01 Space Saving
Compact Integrated Design
Requires only 30%–50% of the space used by traditional separated equipment.
View Fenarro AIS and GIS switchgear comparison by insulation medium, cost, footprint, maintenance, repair time, and project application to choose a suitable solution for your substation project.
A practical choice for 40.5kV substations requiring accessible maintenance, flexible layout, and lower initial investment.
A compact sealed solution for projects with very limited space, harsh environments, or higher enclosure requirements.
The following technical comparison helps project owners, contractors, and engineers understand the main differences between AIS and GIS when planning medium-voltage substation equipment.
Uses air as the main external insulation medium between energized components.
Uses SF6 gas insulation inside a sealed enclosure or gas chamber.
Usually offers a lower initial investment, especially for outdoor substations or projects where land is available.
Usually requires a higher initial cost because of its sealed gas-insulated structure and specialized manufacturing process.
Requires more space than GIS, but Fenarro ZCW10-40.5 AIS uses a compact combined structure to reduce land occupation compared with traditional separated equipment.
Very compact and suitable for underground substations, high-rise basement substations, tunnels, and other space-constrained projects.
Components are more accessible for visual inspection, routine maintenance, and part replacement.
The sealed structure reduces internal exposure, but gas handling and module service usually require specialized maintenance support.
Accessible components make inspection and replacement easier, helping shorten repair work in many site conditions.
Repair may take longer because the sealed gas chamber and internal modules require specialized inspection and handling.
Your project needs 40.5kV substation control and protection, easier maintenance access, lower investment pressure, and flexible installation planning.
Your project requires maximum space saving, sealed insulation, or better isolation from humidity, dust, pests, underground conditions, or marine environments.
