| Brand | ROCKWILL |
| Model NO. | High reliable MV SF6-free air-insulated switchgear |
| Rated voltage | 24kV |
| Rated normal current | 1250A |
| Rated frequency | 50/60Hz |
| Rated short circuit breaking current | 25kA |
| Series | AirSeT |
By integrating sustainable air insulation technology, proven vacuum breaking solutions, and digital connectivity, the SM AirSeT series is an advanced MV SF6-free air-insulated 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.
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.
| 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 | |
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.
| 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 |
The insulating property of SF₆ gas relies on its stable molecular structure, which makes electron escape and collision ionization difficult under normal operating voltages, ensuring high insulation resistance. In GIS, insulation is precisely maintained by controlling gas pressure, purity, and electric field distribution to guarantee a uniform and stable electric field between high-voltage conductors and the grounded enclosure.
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.
The SM AirSeT series utilizes a combination of pure air insulation and Shunt Vacuum Interruption (SVI) technology. This allows the system to maintain a Global Warming Potential (GWP) of zero and eliminates toxic by-products, making it a truly sustainable alternative for medium-voltage distribution.
Q：How does this MV SF6-free air-insulated switchgear support smart grid digitalization？
A:This switchgear is designed with native digital connectivity. It features built-in sensors for real-time thermal and environmental monitoring and provides QR code access to a Digital Logbook. It is fully compatible with advanced platforms like EcoStruxure Asset Advisor to enable predictive maintenance and data-driven insights.
Q：What are the safety ratings for the MV SF6-free air-insulated switchgear？
A:Safety is a core feature, with internal arc protection compliant with IEC 62271-200 Appendix A. Depending on the configuration, it supports an internal arc withstand level of up to 20kA for 1 second (A-FLR). It also includes intuitive interlocking systems and voltage presence indicators to protect operators during use.
Q：What is the expected lifespan and durability of the MV SF6-free air-insulated switchgear？
A:The series is engineered for a 40-year service life. It utilizes the robust CompoDrive operating mechanism and specialized vacuum interrupters, achieving a mechanical endurance of up to 10,000 operations. This long-term reliability makes it ideal for critical facilities like data centers, hospitals, and airports.
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