Intelligent Gas Insulated Metal Closed Ring Switchgear

GIS equipment has been widely operated all over the world since its practicalization in the 1960's. GIS is widely used not only in the field of high voltage and ultra-high voltage, but also in the field of extra-high voltage. Compared with conventional open substations, GIS has the advantages of compact structure, small footprint, high reliability, flexible configuration, easy installation, high safety, strong environmental adaptability, and very small maintenance workload, with maintenance intervals of not less than 20 years for its main components.

1. Small Footprint: GIS equipment encloses all live parts within a metal housing, significantly reducing the required space. For example, a 220kV GIS occupies only about 15% of the area of a conventional substation of the same capacity.

2. High Operational Reliability and Safety: The insulating performance of GIS equipment is unaffected by atmospheric conditions, and its strong seismic resistance enhances operational reliability. Additionally, since all live components are enclosed in metal, it prevents environmental contamination by high voltage and protects personnel from electric shock.

3. Long Maintenance Cycle: GIS equipment requires maintenance less frequently, typically only needing disassembly and overhaul every 10 to 20 years, which helps reduce maintenance costs and downtime.

4. Strong Environmental Adaptability: Designed in accordance with IEC international standards, GIS equipment is suitable for various environmental conditions, including low-temperature environments.

5. Compact Structure: GIS components are arranged compactly, with a minimum spacing of just 2 meters, enabling further space savings.

6. Intelligent Monitoring and Diagnostic Functions: Equipped with electronic devices, sensors, and actuators, advanced GIS equipment not only performs the core functions of switchgear but also offers enhanced capabilities in monitoring and diagnostics.

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