Schneider SM AirSet MV Switchgear

SM AirSeT is a modular, SF6-free, air-insulated medium-voltage switchgear range from Schneider Electric, engineered for secondary distribution in commercial, industrial and utility networks up to 24 kV. This article explains the range’s core interruption technology, environmental and digital differentiators, selection criteria, and the standards framework buyers should verify before specifying it on a project. It is written for procurement engineers and EPC contractors sourcing medium-voltage switchgear across the Middle East and Gulf region (including Egypt and Saudi Arabia), North Africa, the CIS states, and Sub-Saharan Africa, where SF6-alternative and digitally connected switchgear is increasingly requested in tender specifications.

What Is SM AirSeT and How Does It Work?

SM AirSeT replaces sulfur hexafluoride (SF6) gas — traditionally used for dielectric insulation in compact MV switchgear — with a combination of pure air insulation and vacuum arc interruption. Schneider Electric brands this arrangement Shunt Vacuum Interruption (SVI)™, in which the load-break switch sits inside a sealed tank filled with air, and a vacuum bottle housed within the same assembly performs the actual current-breaking function. This design avoids the use of SF6 or any alternative insulating gas, and it produces no toxic by-products during breaking operations, since the switching medium is simply air that can be released to atmosphere at end of life rather than recovered or recycled.

The motivation for this shift is straightforward from an environmental standpoint: SF6 has a Global Warming Potential 24,300 times higher than CO2 , which is why regulators worldwide are progressively tightening restrictions on its use in electrical equipment. SM AirSeT is positioned as a drop-in-compatible alternative that preserves the compact footprint, the familiar 3-position switch operation, and switch-fuse-based transformer protection that installers already expect from earlier SF6 switchgear generations — meaning adoption does not require re-training or civil-works changes on retrofit projects.

Range Architecture and Functional Building Blocks

SM AirSeT is built as a modular functional-unit range, allowing panels to be configured for incoming, outgoing, ring, and transformer-protection duties within the same switchboard. Core functional characteristics include:

• 3-position switch (open / closed / earthed) for clear, visually verifiable switching states.
• Switch-fuse combination units for direct transformer protection without a separate circuit breaker panel.
• CompoDrive mechanism — a high-tech operating mechanism designed to extend mechanical endurance over the equipment’s service life.
• Plug-and-play motorization that can be added on-site without redesigning the panel.
• Footprint parity with prior-generation SF6 switchgear, so supplementary functional units can be added later without adaptation of existing civil works.

Because of these design choices, Schneider Electric states the range achieves an extended lifespan of 40 years , attributing this durability to the combination of SVI interruption technology and the CompoDrive mechanism.

Digital Connectivity: Three Tiers of Monitoring

A defining feature of SM AirSeT is that it is “digitally connected by default.” Every unit carries a QR code linking to a digital environment that includes a Digital Logbook for storing and sharing project data from design through end of life. Beyond this baseline, Schneider Electric offers the range in three connectivity tiers — SM AirSeT, SM AirSeT Active, and SM AirSeT Active Plus — which scale from basic edge/cloud connectivity up to optional partial discharge monitoring, arc fault detection, environmental monitoring, and remote terminal unit integration.

Key embedded sensor technologies referenced for these tiers include TH110 (thermal), CL110, LPVT and LPCT (low-power voltage/current transducers), and VIP (voltage indication/protection) sensors, alongside optical arc-detection sensors for fast internal arc clearance. These sensors support condition-based maintenance strategies, reducing the need for routine physical site visits, and feed into Schneider Electric’s EcoStruxure architecture for edge control, EcoStruxure Power SCADA, and EcoStruxure Asset Advisor services.

Nearby and Remote Operation

SM AirSeT supports operating and monitoring the switchgear from a smart device or local HMI, allowing personnel to carry out switching and status checks from a safer distance without direct physical interaction with the panel — a capability referenced against the NFPA70E safe-distance standard for electrical safety work practices.

Comparative Specification Table

No rated short-circuit breaking current, rated normal current, or frequency figures were disclosed in the reviewed catalog excerpt; buyers should request the full technical datasheet for these panel-specific ampacity and fault-current ratings before finalizing a specification.

Selection Criteria for Buyers

When evaluating SM AirSeT against conventional SF6 or SF6-alternative-gas switchgear, procurement teams should weigh:

1. Regulatory exposure to F-gas restrictions. Since SF6 carries a documented GWP many thousand times that of CO2, jurisdictions tightening F-gas rules make an air/vacuum solution a lower long-term compliance risk.
2. Retrofit compatibility. SM AirSeT is designed with the same footprint as earlier SF6 switchgear generations, which matters for brownfield substation upgrades where civil works cannot be modified.
3. Digital service tier required. Buyers should decide upfront whether baseline connectivity, Active-tier condition monitoring, or Active Plus (with partial discharge and full environmental monitoring) is needed, since this affects sensor bill-of-materials and lifecycle service contract options.
4. End-of-life handling. Because pure air requires no recovery or recycling process, decommissioning logistics and associated costs are simplified compared with gas-insulated equivalents.
5. Service and lifecycle contract fit. Schneider Electric’s EcoCare, EcoFit, and Life Extension programs (Essential/Advanced) offer different combinations of lifetime extension, waste reduction, and failure-rate improvement — worth comparing against total cost of ownership models used by the buyer’s engineering department.
6. Sustainability reporting needs. Projects targeting LEED™ credits (Building Product Disclosure and Optimization, Advanced Energy Metering) benefit directly from SM AirSeT’s environmental data transparency program.

Typical Applications

SM AirSeT is positioned for MV secondary distribution switchboards in:

• Commercial buildings and campuses requiring compact, indoor ring main unit-style functional units.
• Industrial facilities needing transformer protection via switch-fuse combination panels.
• Utility secondary substations where SF6 phase-out policies are already influencing procurement specifications.
• Retrofit projects replacing aging SF6 switchgear without redesigning the substation civil structure.
• Projects pursuing green-building certification where equipment-level environmental data and reduced end-of-life gas handling are valued.

Standards and Compliance Note

SM AirSeT is positioned within the metal-enclosed AC switchgear category typically governed by IEC 62271-200, the international standard applicable to AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV, which frames type-testing and rated-characteristic requirements for this class of MV equipment. Safe operating-distance practices referenced for remote/nearby control features are aligned with the NFPA70E standard for electrical safety in the workplace. Buyers should always request project-specific type-test certificates and the applicable national grid code annexes alongside the standard reference.

Related guides

See also our guides on medium voltage switchgear, metal-clad switchgear and MV protection relays.