1. National Grid powers the first sustainable Gas Insulated Line
3M Electronics

 

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    National Grid powers the first sustainable Gas Insulated Line

    November 29, 2016
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    National Grid powers the first sustainable Gas Insulated Line

    With electric power generation accounting for around 26 per cent of global greenhouse gas emissions, finding more sustainable alternatives to potent pollutants such as SF₆ is a key priority for power utilities.

    National Grid powers the first sustainable Gas Insulated Line

    With electric power generation accounting for around 26 per cent of global greenhouse gas emissions, finding more sustainable alternatives to potent pollutants such as SF₆ is a key priority for power utilities.

    National Grid powers the first sustainable Gas Insulated Line

    With electric power generation accounting for around 26 per cent of global greenhouse gas emissions, finding more sustainable alternatives to potent pollutants such as SF₆ is a key priority for power utilities.

    • National Grid - Sellindge

      Sulphur hexafluoride, or SF₆, is commonly used as an insulating and quenching material in high and medium voltage transformers, circuit breakers, Gas Insulated Line (GIL) and switchgear installations, but has a global warming potential 23,000 times greater than carbon dioxide.

      Following four years of research and collaboration, GE has developed the first SF₆-free 420kV GIL solution that has been installed at National Grid’s substation in Sellindge, Kent.

      This uses an insulating gas mixture developed by GE called g³ (green gas for grid) that is made with 3M™ Novec™ Dielectric Fluid as an alternative to SF₆ and is expected to reduce greenhouse gas emissions by 98 per cent.

      As well as being more sustainable, the gas mix solution using Novec dielectric fluids meets all the tough specifications for high voltage switchgear installations, such as having a high dielectric strength, a good quenching capability, being safe for workers and easy to handle.

      Mark Waldron, Switchgear Technical leader at National Grid, said: “National Grid has promoted finding an alternative to SF₆ for some time. As a company, we have established targets for the reduction of greenhouse gases, which are 45 per cent by 2020 and 80 per cent by 2050 against a 1990 baseline.

      “What’s exciting for us is that g³ opens the way for reducing or eliminating SF₆ and that’s something that for National Grid is really important.”

       

      GE and g³ are trademarks of General Electric Company.

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