SN10-10 series 10kV Indoor Less Oil Circuit Breaker is a traditional type medium voltage oil circuit breaker. It takes transformer oil as the arc quenching and insulating medium, with simple mechanical structure, stable breaking performance and high cost performance.
This circuit breaker is mainly designed for 10kV indoor power distribution systems, suitable for frequent closing and opening operation, as well as overload and short-circuit fault protection for transformers, power lines and electrical equipment. It is widely adopted in old substation renovation, industrial plants, mining enterprises and conventional power grid projects.
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 Specifications
- Model: SN10-10
- Rated Voltage: 10kV
- Rated Frequency: 50Hz
- Rated Current: 630A, 1000A, 1250A
- Rated Short-circuit Breaking Current: 16kA, 20kA, 31.5kA
- Installation: Indoor floor / cabinet mounted
- Arc Quenching Medium: Transformer Less Oil
- Operating Mechanism: Electromagnetic type / Spring type
- Ambient Temperature: -20℃ ~ +40℃
- Applicable Altitude: ≤1000m
| 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 |
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