SN10-10 Series type indoor high voltage Less Oil circuit breaker is rated voltage 12kV, three-phase AC 50Hz Indoor high-voltage switchgear.
Working Conditons
Ambient temperature: not higher than +40 °C, not less than -15°C
Altitude: not exceed 1000m.
Relative humidity: daily average of not more than 95%, month average of not more than 90%.
Earthquake intensity: not more than ten.
No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.
Technical Specification
| NO | Item | Units | parameters |
| 1 | Rated voltage | KV | 12 |
| 2 | Rated Frequency | HZ | 50 |
| 3 | Rated Current | A | 630. 1250 1600 2000 3150 |
| 4 | Rated short-circuit breaking current | KA | 20 25 31.5 |
| 5 | Rated short-circuit closing current (peak) | KA | 50 63 80 |
| 6 | Rated short-circuit duration | S | 4 |
| 7 | Rated short-circuit breaking current breaking number | nos | 50s |
| 8 | Rated operating sequence | 0-0.3s-CO-180s-CO | |
| 9 | Rated lightning impulse withstandvoltage | kv | 125 |
| 10 | 1min power frequency withstand voltage | KV | 65 |
| 11 | Closing time | ms | ≤ 70 |
| 12 | opening time | ms | ≤ 50 |
| 13 | Mechanical life | Times | 20000 |
| 14 | Rated Storage and operation voltage | V | AC DC 220/110 |
| 15 | Breaking life | ms | ≤ 80 |
| 16 | Storage life | s | ≤ 10 |
Adjust the parameters of mechanical properties:
| No | Item | Unit | Parameters |
| 1 | Contact distance | mm | 14±1 |
| 2 | Contact Over-travel | mm | 3.5±1 |
| 3 | Closing speed | m/s | 1.0±0.2 |
| 4 | Opening speed | m/s | 1.3±0.2 |
| 5 | Contact closing spring time | ms | ≤2 |
| 6 | Rated contact pressure | N | 20KA(2400±200) 25KA (2400±200) 31.5KA(3100±200) |
| 7 | Three phase closing opening asynchrony | ms | ≤2 |
