A potent gas that depletes the ozone layer and significant greenhouse gas, sulphur hexafluoride (SF6) was the latest gas to be added to the Montreal Protocol, a UN accord credited with slowing depletion of the ozone layer.
Now banned, voluntarily, worldwide, it seems safe to say that no one really no one knows how much or to what extent or degree SF6 is still being used. Major electrical equipment manufacturers are on board. That's the case at GE, the aim being to expand its SF6-free line of high voltage equipment Green Gas to Grid (g3) products by more than 99% by 2025, while at the same time improving technical performance, management highlights.
"Due to its strong insulating properties, SF6 is widely used in substation equipment such as switchgear and instrument transformers, with the transmission industry accounting for approximately 80% of the world’s usage. However, this potent greenhouse gas is estimated to contribute 23,500 times more emissions than CO₂ in the event of a leakage and can remain in the atmosphere for up to 3,200 years," GE explains in a press release.