ZW32-12kV Intelligent Outdoor Pole Mounted Vacuum Circuit Breaker

  • Rated Voltage:12kV three-phase AC 50Hz/60Hz for outdoor use
  • Vacuum Interruption:Ceramic chamber, CuCr contacts, stable arc extinguishing
  • Weather Resistance:Silicone-rubber insulation, anti-condensation, maintenance-free for 20 years
  • Control Options:Compatible with permanent magnet or spring operating mechanisms
  • Smart Operation:Supports reclosing, remote control, sectionalizer configuration
  • Eco Design:Oil-free, SF6-free, stainless steel or Dacromet-coated enclosure
  • Sealed Structure:Fully enclosed design enhances moisture-proof and rust resistance
Describe Display

ZW32-12kV intelligent outdoor pole-mounted vacuum circuit breaker is a three-phase AC 50Hz/60Hz primary switching device, rated at 12kV. It is designed for breaking load, overload, and short-circuit currents in power distribution systems. Widely used in substations, industrial facilities, and rural grids, the breaker ensures safe and efficient operation, particularly in environments with frequent switching activities.

 

Integrated with intelligent controllers, the breaker meets the needs of automated power distribution networks. It features a modular design with high-performance arc extinction, long service life, and weatherproof insulation. The device supports remote control, reclosing, and sectionalizing functions, making it ideal for modern grid automation.

Product parameters
Rated Technical Parameters of Vacuum Circuit Breaker

 

No. Items Unit Value
Rated voltage kV 12
Rated current A 630, 1250
Rated frequency Hz 50/60
Rated short-circuit breaking current kA 20, 25
Rated peak withstand current 50, 63
Rated short-time withstand current (4s) 20, 25
Rated short-circuit making current (Peak) 50, 63
Number of Mechanical Operations Time 10000
Rated operating sequence   O-0.3s-CO-180s-CO
10  Rated power-frequency withstand voltage (1min):
Between phases and Phase to earth
kV 42
10  Rated power-frequency withstand voltage (1min):
Across the isolating distance.
48
11  Rated lightning impulse withstand voltage (Peak):
Between phases and Phase to earth
kV 75
11  Rated lightning impulse withstand voltage (Peak):
Across the isolating distance.
85
12  1 min power frequency withstand voltage of secondary circuit kV 2
13  Net Weight kg 85

 

 

Mechanical Properties Parameters of vacuum circuit Breaker

 

No. Items Unit Value
1 Contact spacing mm 8~10
2 Contact overtravel 2~3
3 Average closing speed m/s 0.75±0.2
4 Average opening speed 1.25±0.2
5 Contact closing bounce time ms ≤2
6 Three-phase opening Simultaneous time difference ≤2
7 Closing time ≤60
8 Breaking time 20~60
9 Each phase circuit resistance μO ≤80
10 Conductive loop resistance per phase
(With disconnecting switch)
<200
11 Distance between phases outside the box mm 340±3
12 Allowable cumulative wear thickness
of dynamic and static contacts
3

 

 

Technical Parameters of Motor and Opening-Closing Coil

 

Items Rated operating voltage(V) Rated power Rated operating current (A) Normal working range
Motor -200 40 0.5 85%-110% rated operating voltage
-110  
-48 1.8
-24 4.6
Opening and
Closing Coil
-220 372 1.69 Opening: 65%-120% rated operating voltage,
30% rated Voltage should not trip.
-110 374 3.4
-48 480 10
-24 276 11.5
Size/Installation

Features

Three-phase separated column structure to prevent three-phase short circuit during single-phase faults

 

Ceramic vacuum interrupter with copper-chromium contacts ensures low contact wear and stable performance

 

Silicone-sealed arc chamber prevents internal condensation and supports 20-year maintenance-free operation

 

Outer insulation: outdoor epoxy resin or silicone rubber with hydrophobic and pollution-resistant properties

 

Operating mechanisms: optional permanent magnet or spring mechanism, mechanical life over 10,000 operations

 

Housing: stainless steel or Dacromet-treated shell for corrosion resistance and environmental durability

 

External CTs and anti-inrush composite controllers enable accurate fault detection and delayed closing

Related Notes
Additional Notes

 

Usage Conditions: -40°C to +40°C, ≤2000m altitude, wind ≤35m/s, seismic ≤8°, pollution level IV

Installation Tips: Use lifting rings, avoid stress on insulating sleeves, level mounting base required

Storage: Store in dry, ventilated, shock-proof, gas-proof environment; avoid prolonged stacking

Commissioning: Perform withstand voltage tests (48kV open, 42kV phase-ground), ensure mechanical performance

Maintenance: Every 5 years; check insulation, mechanism wear, fasteners, and re-lubricate moving parts

Safety Reminder: Always disconnect power before maintenance; beware of stored mechanical energy in springs

 

 

Customized Solutions

 

The parameters listed above are standard references. If these styles do not fulfill your specific requirements, feel free to reach out to us for a bespoke design. With strong capabilities in personalized development and production, we offer tailored solutions to clients worldwide.

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Our certification team consists of 85+ engineers with more than 20 years of professional experience
24/7 Service. Average emergency response time is limited to less than 12 hours
Suitable for substations, industrial power grids, new energy projects and other demanding scenarios
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