Outdoor High-Voltage AC Vacuum Circuit Breaker
ZW32 Spring-Operated/Permanent Magnet Type
Vacuum arc extinguishing ensures safety and reliability, and the fully sealed structure requires zero maintenance. It features a compact size and lightweight design, supports configurable intelligent control, and flexibly adapts to multiple scenarios in both urban and rural grids.
Product Description
The ZW32 pole-mounted circuit breaker is an outdoor distribution switchgear rated at 12kV, three-phase AC 50Hz. It features both manual and electric operation modes, primarily used for opening and closing load currents, overload currents, and short-circuit currents in power systems. Widely applied in substations and industrial/mining enterprise distribution systems, it is especially suitable for rural power grids and locations with frequent operations.
Product Advantages
Outdoor High-Voltage AC Vacuum Circuit Breaker
Rated Parameters and Insulation Performance
| Item | Value | Unit |
| Rated Voltage | 12 | kV |
| Rated Frequency | 50 | Hz |
| Rated Current | 630 | A |
| Rated Short-Circuit Breaking Current (RMS) | 20/25 | kA |
| Rated Peak Withstand Current (Peak) | 50/63 | kA |
| Rated Short-Time Withstand Current (4s) (RMS) | 20/25 | kA |
| Rated Short-Circuit Making Current (Peak) | 50/63 | kA |
| Mechanical Life | 10000 | Cycles |
| Number of Short-Circuit Breaking Operations | 30 | Cycles |
| Power Frequency Withstand Voltage (1min): Phase-to-Phase, Phase-to-Ground/Open Contact (RMS) | 42/48 | kV |
| Lightning Impulse Withstand Voltage (Peak) | 75/85 | kV |
Mechanical Characteristics
| Parameter | Value | Unit |
| Contact Gap | 9±1 | mm |
| Contact Over-travel | 2.5±0.5 | mm |
| Opening Speed | 1.25±0.2 | m/s |
| Closing Speed | 0.75±0.2 | m/s |
| Contact Bounce Time | ≤2 | ms |
| Phase-to-Phase Center Distance | 340±2 | mm |
| Three-Phase Non-Simultaneity | ≤2 | ms |
| Conductive Circuit Resistance per Phase | ≤70 | μΩ |
| Closing Time | ≤60 | ms |
| Opening Time | ≤45 | ms |
| Rated Power of Charging Motor | 40 | W |
