Gas Insulated Switchgear for High Voltage Systems
Gas Insulated Switchgear (GIS) is a 3-phase AC high voltage switchgear used for control and switching of transmission lines. It integrates key substation equipment such as circuit breakers, disconnectors, and transformers into a single closure.
Technical Specifications
Product Overview
High-Performance Gas Insulated Switchgear
This Gas Insulated Switchgear (GIS) system is engineered for high-voltage power transmission and distribution with a focus on reliability and minimal maintenance. Featuring a durable, corrosion-resistant aluminum alloy enclosure, it provides exceptional insulating performance while maintaining a compact footprint suitable for diverse indoor and outdoor environments. With advanced double-sealing technology, the unit ensures superior gas tightness and an annual leakage rate of less than 0.5%.
Key Features
Main Advantages
- Oil and gas-free mechanism for simplified maintenance
- Lightweight aluminum alloy enclosure with anti-corrosion properties
- Advanced double sealing for high gas tightness reliability
- Excellent current-carrying and insulation performance
Technical Specifications
Performance Ratings
145 kV
Max Rated Voltage
3,150 A
Max Rated Current
40 kA
Short-time Withstand Current
0.5 %
Annual Gas Leakage Rate
Comprehensive Ratings Table
| Parameter | 72.5 kV | 126 kV | 145 kV |
|---|---|---|---|
| Rated Current (A) | 2000/3150 | 2000/3150 | 2000/3150 |
| Rated Short-time Current (kA) | 40 | 40 | 40 |
| Power Freq. Withstand (To earth, kV) | 140 | 230 | 275 |
| Lightning Impulse Withstand (To earth, kV) | 325 | 550 | 650 |
Operational Parameters
- SF6 Gas Pressure (at 20°C)
- 0.5 MPa (CB compartment), 0.4 MPa (Other compartments)
- Rated Frequency
- 50/60 Hz
