GSec & GSec Air

Bridging Tradition and Innovation with SF6 and SF6-Free Technology

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High performing medium voltage three-position disconnector and earthing switch

GSec is a medium voltage indoor sulfur hexafluoride (SF6)-insulated switch for secondary distribution up to 24kV. It is suitable for applications that require frequent switching and is available in a wide range of configurations. GSec is sealed for life in accordance with IEC standard 62271-1.

GSec Air is SF6-free and has dry air as the insulation medium. It has a global warming potential (GWP) of zero and is fully compliant with the EU F-gas regulation 2024/573.

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 ingoing/outgoing panels, 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 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 
  • Higher rated protection fuses optimize transformer feeders and reduce overall plant costs


Product scope

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 GSecGSec Air1
Rated voltageup to 24kVup to 24kV 
Rated normal currentup to 630 A (load break switch) / 1250 A (disconnector)up to 630 A (load break switch) / 1250 A (disconnector)
Rated short-time withstand currentup to 25kA up to 20 kA (load break switch) / 25 kA (disconnector)

1 GSec Air will be available for commercial sales around mid 2025. The first version will have a rated current up to 630 A / 20 kA.

Customer benefits

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Standards and compliance

  • Compliant with IEC 62271-103 (MV switches) and IEC 62271-105 (MV switch-fuse combination) standards

 

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Flexible and modular design

  • GSec is compact and easy to integrate into existing setups
  • Single-spring and double spring actuator
  • Can combine with fuses and interlock with panel earthing switch
  • Suitable for applications requiring frequent switching
  • Can be easily used in a wide range of configurations

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Safe and reliable

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

FAQ

How to choose between GSec and GSec Air?

The primary difference between GSec and GSec Air is the insulation medium of the main components:

  • GSec has SF6 (sulfur hexafluoride) gas as the insulation medium.

  • GSec Air is a load breaking switch (LBS) and disconnector with dry air as the insulation medium and vacuum interrupters. GSec has a global warming potential (GWP) of 0. It is fully compliant with IEC standards and the EU F-gas regulation (EU) 2024/573.
Does GSec Air require more space?

GSec Air has a similar footprint as the original GSec.

Does GSec Air feature three positions in one device?
Yes, GSec Air features three positions in one device: LINE – OPEN – EARTH

Learn More

GSec Air Technical Leaflet
A03 - ABB DALMINE GSEC 192
GSec brochure

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