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Help CenterZN28(A)-12, 12KV Indoor High Voltage Vacuum Circuit Breaker Oil Buffer
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Specifications
ZN28(A)-12, 12KV indoor high voltage vacuum circuit breaker1.High Voltage 12KV
2.High quality
MAIN TECHNICAL DATA | |||||||
1 |
Rated voltage |
kV |
12 |
||||
2 |
Rated short-circuit breaking current |
kA |
20 |
25 |
31.5 |
40 |
|
3 |
Rated current |
A |
630 1250 |
630 1250 |
630 1250,1600 2000 |
1250 2000,3150 4000 |
|
4 |
Rated short-time withstand current (virtual value) |
kA |
20 |
25 |
31.5 |
40 |
|
5 |
Rated peak withstand current (peak) |
kA |
50 |
63 |
80 |
100 |
|
6 |
Rated short-circuit making current (peak) |
kA |
50 |
63 |
80 |
100 |
|
7 |
Rated operations of short-circuit breaking current interruption |
times |
30(40kA 20 times)
|
||||
8 |
Contact erosion limit |
mm |
3 |
||||
9 |
Rated operation sequence |
Opening-0.3s-closing opening-180s-closing opening |
|||||
10 |
Rated contact stroke |
mm |
11±1 |
||||
11 |
Closing duration |
ms |
≤20 |
||||
12 |
Opening duration |
ms |
≤60 |
||||
13 |
Resistance of primary loop |
μΩ |
≤40 |
≤20 |
|||
14 |
Mechanical life |
times |
30000 |
||||
Ambient condition
1 Ambient temperature: max +40°C min -15°C(conveyance under -30°C is allowed)
2 Altitude: ≤1000m
3 Relative humidity: daily average relative humidity: ≤95%; monthly average relative
humidity≤90%, daily average saturated vapor pressure ≤2.2*10-3 MPa,monthly average value ≤1.8*10-3 MPa
4 Earthquake intensity: ≤8 degree
5 The installation should be free from fire, explosion, severe vibration, chemical corrosion and
serious pollution
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