Hkl-3s-12 Hot Selling Outdoor Type Vacuum Circuit Breaker

Outline and installation size (mm)HKL-3S-12 Hot Selling Outdoor Type Vacuum Circuit BreakerOverviewHKL-3S-12 series outdoor high-voltage three-phase permanent magnet vacuum circuit breakers are a new generation of intelligent vacuum circuit breakers on poles mounting developed by our company, which integrates domestic and foreign advanced technology, learns from others, adopts new design concepts and the latest technology. This product can be used as a pole mounting switch in the distribution network, and can be easily realized, protected, measured and communicated with various control units produced by our company. It is the first-choice equipment to realize the automation and miniaturization of the distribution network.Using conditionsWorking environment temperature: ≤ 40°C; daily average temperature ≤ 35°C, minimum ambient temperature is -25°C;Relative air humidity: daily average value ≤ 95%, monthly average value ≤ 90%; daily average water vapor pressure ≤ 2.2kPa; monthly average value ≤ 1.8kPa;Altitude: ≤ 2000m;The amplitude of induced electromagnetic interference in the secondary system ≤1.6kVTechnical parameterItemUnitSpecificationRate voltagekV40.5Rate currentA630/1250Rate frequencyHz50Power frequency withstand voltage(value)kV42Lightning impulse withstand current (peak)kV75Rated short-circuit breaking currentkA20Rated short-circuit making current (peak)kA50Dynamic peak withstand currentkA50Thermal withstand current,4SkA20Rated operating cycle O-0.3s -CO-3s -CO-3s CORated short-circuit current breaking timestimes30Mechanical lifetimes10000Working power supply voltageV220(110)Creepagemm/kV≥31  ItemUnitSpecificationContact strokemm11±1Contact over-travelmm3±0.5Opening average speedm/s0.6±0.2Closing average speedm/s1.0-1.4Contact closing bouncing durationms≤2Center distance between phasesmm280±2Closing synchronism between poles ms≤2Opening synchronism between polesms≤2Conductive loop resistance of each phaseμΩ