| No. |
Item |
Unit |
Value |
| 1 |
Rated voltage |
kV |
12 |
| 2 |
Rated current |
A |
1250 |
| 3 |
Rated frequency |
Hz |
50 |
| 4 |
Short-time power frequency withstand voltage |
kV |
42 |
| 5 |
Lighting impluse withstand voltage |
kV |
75 |
| 6 |
Rated short-circuit breaking current |
kA |
20 |
| 7 |
Rated withstand current(peak) |
kA |
50 |
| 8 |
Rated short-circuit making current |
kA |
50 |
| 9 |
Rated short-time withstand current |
kA |
20 |
| 10 |
Rated duration of short circuit |
S |
4 |
| 11 |
★Rated breaking current of single capacitor bank |
A |
630 |
| 12 |
★Rated breaking current of back-to-back capacitor bank |
A |
400 |
| 13 |
Rated operating sequence |
O-0.3s-CO-180s-CO |
| 14 |
Breaking operations of rated short-circuit breaking current |
Times |
50 |
| 15 |
Rated mechanical endurance |
Times |
10000 |
| 16 |
Closing force due to bellow and atmosphere |
N |
100±50 |
| 17 |
Force required to hold contacts open at full stroke |
N |
200±50 |
| 18 |
Circuit resistance at lowest rated contact force |
μΩ |
≤25 |
| 19 |
Rated limit erosion |
mm |
3 |
| 20 |
Gas pressure inside vacuum interrupter |
Pa |
≤1×10-3 |
| 21 |
Weight of moving parts |
kg |
1.09 |
| 22 |
Weight of vacuum interrupter |
kg |
3.55 |
| 23 |
Clearance between open contacts |
mm |
11±1 |
| 24 |
Average opening speed |
m/s |
1.1±0.3 |
| 25 |
Average closing speed |
m/s |
0.6±0.2 |
| 26 |
Rated compressive force of contact |
N |
2000±200 |
| 27 |
Contact bouncing duration at closing operation |
ms |
≤2 |
| 28 |
Closing and opening non-simultaneity of three-phase contacts |
ms |
≤2 |
| 29 |
Rebound amplitude of opening contact |
mm |
≤2 |
| 30 |
Note：★Rated characteristics to be given on request |