Overview
XH12-GD is a vacuum circuit breaker that uses vacuum arc extinguishing technology. It can serve as a circuit breaker and isolation switch in the power system. Compared to traditional oil immersed or gas circuit breakers, three station vacuum circuit breakers have superior performance and can meet special power system requirements.
Operating Conditions
1. Altitude: ≤ 1000 meters
2. The environment temperature: upper limit +40℃, lower limit -25℃
3. Relative humidity: daily average <95%, monthly average <90%;
4. Earthquake intensity: no more than 8 degrees;
5. There is no fire, explosion hazard, serious pollution, Places subject to chemical corrosion and severe vibration.
Model and meaning
Technical Data
| Item | Unit | Parameter |
| Rated voltage | kV | 12 |
| 1min power frequency withstand voltage | 42/48 | |
| Rated lightning impulse withstand voltage (peak) | 75/85 | |
| Rated current | A | 630,1250 |
| Rated frequency | Hz | 50/60 |
| Rated short-circuit breaking current | kA | 25/31.5 |
| Rated short-time withstand current | 25/31.5 | |
| Rated peak withstand current | 50/63 | |
| Rated short-circuit current breaking times | Times | 30 |
| Mechanical life (isolation switch/circuit breaker/grounding switch) | Times | 3000/10000/3000 |
| Rated short-circuit current breaking times | Times | 30 |
| Mechanical life | 10000 | |
| The accumulative thickness of allowable wear of moving and static contacts | mm | 3 |
| Rated operating sequence | / | O-0.3s-CO-180s-CO |
Overall and mounting dimensions(mm)
