No. | Item | Unit | Data |
20kA | 25kA | 31.5kA | 40kA |
1 | Rated voltage | kV | 12 |
2 | Maximum working voltage | kV | 12 |
3 | Rated current | A | 630/1250 | 630/1250 | 630/1250/1600 /2000/2500 | 1250/1600 /2000/2500/ 3150/4000 |
4 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 | 40 |
5 | Rated short-circuit closing current | kA | 50 | 63 | 80 | 100 |
6 | Rated peak withstand current | kA | 50 | 63 | 80 | 100 |
7 | 4S rated short-circuit withstand current | kA | 20 | 25 | 31.5 | 40 |
8 | Rated insulation level | 1min power frequency withstand voltage | kV | 42 (phase to phase, to ground)/48 (break) effective value |
Lightning impulse withstand voltage | 75 (phase to phase, to ground)/85 (break) peak value |
9 | Rated operation sequence |
| O-0.3S-CO-180S-CO | ★ |
10 | Mechanical life | Times | 10000 | 10000 |
11 | Rated short-circuit breaking current breaking times | Times | 30 |
12 | Rated closing voltage of operating mechanism | V | AC/DC 110,220 |
13 | Rated opening voltage of operating mechanism | V | AC/DC 110,220 |
14 | Contact opening distance | mm | 11±1 |
15 | Over-travel (compressed length of contact spring) | mm | 3.5±0.5 |
16 | Three-phase opening and closing asynchronism | ms | ≤2 |
17 | Contact closing bounce time | ms | ≤2 | ≤3 |
18 | Average opening speed | m/s | 0.9-1.3 |
19 | Average closing speed | m/s | 0.5-0.8 |
20 | Opening time | At the highest operating voltage | ms | ≤50 |
At the lowest operating voltage | ≤80 |
21 | Closing time | ms | ≤100 |
22 | Main circuit resistance of each phase | μΩ | ≤50 | ≤45 |
23 | Accumulated thickness of allowable wear of moving and static contacts | mm | 3 |