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
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