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

Click the arrow to learn more about product scope.

 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.

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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

Related offering

UniSec Air
VD4/R
IEC current limiting back-up fuse CEF
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