GSec& GSec Air

High performing medium voltage three-position switch disconnector or disconnector and earthing switch. Bridging Tradition and Innovation with SF6 and SF6-Free Technology.

High performing medium voltage three-position switch disconnector

GSec and GSec Air provide three positions in one structure: LINE – OPEN – EARTH. Both offerings are smart grid ready and highly flexible and suitable for line incoming/outgoing panels, also in combination with circuit breakers or with fuses.

 

GSec

  • SF6 gas insulated
  • Sealed for life in accordance with IEC 62271-1 standard
  • Can be installed in narrow 375 mm panels
  • High number (100 c/o) of breaking operations at rated current 630A value on line contact
  • Tested for use at low temperatures and type-approved for marine applications
  • Modular and flexible design simplifies installation, use, and maintenance

 

GSec Air (SF6-free)

  • SF6 free with dry air as insulation medium
  • Dry air insulation means no dedicated gas mixture and ease of maintenance and service activities
  • GWP of insulation medium is equal to 0 
  • Dedicated vacuum interrupter for reliable,SF6-free breaking capacity
  • Compact tank with limited volume (≤25 liters) 
  • Similar interface, footprint and operations, as the original GSec 

Product scope

  GSec GSec Air
Rated voltage up to 24 kV up to 24 kV 
Rated normal current up to 630 A (load break switch) / 1250 A (disconnector) up to 630 A (load break switch) / 1250 A (disconnector)
Rated short-time withstand current up to 25 kA up to 20 kA (load break switch) / 25 kA (disconnector)

Customer benefits

Standards and compliance

<ul> <li>Compliant with&nbsp;IEC 62271-102,&nbsp;IEC 62271-103,&nbsp;IEC 62271-105&nbsp;standards</li> <li>GSec Air is also compliant with the EU F-gas regulation 2024/573</li> </ul>

Flexible and modular design

<ul> <li>GSec and GSec Air are compact and easy to integrate into existing setups</li> <li>Can combine with fuses and interlock with panel earthing switch</li> <li>Suitable for applications requiring frequent switching</li> <li>Can be easily used in a wide range of configurations</li> </ul>

Safe and reliable

<ul> <li>Sealed for life in accordance with IEC 62271-1 standards</li> <li>When combined with CEF current limiting fuses, the GSec offers a full range of protection</li> <li>Features reliable mechanical position indicator and pressure gauge/density switch&nbsp;</li> </ul>

Related offering

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UniSec Air

Modular air-insulated switchgear for all applications in secondary power distribution up to 24 kV

Outdoor instrument transformers

ABB’s medium voltage outdoor instrument transformers (current and voltage), for IEC and other standards, are ideal for various outdoor applications.

Frequently Asked Questions

GSec Air is an SF₆‑free, indoor medium‑voltage switch disconnector for secondary distribution up to 24 kV. It uses dry air as the insulation medium and a dedicated vacuum interrupter for reliable breaking capacity. It can be efficiently implemented in smart grids and is also suitable for typical applications including line supply, transformer protection, and ring networks.

GSec Air provides three positions in one structure: LINE, OPEN, and EARTH. It can be used as a switch disconnector or as a disconnector with earthing switch and is suitable for incoming and outgoing panels, also in combination with circuit breakers or fuses. 

GSec Air is the SF₆‑free version of the GSec platform. It replaces SF₆ gas with dry air insulation with a global warming potential (GWP) of zero and uses vacuum interrupters for breaking capacity. 

Yes. GSec Air complies with IEC 62271‑102, IEC 62271‑103, and IEC 62271‑105 standards, and with the EU F‑gas regulation (EU) 2024/573, which restricts the use of SF₆ in medium‑voltage equipment. Its SF₆‑free design supports regulatory compliance and sustainability objectives to comply with latest PFAS (per- and polyfluoroalkyl substances) environmental regulations.

GSec Air features a compact sealed‑for‑life tank with limited volume (≤25 liters), dry air insulation that simplifies service activities, and mechanical position indicators for clear status visibility. It maintains the same interface and operation as GSec, reducing training needs and the risk of misuse. Further, channel partners can leverage  streamlined operations with fewer components and simplified inventory with fewer spare variants.

Yes. GSec Air is designed with a similar footprint, interface, compact size and operations as the existing GSec, making it easier to integrate in new panels interchangeable with existing set-ups.  Further, GSec Air has same configurations as the existing GSec.