voltage kV 12 2 Rated current A 630 3 kV 42/48 4 frequency withstand lightning impulse withstand voltage (peak) kV 75/85 5 rated short-circuit breaking current (rms) kA 20 6 rated short-circuit current (peak) kA 50 7 Rated operating sequence points -0.3s close together in eight points -180S rated short-circuit current breaking times 309 times Mechanical life 1000010 Rated operating voltage (close / brake coil) V Dc220 Ac220 11 static and dynamic contact permission attrition thickness mm 3 12 isolated fracture opening distance mm> 200 V. Product main organization chart