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Home > HV/MV Equipment > g3 Insulating & Switching Gas

g3 G3 - SF6 SF6 Alternative For High Voltage Applications

SF6 SF6 (or Sulphur Hexafluoride) had been the standard gas used inside high voltage electrical equipment as an insulating and arc-quenching medium. However, SF6 SF6 is also listed as an extremely potent greenhouse gas according to the Kyoto protocol, with 23,500 times the comparative Global Warming Potential of CO2 and a lifetime of 3,200 years in the atmosphere. With grid operators across the world becoming increasingly concerned about the environmental impact, GE offers a commercially available and viable alternative to SF6 SF6 to help utilities and industries reduce their environmental impact.

INTRODUCING g3 G3 INSULATING AND SWITCHING GAS
g3, G3 (pronounced "g" cubed) is GE's game-changing alternative to SF6 SF6 gas, developed for HV electrical transmission equipment.

g3 products feature the same ratings and same dimensional footprint as the state-of-the-art SF6 ones, with a drastically reduced environmental impact: more than 99% less gas global warming potential (GWP), comparatively. g³ products have a significantly improved life cycle assessment (LCA) compared with SF6 products and other alternatives. In addition, with product dimensions remaining the same, there is no major increase of raw materials, thus no pollution transfer induced on any other environmental indicators. Also, g3 products operate with no restriction under the same temperature range as SF6 products (down to -30°C). 

g3 G3 products feature the same ratings and same dimensional footprint as the state-of-the-art SF6 SF6 ones, with a drastically reduced environmental impact: more than 99% less gas global warming potential (GWP), comparatively. Also, g3 G3 products operate with no restriction under the same temperature range as SF6 SF6 products (down to -30°C).

Like SF6, g3 is non-toxic and not flammable. It falls in the same safety class as SF6.

g³ Range of Products

  • GAS-INSULATED
    LINES 420 kV
    ALM PROGRAM

    -99.3 % CO2 equivalent of installed gas mass

    For -30°C application

    Read More
  • GAS-INSULATED
    SUBSTATIONS 145 kV
    Extended warrranty

    -99.1 % CO2 equivalent of installed gas mass

    For -25°C application

    Read More
  • AIS
    CIRCUIT-BREAKERS 145 kV
    Advanced data collection

    -99.3 % CO2 equivalent of installed gas mass

    For -30°C application

    Read More
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g³ Product Portfolio Development

  • EU's LIFE program awards €2.2 mn for World's First SF₆-free 420 kV CB

    Recognizes potential of GE's g³ gas to help cut global greenhouse gas emissions, demonstrating that g³ technology can be applied to all other high-voltage levels of Europe's electrical networks.

  • EU supports GE's development of a 245 kV g³ CB

    Second GE's g³ gas project to be co-funded by the EU within two years. New g³ gas 245 kV circuit-breaker will be scalable to other high-voltage levels across Europe's electrical grids.

  • U.S. DOE awards $3.7mn for decarbonization projects with g³ gas technology

    First award relates to the development of a SF₆-free 245 kV dead tank circuit-breaker. Second award will focus on the life cycle management of g³ products.

  • EU affirms confidence in GE’s g³ technology by co-funding development of its 245 kV g³ GIS

    This is the third project co-funded by the EU within 4 years. This new g³ 245 kV GIS will play an important role in meeting demand for compact SF₆-free substations in urban areas, as well as offshore projects

G3 Interactive Explorer

g3 Insulating & Switch Gas Interactive App

Project References

g³ insulating and switching gas is a proven alternative to SF6 SF6 that provides technical, environmental and financial advantages.

30+ LEADING UTILITIES
have decided to use
equipment with g³ G3
1 MILLION+ TONS OF CO2 EQUIVALENT
To date, g³ G3 projects have avoided
the installation of 1 million+ tons of
additional greenhouse gas on
electrical networks
G3 Gas-Insulated Substations
145 kV, -25 °C
20+ sites - 200+ bays
g³ Gas-Insulated Substations
420 kV, -25 °C/-30°
1 site - 9 bays
G3 Gas-Insulated Lines
420 kV, -25 °C
10 sites - 5000+ meters
G3 Live Tank Circuit-Breakers
145 kV, -30 °C
10+ sites - 100+ LT
Connect with our global g³ G3 team today to learn more
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Key Benefits

g³ is a fully type-tested gas mixture that provides the same technical performance as SF6, SF6 while reducing the environmental impact.

Applied to HV Switchgear, the g³ gas Global Warming Potential (GWP) is reduced by more than 99%. In other words, the residual gas GWP is less than 1% of that of SF6 SF6
The environmental benefits of g³ are not limited to Global Warming mitigation. A Life Cycle Assessment demonstrates that using G3 improves all the environmental indicators compared to SF6 SF6
g³ products feature the same performance and dimension as SF6 SF6 products
Utilities can adopt best
practices
in terms of
environment sustainability
Utilities can qualify for tax reduction
or incentives
related to greenhouse
gas emissions reduction

Videos & Testimonials

This collection of videos and industry expert talks explores SF6-free SF6-free insulating gas for HV switchgear and the impacts on the environment between various mixtures including SF6 SF6 versus g³. Discover what GE's g³ replacement for SF6 SF6 gas means for HV equipment.

Video - Customer insights, National Grid's Mark Waldron Video - GE g3 solution for GIS Video - g3 animation Video - Customer insights, TunneT TSO about g3, Dr. Florian Martin Video - g3 Insulating & Switching Gas Industry Expert Talk - Next generation gas for HV Equipment

Better for the Grid and Better for the Planet, learn more about
G3 insulating and switching gas by contacting one of our technical experts