Transmission & distribution |


at one of its 345 kV substations. Hitachi Energy says the EconiQ 420 kV DTB will be just as reliable as SF6


based DTB technology.


The use of fluoronitrile-based gas mixtures as an alternative to SF6


in


high-voltage equipment has led to the development of a “game-changing solution that the industry will likely converge upon,” says Hitachi Energy. It believes the technology is game changing because it “retains the best of SF6


and is 100% as reliable


in the industry, which will support the widest range of applications in switchgear.”


as the conventional solution while reducing equipment size, materials and carbon footprint throughout the product lifecycle” and this “unlocks the acceleration of eco-efficient alternatives to SF6


Hitachi Energy is using/will use fluoronitrile-based gas mixtures for gas-insulated switchgear, dead tank breakers, hybrid switchgear and current transformers for both indoor and outdoor applications, down to -30°C. For some other applications, such as SF6


-free live tank breakers, Hitachi Energy considers a CO2


/O2 Above: Hitachi Energy’s 420 kV EconiQTM SF6 -free dead tank breaker optimum choice.” mixture “the


Above: Hitachi Energy’s road map (as of August 2022) for development of the EconiQ SF6 18 | September 2022| www.modernpowersystems.com


-free high-voltage portfolio


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