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| S.N | Name | Unit | Data | ||||||
| 1 | Rated voltage | kV | 24 | ||||||
| 2 |
Rated insulation level | Rated power frequency withstand voltage 1min | kV | 65 | |||||
| Rated lightning impulse withstand voltage | kV | 125 | |||||||
| 3 | Rated current | A | 630 | 1250 | 1600 | 2000 | 2500 | 3150 | |
| 4 | Rated frequency | Hz | 50 | ||||||
| 5 | Rated short breaking current Rated short time withstand current |
kA | 20 | 25 | 31.5 | ||||
| 6 | Rated short circuit making current(peak) Rated peak withstand current |
kA | 50 | 63 | 80 | ||||
| 7 | Rated short-circuit duration | s | 4 | ||||||
| 8 | Clearance between open contacts | mm | 13±1 | ||||||
| 9 | Overtravel | mm | 3.5±0.5 | ||||||
| 10 | Contact bouncing duration at closing opening | ms | ≤2/≤3(2000-31.5 and above) | ||||||
| 11 | Out of simultaneity of CO operation of three poles | ms | ≤2 | ||||||
| 12 | Opening time | ms | 20~50 | ||||||
| 13 | Closing time | ms | 30~70 | ||||||
| 14 | Average opening speed | m/s | 1.1~1.6 | ||||||
| 15 | Average closing speed | m/s | 0.5~1.0 | ||||||
| 16 | Rated operating sequence | O-0.3s-CO-180s-CO | |||||||
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