| Number |
Name |
Unit |
Parameter |
| 20kA |
25kA |
31.5kA |
40kA |
| 1 |
Rated voltage |
kV |
12 |
| 2 |
Rated current |
A |
630,100,1250 |
1250,1600 |
1250,1600,2000,2500 |
1600,2500,3150 |
| 3 |
Rated short-circuit switch-off current |
kA |
20 |
25 |
31.5 |
40 |
| 4 |
Rated short-circuit controlly current(peak) |
kA |
50 |
63 |
80 |
100 |
| 5 |
Rated peak withstand current |
kA |
50 |
63 |
80 |
100 |
| 6 |
4s rated short-time withstand current |
kA |
20 |
25 |
31.5 |
40 |
| 7 |
Rated insulating level |
Power frequency withstand voltage(before and after rated switch-off) |
kV |
42（断口48） |
| Impulse resisting voltage(before and after rated switch-off) |
75（断口84） |
| 8 |
Rated operating order |
|
分-0.5S-合分-180 S-合分 |
| 9 |
Mechanical life |
次 |
10000 |
| 10 |
Breaking times of rated short-circuit switch-off current |
次 |
30 |
20 |
| 11 |
Operating mechanism rated witch-on voltage(DC) |
V |
110,220 |
220 |
| 12 |
Operating mechanism rated witch-on current(DC) |
A |
71 |
128 |
| 13 |
Operating mechanism rated witch-off voltage(DC) |
V |
110,220 |
| 14 |
Operating mechanism rated witch-off current(DC) |
A |
3.0,1.5 |
| 15 |
Contact distance |
mm |
11±1 |
| 16 |
Ultra travel(length of contact spring compressing) |
mm |
4±1 |
| 17 |
Three-phase switch on-and-off not the same period |
ms |
≤2 |
| 18 |
Contact switch-on jump time |
ms |
≤2 |
| 19 |
Average switch-off speed (without oil cushioning) |
m/s |
1.2±0.3 |
| 20 |
Average switch-on speed |
m/s |
0.6±0.2 |
| 21 |
Switch-off time |
Under Max. operating voltage |
s |
≤0.06 |
| Under Min. operating voltage |
≤0.08 |
| 22 |
Switch-on time |
s |
≤0.2 |
| 23 |
Each phase main return circuit resistance |
μΩ |
≤40 |
≤20 |
| 24 |
Automatic striking and grinding cumulative thickness |
mm |
3 |
| 25 |
Oil cushioning buffer travel |
mm |
10 |
