ZW38-12 outdoor high voltage vacuum circuit breaker
1.vacuum circuit breaker with IEC standard
2.Rated voltage 12KV
3.Rated current 630/1250A
4.Rated short-circuit breaking curr
ZW38-12 outdoor high voltage vacuum circuit breaker is appropriate to 12kv, 50Hz three phase alternating current system, applicable for power grid breaking, loading current, overload current and circuit breaking current closing in transformer substation and power system of industrial and mining enterprises. They can be used as segment switch. When assembled with controller it can realize automation of distribution network.
Ambient condition
1 Ambient temperature: max +40°C min –35°C
2 Altitude: ≤2500m
3.Wind pressure: ≤700Pa(equals to wind speed 34m/s)
3 Earthquake intensity: ≤8 degree
4 Air contamination degree: III degree
5 Max daily temperature variation: ≤25°C
Order instruction
Complete model and order quantity of the product
Rated current, rated voltage
Rated short circuit breaking current, operation voltage
Required accessory and quantity
Other requirement please contact with us directly
| Main Technical Data | ||||
| Rated voltage | kv | 12 | ||
| Rated frequency | Hz | 50 | ||
| Rated lighting impulse withstand voltage | kv | 75 | ||
| Rated short-time power frequency withstand voltage(dry) | kv | 42 | ||
| Rated short-time power frequency withstand voltage(humid) | kv | 30 | ||
| Rated current | A | 630/1250 | ||
| Rated short-circuit breaking current | kA | 20 | ||
| Rated short-circuit making current | kA | 50 | ||
| Rated short-time withstand current(4s) | kA | 20 | ||
| Rated peak withstand current | kA | 50 | ||
| Rated operations of short-circuit breaking current interruption | times | 30 | ||
| Power frequency withstand voltage of secondary circuit(1 min) | v | 2000 | ||
| Mechanical life | times | 10000 | ||
Mechanical characteristics adjustment data
Rated contact stroke mm 9±1
Contact overtravel mm 2±0.5
Average opening speed m/s 1.2±0.3
Average closing speed m/s 0.6±0.2
Contact bouncing duration at closing operation ms ≤2
Core distance between phases mm 340±1.5
Three-pole simultaneity ms ≤2
Condactive circuit resistance of each phases μΩ <80
Closing time ms 20~40
Opening time ms 30~60
