Project Background

As the backbone network of urban public transportation in Nanning, the rail transit system places extremely high demands on the reliability, safety, and compactness of its power supply system. Leveraging years of practical experience in the rail transit power distribution sector, SIWU Electric Group Co., Ltd. supplied core power distribution equipment – AC 40.5kV Gas Insulated Metal Enclosed Switchgear (C-GIS) – for Nanning Rail Transit Lines 2 to 5, aiding in the construction of an efficient and stable traction power supply system for the Nanning Metro.

Product Applied: AC 40.5kV Gas Insulated Metal Enclosed Switchgear (C-GIS)

Customer Pain Points

Stringent Space Constraints: Limited space in metro substations makes layout difficult with traditional, larger switchgear.

High Reliability Requirements: The traction power supply system requires long-term, high-load operation, demanding extremely high equipment sealing, insulation, and stability.

High Maintenance Complexity: Traditional equipment involves cumbersome inspection and repair processes, leading to high operational maintenance costs. There is a need to reduce failure rates and maintenance frequency.

Localization Production Needs: The high-end electrical equipment manufacturing industry chain in the Guangxi region needs development, requiring the promotion of key technology localization.

Proposed Solution

Addressing the specific needs of the Nanning Rail Transit project, SIWU Electric introduced the AC 40.5kV C-GIS Gas Insulated Metal Enclosed Switchgear, featuring the following technical characteristics:

Compact Design: Utilizes an integrated dual-gas chamber structure and laser double-sided welding technology. This ensures a cable compartment operational space height of 800mm while controlling the total equipment height at 2400mm, perfectly adapting to the confined spaces of metro systems.

High Sealing Reliability: Applies multiple sealing ring technologies and processes, significantly enhancing gas chamber sealing and ensuring long-term operational stability.

Intelligent Monitoring Functions: Equipped with electronic density sensors, reducing intermediate connection points, and enabling real-time status monitoring and fault early warning.

Localized Production Support: SIWU Electric achieves localized production of core equipment in Guangxi, shortening the supply chain cycle and improving service response speed.

Customer Value

Space Optimization: The highly compact equipment effectively saves substation space and reduces civil engineering costs.

Reliable Operation: Stainless steel gas chambers and multiple sealing designs ensure long-term stable equipment operation in humid, high-load environments.

Convenient Operation & Maintenance: Electronic sensors and modular structures simplify maintenance procedures, reducing downtime and O&M costs.

Industrial Synergy: Promotes the development of the high-end electrical equipment manufacturing industry chain in Guangxi, achieving regional technological upgrades and economic benefits.