EVN-12 Indoor Vacuum Circuit Breaker
The EVN-12 is the latest generation 12kV indoor vacuum circuit breaker independently developed by NAIJI Electric. Features solid-sealed poles with miniaturized ultra-low resistance vacuum arc chambers cast in epoxy resin. M2-E2-C2 performance level with 30,000-cycle mechanical life.
Основные характеристики
- 12kV rated voltage, up to 5000A rated current
- Up to 50kA short-circuit breaking capacity
- Mechanical life: 30,000 operations
- M2-E2-C2 performance level (GB & IEC)
- Solid-sealed poles with ultra-low resistance vacuum chambers
- Convection ventilation for reduced temperature rise
- Silver-plated main conductors for lower contact resistance
- Modular spring mechanism — maintenance-free with self-lubricating bearings
- Oil buffer with optimized cam curve — reduced rebound
Технические характеристики
| Rated Voltage | 12 kV |
| Rated Current | Up to 5000 A |
| Rated Short-Circuit Breaking Current | 50 kA |
| Mechanical Life | 30,000 operations |
| Performance Level | M2-E2-C2 (GB & IEC) |
| Insulation | Epoxy resin solid-sealed poles |
| Cooling | Convection ventilation |
| Operating Mechanism | Modular spring mechanism |
Применение
Соответствие стандартам
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