Overview
GN27-40.5 indoor isolation switch is a three-phase AC 50Hz high-voltage switchgear used in power systems with a voltage of 40.5kV, for opening and closing circuits under voltage and no-load conditions. Equipped with CS6-2 type operating mechanism or CX6 electric mechanism.
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. The seismic intensity does not exceed 8 degrees;
5. There is no fire, explosion hazard, serious pollution, Places subject to chemical corrosion and severe vibration.
Model and meaning
Technical Data
| Item | Unit | Parameter | |
| GN27-40.5/630-20 | GN27-40.5/1250-31.5 | ||
| Rated voltage | kV | 40.5 | |
| Rated current | A | 630 | 1250 |
| Rated short time withstand current (4s) | kA | 20 | 31.5 |
| Rated peak withstand current | kA | 50 | 80 |
| Rated lightning impulse withstand voltage (peak) | kV | 185/215 | |
| 1min power frequency withstand voltage | 95/115 | ||
Overall and mounting dimensions(mm)
