ZW20-12 Outdoor Vacuum Circuit Breaker
The ZW20-12 is a three-phase common-box type outdoor vacuum circuit breaker with longitudinal magnetic field arc extinguishing and SF6 gas insulation. Maintenance-free design with stable breaking performance, no combustion or explosion risk.
Key Features
- 12kV rated voltage, SF6 gas insulated
- Longitudinal magnetic field vacuum arc extinguishing
- Three-phase common-box structure
- Mechanical life: 10,000 operations
- Silicone rubber / epoxy resin bushings
- Power frequency withstand: 42kV (phase), 48kV (gap)
- Spring-operated mechanism — compact and lightweight
- Compatible with FTU for automated distribution
Technical Specifications
| Rated Voltage | 12 kV |
| Rated Current | 630 A |
| Insulation Medium | SF6 gas (zero gauge pressure) |
| Arc Extinguishing | Longitudinal magnetic field vacuum |
| Mechanical Life | 10,000 operations |
| Power Frequency Withstand | 42 kV (phase) / 48 kV (gap) |
| Operating Mechanism | Spring-operated |
| Temperature Range | -25°C to +40°C |
Applications
Standards Compliance
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Frequently Asked Questions
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