SF6-free MV air-insulated switchgear
Key attributes
| Brand | Schneider |
| Model NO. | SF6-free MV air-insulated switchgear |
| Rated voltage | 7.2kV |
| Rated normal current | 1250A |
| Rated frequency | 50/60Hz |
| Rated short circuit breaking current | 25kA |
| Series | AirSeT |
Product descriptions from the supplier
Product Overview
By integrating sustainable air insulation technology, proven vacuum breaking solutions, and digital connectivity, the SM AirSeT series is an advanced SF6-free medium-voltage switchgear for indoor applications.
Compliance to IEC/UTE standards
Designed and tested to comply with IEC 62271 series, UTE NFC standards, and RoHS/REACH requirements.
ISO 9001 certification
Designed and manufactured in a facility certified by ISO 9001, with Green Premium sustainability certification.
High safety construction
Internal arc protection compliant with IEC 62271-200 Appendix A, supporting up to 20kA 1s withstand capability.
Main Features
SF6-free sustainability - Adopts pure air insulation and Shunt Vacuum Interruption (SVI) technology, GWP=0, no toxic by-products, reducing carbon footprint throughout the lifecycle.
Native digital connectivity - Equipped with built-in sensors for thermal/environmental monitoring, QR code access to Digital Logbook, compatible with EcoStruxure Asset Advisor for predictive maintenance.
Enhanced safety - 3/4-side internal arc protection (IAC: A-FL/A-FLR), voltage presence indicator, and intuitive interlocking, ensuring operator and equipment safety.
Modular flexibility - Harmonized cubicle design with multiple functional units (switching, protection, metering), easy expansion without civil engineering modification.
Long service life - 40-year lifespan supported by CompoDrive operating mechanism and Schneider's self-developed vacuum interrupters, mechanical endurance up to 10,000 operations.
Technical Parameters
| Project | Unit | Data | ||
|---|---|---|---|---|
| Rated voltage | kV | 7.2 | 12/17.5 | 24 |
| Rated current | A | 400-630 | 630-1250 | 630-1250 |
| Rated frequency | Hz | 50/60 | 50/60 | 50/60 |
| Rated insulation level | ||||
| Rated power frequency withstand voltage (1min, effective value) | kV | 20 | 28/38 | 50 |
| Rated lightning impulse withstand voltage (BIL, peak value) | kV | 60 | 75/95 | 125 |
| Rated short circuit breaking current | kA | 12.5/16 | 20 | 25 |
| Rated short time withstand current (1s) | kA | 12.5/16 | 20 | 25 |
| Rated peak withstand current (peak values) | kA | 31.5/40 | 50 | 63 |
| Operating mechanism type | CompoDrive (CDT/CD1/CD2) | CompoDrive (CDT/CD1/CD2) | CompoDrive (CDT/CD1/CD2) | |
| Rated operating sequence | O-0.3s-CO-180s-CO | O-0.3s-CO-180s-CO | O-0.3s-CO-180s-CO | |
| Electrical endurance | level | E2 (IEC 62271-103) | E2 (IEC 62271-103) | E2 (IEC 62271-103) |
| Mechanical endurance | No of times | 10000 | 10000 | 10000 |
| Rated auxiliary control voltage | V | AC220/110, DC24/48/110 | AC220/110, DC24/48/110 | AC220/110, DC24/48/110 |
| Opening time | ms | ≤60 | ≤60 | ≤60 |
| Closing time | ms | 35~70 | 35~70 | 35~70 |
| Enclosure protection level | IP55 | IP55 | IP55 | |
| Internal arc withstand level | A-FL 12.5kA 1s | A-FLR 16kA 1s | A-FLR 20kA 1s | |
Application Scenarios
24kV and below indoor medium voltage secondary distribution systems;
Circuit control and protection of commercial buildings, industrial plants, and utility substations;
Critical facilities such as data centers, hospitals, and airports requiring high reliability;
Sustainable energy projects and smart grid applications with low-carbon requirements.
Dimension (Core Cubicle Type)
| Cubicle Type | Height (mm) | Width (mm) | Depth (mm) | Weight (kg) |
|---|---|---|---|---|
| IM (Switch Unit) | 1600 | 375/500 | 1030/1120 | 137/147 |
| DMVL-A (Circuit Breaker Unit) | 1600 | 750 | 1220 | 407 |
| NSM (Automatic Transfer Unit) | 2050 | 750 | 1030 | 297 |
Insulation Principle:
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In an electric field, the electrons in SF₆ gas molecules are slightly displaced from the nuclei. However, due to the stability of the SF₆ molecular structure, it is difficult for electrons to escape and form free electrons, resulting in high insulation resistance. In GIS (Gas-Insulated Switchgear) equipment, the insulation is achieved by precisely controlling the pressure, purity, and electric field distribution of the SF₆ gas. This ensures a uniform and stable insulating electric field between the high-voltage conductive parts and the grounded enclosure, as well as between different phase conductors.
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Under normal operating voltage, the few free electrons in the gas gain energy from the electric field, but this energy is not sufficient to cause collision ionization of the gas molecules. This ensures the maintenance of the insulating properties.
The core advantages are focused on environmental protection, safety, and full lifecycle costs: firstly, with zero Global Warming Potential (GWP), it completely replaces SF6 gas, which has a greenhouse effect 24300 times that of CO ₂, and has no toxic decomposition by-products; The second is to adopt dry air insulation+vacuum disconnection (SVI) technology, which does not require gas recovery, detection, and replenishment, reducing later operation and maintenance costs; The third is that the insulation medium can be directly discharged into the atmosphere, making the end of life treatment simpler and in line with the requirements of low-carbon projects.
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