High Voltage Circuit Breaker
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Quality/Safety Certification: 0.00
High voltage SF6 Circuit Breaker
three phase outdoor circuit breaker
spring mechanism
dirtiness resistance
Technical data:
| LW8-40.5 outdoor high voltage SF6 circuit breaker | |||
| Name | Unit | Value | |
| Rated voltage | kV | 40.5 | |
| Power frequency withstand voltage/1min | Rated insulating level | kV | 95 |
| Thunder impulse withstand voltage(peak value) | 185 | ||
| Rated current | A | 2000 | |
| Mechanical life | times | 3000 | |
| Rated SF6 gas pressure | Mpa | 0.5 | |
| Alarm pressure/minimum power pressure(20°C) | Mpa | 0.45/0.40 | |
| Rated short-circuit breaking current | KA | 40 | |
| Rated short-circuit switching current(peak) | KA | 100 | |
| Rated short time withstand current(thermal stability current) | KA | 40 | |
| Rated short time withstand current(dynamic stability current) | KA | 100 | |
| Rated out of phase breaking curren | KA | 10 | |
| Cumulative breaking times of rated short-circuit breaking current | times | 12 | |
| Rated short-circuit duration time | s | 4 | |
| Switch-off time(on rated voltage) | s | ≤0.15 | |
| Switch-on time(on rated voltage) | s | ≤0.06 | |
| Rated operating sequence | O-0.3s-CO-180s-CO | ||
| Rated switching single capacitor bank current | A | 400 | |
| Annual leakage rate of SF6 | %/year | ≤0.5 | |
| Water content of SF6(V/V) | PPm | ≤150×10-6 | |
| Rated operating voltage matching with CT14 spring operating mechanism | |||
| Switch-on/off coil voltage | V | DC 110 220 | |
| Energy storage motor voltage | V | AC,DC 110 220 | |
| Weight of SF6 gas | kg | 8 | |
| Weight of the circuit breaker | kg | 1400 | |
| Name | Unit | Technical standard | Test condition or means | |
| Dynamic contact stroke | mm | 95±2 | Measurement for dynamic contact stroke | |
| Clearance between contacts | mm | 60±1.5 | Measurement for clearance between dynamic and static arc contacts | |
| Switch-on synchronization between poles | ms | ≤3 | Measurement for clearance between poles of dynamic and static arc contacts | |
| Switch-off synchronization between poles | ms | ≤2 | Measurement for clearance between poles of dynamic and static arc contacts | |
| Main loop resistance | μ Ω | ≤120 | DC voltage fall measurement, power-on when test | |
| Switch-on speed | m/s | 3.2±0.2 | Rated pressure measurement | |
| Switch-off speed | m/s | 3.4±0.2 | Rated pressure measurement | |
| Switch-on cushioning stroke | mm | 10+0.5-1.0 | Switch-on state | |
| Switch-on cushioning orientation distance | mm | 1~2 | Switch-on state | |
| 48.6kV Partial discharge | PC | 20 | Use part measuring instrument, first measure for 1 min in outlet terminal of breaker on 48.6kV, then drop to 28kV and test again. | |
| 28kV Partial discharge | PC | 10 | ||
Outline dimension:
