The ZW32-12 outdoor vacuum circuit breaker is designed for power systems with a rated voltage of 12kV and a frequency of 50Hz. It is mainly used to break and close load currents, overload currents, and short-circuit currents in the power system. This circuit breaker is ideal for use in substations and industrial distribution systems, as well as in rural power grids and areas requiring frequent operations. The ZW32-12 features a compact size, lightweight design, anti-condensation properties, and maintenance-free operation, making it suitable for harsh climates and polluted environments.
| Type | ZW32-12 |
| Rated Voltage | 12kV |
| Rated Frequency | 50Hz |
| Rated Current | 630A |
| Rated Short-Circuit Breaking Current | 20kA |
| Rated Peak Withstand Current (Peak) | 50kA |
| Rated Short-Time Withstand Current | 20kA |
| Rated Short-Circuit Making Current (Peak) | 50kA |
| Mechanical Life | 10000/Times |
| Rated Short-Circuit Breaking Current Interrupting Times | 30/Times |
| Power Frequency Withstand Voltage (1min), (Wet) (Dry) Phase-to-Phase, Phase-to-Ground/Break | 42/48kV |
| Lightning Impulse Withstand Voltage (Peak) Phase-to-Phase, Phase-to-Ground/Break | 75/85kV |
| Secondary Circuit 1min Power Frequency Withstand Voltage | 2kV |
| Allowable Cumulative Wear Thicknessof Moving / Stationary Contacts | 3mm |
| Overcurrent Release Rated Current | 5A |
| Current Transformer Ratio | 200/5, 400/5, 600/5 |
| Contact Gap | 9±1mm |
| Contact Over-Travel | 2±0.5mm |
| Average Opening Speed | 1.2±0.3m/s |
| Average Closing Speed | 0.6±0.2m/s |
| Opening Time | 20~40ms |
| Closing Time | 30~60ms |
| Closing Bounce Time | ≤2ms |
| Three-Pole Closing / Opening Asynchronism | ≤2ms |
| DC Resistanceper Phase Circuit | ≤80μΩ (WithIsolation: ≤150) |
