ZW7-40.5 Vacuum Circuit Breaker
General ZW7-40.5 Series outdoor high voltage vacuum circuit breaker is rated voltage 40.5kV, three phase AC 50Hz outdoor distribution equipment. Mainly used for breaking, closing power system load current, overload current and short-circuit current. Applicable to substations and power distribution in industrial and mining enterprises for protection and control purposes, and frequent operation place for rural power grids.
Outdoor Vacuum Circuit Breaker Service environment conditions
a) Ambient Air Temperature: +45ºC ~ -45ºC
b) Humidity: Monthly average humidity 95%; Daily average humidity 90%.
c) Altitude above sea level (Maximum installation altitude): not more than 2500 meters.
d) Ambient air should be not apparently polluted by corrosive and flammable gas, vapor etc.
e) The wind speed is not greater than 35m/s.
f ) Anti-contamination level for grade IV
g) The earthquake intensity does not exceed 8 degrees.
| No. | Item | Unit | Parameters |
| 1 | Rated voltage | KV | 40.5 |
| 2 | Rated frequency | Hz | 50/60 |
| 3 | Rated current | A | 630/1250 |
| 4 | Rated short-circuit breaking current | kA | 31.5 |
| 5 | Rated peak value withstand current(peak) | kA | 50/63 |
| 6 | Rated short time withstand current | kA | 20/25 |
| 7 | Rated short-circuit closing current (peak) | kA | 50/63 |
| 8 | Mechanical life | Times | 10000 |
| 9 | Rated short-circuit breaking current breaking number | Times | 30 |
| 10 | Power frequency withstand voltages (1 min), wet/dry: inter-phase, earth, fracture | KV | 80/95 |
| 11 | Lightning impulse withstand voltage (peak) inter-phase ,earth, fracture | KV | 185 |
| 12 | Rated operate sequence | O-0.3-CO-180S-CO | |
| 13 | Secondary circuit 1min power frequency voltages | KV | 2 |
Overall dimension
