Outdoor High-Voltage AC Vacuum Circuit Breaker
ZW32 Spring-Operated/Permanent Magnet Type
Safe and reliable vacuum arc extinction, fully sealed structure for maintenance-free operation, compact and lightweight, configurable with intelligent control, flexibly adapting to various urban and rural grid scenarios.
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.
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Product Advantages
Flexible and Convenient Operation
Electric energy storage, electric opening and closing, with manual operation support.
Low Operating Power and High Reliability
Newly designed compact electric mechanism with low energy consumption for opening and closing.
High-Performance Materials
The switch enclosure has excellent corrosion resistance.
Outdoor High-Voltage AC Vacuum Circuit Breaker
zw32
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 |
