ZW32-12 outdoor HV vacuum circuit breaker is a 3-phase AC 50Hz 12kV outdoor switch equipment ♦ Installation way: pole mounted; ♦ Operating mechanism: spring operating mechanism and permanent magnetic operating mechanism; ♦ Pole type: upper-lower Dole one-piece pole, embedded pole; ♦ Application: outdoor 12kV substation, power plant. ♦ Operation type manual, electric, remote control.   Product Standards ♦ IEC62271-100 High Voltage Switchgear and Controlgear Part 100: AC Circuit-breakers ♦ GB1984 High Voltage AC Circuit-breakers ♦ GB/T11022 Common Specifications for High-voltage Switchgear and Controlgear Standards ♦ JB/T 3855 High Voltage AC Vacuum Circuit-breakers ♦ DL/T402 Specification of High-voltage AC Circuit-breakers   Environmental Conditions ♦ Ambient temperature: -35°C 〜+45°C; ♦ Altitude: <1000m; ♦ Wind speed < 35m/s; ♦ Earthquake intensity: <8 level; ♦ Filthy level: IV; ♦ Installation places: No fire, explosion hazard or serious filthy.   Main Technical Parameters No Item Unit Value 1 Rated voltage kV 12 2 Rated frequency Hz 50 3 Rated current A 630, 1250 4 Rated short circuit breaking current kA 20, 25 5 Rated peak value withstand current (peak) kA 40, 50 6 Rated short time withstand current kA 16, 20 7 Rated short circuit duration s 4 8 Rated short-circuit closing current (peak) kA 40, 50 9 Rated operating sequence Times O-0.3S-CO-180S-CO 10 Mechanical life(spring type/permanent magnetic type) Times 10000/30000 11 Rated circuit breaking number Times 10000 12 Rated short-circuit breaking current breaking times Times 500   No Item Unit Value 13 Power frequency withstand voltage (1min)(wet) inter-phase, earth(dry) inter-phase, earth/fracture) kV 34 42 14 Lightning impulse withstand voltage (peak) inter-phase, earth/fracture kV 75 15 Secondary circuit 1min power frequency withstand voltage except of electronic devices V 2000 16 Clearance between open contacts mm 9±1 17 Over travel mm 2±10.5 18 Opening speed m/s 1.2±0.2 19 Closing speed m/s 0.6±0.2 20 Contact closing bounce duration ms ≤2 21 Inter-phase center distance mm 340±1.5 22 Three phase closing and opening asynchronism ms ≤2 23 Each phase conductive circuit resistance μΩ ≤80 24 Closing time ms ≤75 25 Opening time ms ≤50 26 Rated power of energy storage motor W 40   General Structure Drawing and Installation Size (unit: mm) ♦ ZW32-12 ♦ ZW32-12G ♦ ZW32-12M ♦ Installation ways