Summary
KGH1-40.5 Fixed AC Metal-clad Switchgear is designed and developed on XGN17 switchgear. It conforms with GB3906, GB/T 11022, DL/T 593 and other standards and relevant requirements of this kind of product.
Ambient condition
- Environmental air temperature：upper limit is +40℃ , the mean value in 24h is no more than 35 ℃ , lower limit is -25℃;
- Altitude ≤ 1000m;
- Relative humidity: daily average value ≤ 95%, monthly average value ≤ 90%；
- Vapor pressure: daily mean relative humidity ≤2.2kPa, monthly mean relative humidity≤1.8kPa；
- Earthquake intensity: not exceeding 8 degree；
- Installation site: without fire risk, explosion hazard, heavy pollution, chemical corrosion and violent vibration
Model
Technical specification
| No. | Item | Unit | Technical parameters | |
| 1 | Rated voltage | kV | 40.5 | |
| 2 | Rated current | A | 630 ，1250 ，2000 ，2500 | |
| 3 | Rated frequency | Hz | 50 | |
| 4 | Rated peak withstand current | kA | 50 ，63 ，80 | |
| 5 | Rated short-time withstand current | 20 ，25 ，31.5 | ||
| 6 | Duration of rated short-circuit withstand current | s | 4 | |
| 7 | Rated short circuit breaking current | kA | 20 ，25 ，31.5 | |
| 8 | Rated short circuit making current | 50 ，63 ，80 | ||
| 9 | Ratedinsulation level | 1min P.F. Withstand Voltage | kV | Phase to phase, phase to ground/ isolating fracture：95/118 |
| Lightning impulse withstandvoltage | Phase to phase, phase to ground/ isolating fracture：185/215 | |||
| 10 | Voltage of auxiliarycontrol loop | 1min P.F. Withstand Voltage | DC220/110, AC220/110 | |
| Lightning impulse withstandvoltage | 2000 | |||
| 11 | Outline dimension（W×D×H） | 1818×3200×3200 | ||
| 12 | Rated operation sequence | O-0.3s-CO-180s-CO | ||
| 13 | Loss category for running continuity | LSC2B | ||
Main Structure
1. It adopts integrated solid structure design, and the product has beautiful appearance;
2. The product is completely formed by Al-Zn coated steel plate after multiple bending processed, It has the characteristics of high precision, strong rigidity and good corrosion resistance;
3. Equipped with ZN12-40.5 vacuum circuit breaker that has reliable performance;
4. The normal operation of the switchgear, including opening and closing of breaker switch and the upper and lower disconnector, can be carried out under the closing condition of the high voltage compartment door is open;
5. Conventional relay protection or integrated microprocessor-based protection device can be configured. Wall bushing used for internal pressure outside the shielding structure, avoid discharge local high field, effective suppression of solid insulation thermal breakdown and electrochemical breakdown in AC battery under the action, so as to improve the life of insulation, anti aging effect.
Basic Structure
A.LV instrument compartment B. CB compartment
C. Busbar compartment D. Cable compartment
1. Releasing plate of the CB compartment 2. The upper disconnector 3.Bushing
4. Branch busbar assembly 5. Releasing plate of the Busbar compartment
6. Releasing plate of the Cable compartment 7. Insulator 8. Power cable
9. Earthingt busbar assembly 10. Cable clamp 11. The tower sealing ring
12. The lower disconnector 13. Actuating linkage 14.Current transformer
15. Vacuum circuit breaker 16.Operation mechanism