| Item | Description | Unit | Data | |||
| 1 | Rated voltage | KV | 12 | |||
| 2 | 1min Power frequency withstand voltage | 42 | ||||
| 3 | Lightning impulse withstand voltage(peak) | 75 | ||||
| 4 | Rated frequency | Hz | 50 | |||
| 5 | Rated current | A | 630 1250 | 630 1600 2500 | 1250 2000 3150 | |
| 6 | Rated short circuit breaking current | KA | 20 | 25 | 31.5 | 40 |
| 7 | Rated short circuit withstand current | 20 | 25 | 31.5 | 40 | |
| 8 | Duration of rated short circuit current | S | 4 | |||
| 9 | Rated peak withstand current | KA | 50 | 63 | 80 | 100 |
| 10 | Rated short circuit making current | 50 | 63 | 80 | 100 | |
| 11 | 1min Power frequency withstand voltage on secondary circuit | V | 2000 | |||
| 12 | Rated single/back capacitor bank breaking current | A | 630/400(40KA:800/400) | |||
| 13 | Rated capacitor bank making current | KA | 12.5 | |||
| 14 | Opening time | ms | ≤50 | |||
| 15 | Closing time | ≤70 | ||||
| 16 | Mechanical life | time | 30000 | |||
| 17 | Nos of breaking rated current | 30000 | ||||
| 18 | Nos of breaking rated short circuit breaking current | 50 | ||||
| 19 | Permissible abraded thickness of moving, static contacts | mm | 3 | |||
| 20 | Opening distance of contact | 9±1(1600A:11±1) | ||||
| 21 | Over travelling distance contact | 3.5±0.5 | ||||
| 22 | Jumping time of contact at closing | ms | ≤2(40KA≤3) | |||
| 23 | Asynchrony of three phase opening, closing | ≤2 | ||||
| 24 | Average opening speed | m/s | 0.9～1.2 | |||
| 25 | Average closing speed | 0.5～0.8 | ||||
| 26 | Rebound height of contact opening | mm | 0 | |||
| 27 | Ressistance of main circuit | μΩ | ≤40(Below1250A) | |||
| ≤35(1600～2000A)≤25(Over2500) | ||||||
| 28 | Contacting pressure at closing contact | N | 2000±200(20KA)2400±200(25KA) | |||
| 3100±200(31.5KA)4300±200(40KA) | ||||||
| 29 | Rated operating sequence | off-0.3S-on/off-180s-on/off | ||||