Overview
N22-40.5/31.5 indoor grounding switch is suitable for three-phase power system with rated voltage of 40.5kV and AC 50Hz. It can be used with KYN61-40.5 high-voltage switchgear and other types of high-voltage switchgear as grounding protection during maintenance of high-voltage electrical equipment.
Operating Conditions
1. Altitude: ≤ 1000 meters;
2. The environment temperature: upper limit +40℃, lower limit -25℃;
3. Relative humidity: daily average value is not greater than 95%, monthly average is not greater than 90%;
4. Earthquake intensity: ≤8degree;
5. Class of pollution: II
Model and meaning
Technical Data
| Item | Unit | Parameter | |
| Rated voltage | kV | 40.5 | |
| Rated short time withstand current | kA | 31.5 | |
| Rated short circuit withstand time | s | 4 | |
| Rated short circuit making current | kA | 80 | |
| Rated peak withstand current | kA | 80 | |
| Rated insulation level | 1min power frequency withstand voltage | kV | 95 |
| Lightning impulse withstand voltage | 185 | ||
| Central distance between poles | mm | 300/350/400 | |
Overall and mounting dimensions(mm)
