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.
| No. | Items | Unit | Value |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated current | A | 630, 1250 |
| 3 | Rated frequency | Hz | 50/60 |
| 4 | Rated short-circuit breaking current | kA | 20, 25 |
| 5 | Rated peak withstand current | 50, 63 | |
| 6 | Rated short-time withstand current (4s) | 20, 25 | |
| 7 | Rated short-circuit making current (Peak) | 50, 63 | |
| 8 | Number of Mechanical Operations | Time | 10000 |
| 9 | 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 |
| 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 |
| 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 |
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
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
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.
