1.General
ZFC-24 Series outdoor high voltage vacuum circuit breaker is rated voltage 24kV, three phase AC 50Hz outdoor distribution equipment .mainly used to 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 .
The circuit breaker Small size, light weight, anti-condensation, maintenance and so on. Adapt to adverse weather conditions, and to teach filthy environment.
2. Service environment
a) Air temperature: Maximum temperature: +85℃; Minimum temperature:-45℃
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude:2500mor more higher.
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
3. Mainly Technical parameters
No. | Item | Unit | Parameters |
1 | rated voltage | kV | 24 |
2 | rated frequency | Hz | 50 |
3 | rated current | A | 630/1250 |
4 | rated short-circuit breaking current | kA | 20/25 |
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(wet) (dry) inter-phase ,earth, fracture | kV | 65/79 |
11 | Lightning impulse withstand voltage (peak) inter-phase ,earth, fracture | kV | 125/145 |
12 | Secondary circuit 1min power frequency voltages | kV | 2 |
