252kV Gas Insulated Switchgear
The 252kV Gas Insulated Switchgear is a high-voltage electrical apparatus for switching, protecting, and isolating electrical equipment in power systems. It utilizes SF6 gas for insulation, offering enhanced reliability, safety, and reduced maintenance.
Technical Specifications
Product Overview
High-Performance 252kV Gas Insulated Switchgear
The ZF11-252(L) GIS is a high-voltage electrical apparatus designed for reliable switching, protection, and isolation in power transmission and distribution systems. Engineered with a compact, gas-tight aluminium alloy enclosure, it integrates essential substation components including circuit breakers, disconnectors, and transformers. The system utilizes SF6 gas insulation to ensure superior dielectric strength, reduced maintenance needs, and enhanced safety for both indoor and outdoor installations.
Key Features
Engineering Highlights
- Automatic silver-coated contact surfaces for high current capacity
- High-strength aluminium alloy enclosure with anti-corrosion properties
- Precision-cast insulators subjected to rigorous X-ray and mechanical testing
- Optimized sealing technology for prolonged endurance and leak prevention
Electrical Ratings
Performance Metrics
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Rated Frequency | 50/60 Hz |
| Rated Peak Withstand Current | 125 kA |
| Power Freq. Withstand (To earth) | 460 kV |
| Power Freq. Withstand (Across isol.) | 530 kV |
| Lightning Impulse Withstand (To earth) | 1050 kV |
| Lightning Impulse Withstand (Across isol.) | 1200 kV |
Gas Management
SF6 Insulation Data
- CB Compartment Pressure: 0.6 MPa
- Other Compartments Pressure: 0.45/0.5 MPa
- Annual SF6 Leakage: <= 0.5%
