GE Renewable Energy’s Grid Solutions business has been awarded a contract for Sweden’s first SF6 free gas-insulated switchgear to be installed at the Vattenfall Eldistribution AB Lindhov substation in Tumba, located approximately 25 km from the center of Stockholm. The switchgear will feature GE’s industry-leading g3, g cubed gas, a game changing alternative to SF6, a potent greenhouse gas, with a global warming potential that is about 99% less compared to SF61. The project scope covers the design, engineering, delivery, and erection & commissioning of eight bays of GE’s F-35-41g 145 kV g3 switchgear.A recent EU Commission report concluded that fluoronitrile-based gas mixtures, such as g3 gas, may be the only insulating and switching gas alternative to SF6 when space is a constraint, such as in urban areas. That’s because fluoronitrile-based gas products feature the same compactness and performance as traditional SF6 equipment, unlike other SF6-free solutions.GE’s g3 gas-insulated products are currently available for live-tank circuit-breakers and gas-insulated substations up to 145 kV, as well as gas-insulated lines up to 420 kV.Due to its strong insulating and arc-quenching properties, SF6 is widely used in substation equipment with the transmission industry accounting for approximately 80% of the world’s usage. Identified as a potent greenhouse gas by the 1997 Kyoto Protocol, SF6 is estimated to contribute 23,500 times more emissions than CO₂ when leaked and can remain in the atmosphere for up to 3,200 years.