40.5kV Vacuum Circuit Breakers VCB
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40.5kV Vacuum Circuit Breakers VCB
VCR1 indoor high-voltage AC vacuum circuit breaker has a frequency of 50Hz and a rated voltage of 40.5kV. It applies to the electrical equipment control and protection in industrial and mining enterprises, power plants and substations, particularly to the places needing frequent operation. It can be fixed in a switch cabinet or installed on handcart. With stable performance and convenient installation, it is the best choice for the control and protection of high voltage power transmission and distribution systems.
Normal operating conditions
● Ambient temperature: - 40℃~+40℃ (below 35°C within 24 hours)
● Relative humidity: ≤95% (daily average) or ≤90% (monthly average)
● Altitude: ≤ 1000m
Technical Parameters
| Item | Unit | Reference value |
| Standards |
|
IEC 62271-100 |
| Rated voltage | kV | 40.5 |
| Rated insulation level: Lightning impulse withstand voltage | kV | 185 |
| Rated insulation level: 1 min power-frequencywithstand voltage | kV | 95 |
| Rated frequency | Hz | 50/60 |
| Rated current | A | 630/1250/1600/2000/2500 |
| Rated short-circuit breaking current | kA | 20/25/31.5 |
| Rated short-circuit making current(peak value) | kA | 50,63,80 |
| Rated short-time withstand current | kA | 20/25/31.5 |
| Rated withstand current(peak value) | kA | 50,63,80 |
| Required operation sequence | O-0.3s-CO-180s-CO | |
| Rated short-circuit duration | S | 4 |
| Times of making-breaking with the rated short-circuit current | Times | 30 |
| Mechanical life | M2 level | |
| Weight | kg | 320 |
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