Description
VSG -24 series indoor side mounted high voltage vacuum circuit breaker is indoor high voltage switchgear is suitable for three-phase power systems with a rated voltage of 24kV and a rated frequency of 50 Hz as a function of protection and control of electrical appliances, due to the special advantages of vacuum circuit breakers especialy for places requiring frequent operation at rated current or multiple short-circuit currents VSG-24 series side mounted vacuum circuit breaker is fixedly installed and is mainly used for fixed switchgearThe circuit breaker can be used alone or for ring network power supply, box type or various non-standard power supply systems.
APPLYING AMBIENT CONDITIONS
- Ambient temperature: -30°C~+40°C.
- Relative humidity: the average humidity of a day should be no more than95%.The average humidity of a month should be no more than 90%.
- Earthquake intensity: not exceed 8 degrees.
- Saturated vapor pressure: the average pressure of a day should be no more than 2.2kPa; the average pressure of a month should be no more than1.8Kpa.
- The height above sea level: ≤ 1000 m (Except special requirements).
- It should be installed in the places without fire, explosion, serious filth,and chemicalerosion and violent vibration.
| No. |
Item |
Unit |
Data |
| 1 |
Rated voltage |
KV |
24 |
| 2 |
Rated frequency |
HZ |
50/60 |
| 3 |
Rated insulation level |
1 min power frequency withstand voltage |
KV
65 |
| Lightning impulse withstand voltage |
125 |
| 4 |
Rated current |
A |
630
1250 |
| 5 |
Rated short-circuit breaking current |
KA |
20
20 |
| 25 |
| 31.5 |
| 6 |
Rated short circuit closing current(peak) |
KA |
50 |
| 63 |
| 80 |
| 7 |
Contact resistance per phase |
mm |
≤50
≤45 |
| 8 |
Contact opening distance |
mm |
12±1 |
| 9 |
Overtravel |
ms |
3.5±0.5 |
| 10 |
Contact closing bounce time |
ms |
≤2 |
| 11 |
Three phase opening and closing not synchronism |
ms |
≤2 |
| 12 |
Opening time |
ms |
20-50 |
| 13 |
Closing time |
ms |
30-70 |
| 14 |
Average opening time |
m/s |
1.1-1.6 |
| 15 |
Average closing time |
m/s |
0.5-1.0 |
