Hitachi to deliver 550 kV gas-insulated switchgear to Chubu Electric Power Grid

12 Mar Hitachi to deliver 550 kV gas-insulated switchgear to Chubu Electric Power Grid

(Oilandgaspress) – Hitachi, Ltd. announced today that it has received an order from Chubu Electric Power Grid for Hitachi Energy’s EconiQⓇ 550 kilovolt (kV) sulfur hexafluoride (SF6)-free gas-insulated switchgear (GIS). This is set to be the world’s first project with 550 kV GIS*1 in which the entire equipment is SF₆-free.

The EconiQ 550-kV GIS reduces CO2-equivalent emissions from the insulating gas by 99 percent compared with conventional SF₆ insulated equipment. By delivering this technology, Hitachi will support Chubu Electric Power Grid in making Japan’s transmission network sustainable. For decades, SF6 gas has been widely used in power grids due to its excellent insulation properties and switching performance. However, it has a global warming potential 24,300 times higher than CO2 and remains in the atmosphere for more than 1,000 years if released. Many governments are now introducing regulations to phase out new SF6–based equipment to address climate change. Currently, Japan has no regulations on eliminating SF6 gas equipment.

As Japan’s electricity demand rises with increased electrification and the growth of data centers, the need to reinforce the grid while reducing greenhouse gas emissions becomes more urgent. SF6-free switchgear, such as Hitachi Energy’s EconiQ technology, offers the solution to this twofold challenge – combining proven reliability and compact design with the lowest carbon footprint.

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