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The ZW8-12 high-voltage vacuum circuit breaker combines the world’s latest permanent magnet mechanism and epoxy resin integral casting solid insulation technology and other advanced technologies, and adopts vacuum breaking technology, which has long electrical life, reliable breaking and long-term complete immunity. Maintenance features:The product has many advantages such as small size, light weight, convenient operation, reliable operation, pollution-free, and maintenance-free.
Use environment
1.Ambient temperature: not higher than +40 °C, not less than -40°C
2. Altitude: not exceed 2000m.
3. Relative humidity: daily average of not more than 95%, month average of not more than 90%.
saturated vapor pressure daily average of not more than 2.2 × 103MPa, month average not more than 1.8 × 103MPa.
4. Earthquake intensity: not more than eight.
5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.
Item | Description | Unit | Data | |
1 | Rated voltage | KV | 12 | |
2 | Rated current | A | 630(1250) | |
3 | Rated short circuit breaking current | KA | 20/25/31.5 | |
4 | Rated short circuit making current | KA | 16/31.5/50 | |
5 | Rated peak withstand current | KA | 16/31.5/50 | |
6 | 4S Rated withstand current | KA | 6.3/12.5/20 | |
7 | Rated insulation level | frequency withstand voltage | 42 | |
Impulse withstand voltage | 75 | |||
8 | Rated operating sequence | O-0.3s-CO-180S-CO | ||
9 | Mechanical life | Times | 10000 | |
10 | Rated short circuit current breaking time | Times | 30 | |
11 | Rated close brake voltage of operating machine | V | AC DC110,220 | |
12 | Rated break brake voltage of operating machine | V | AC DC110,220 | |
13 | Contact stroke | mm | 11±1 | |
14 | Exceed range(the compress length of contact spring) | mm | 3.5±0.5 | |
15 | Different period of three-phase break and close break | ms | ≤2 | |
16 | The jump time of contact close break | ms | ≤2 | |
17 | Average break speed | m/s | 0.9~1.5 | |
18 | Average closing speed | m/s | 0.4~0.8 | |
19 | Closing time | s | 0.1 | |
20 | Contacts limit | mm | 3 | |
