Sulphur Hexafluoride (SF6) is a compound that is used globally in High Voltage switchgear. Manufacturers design switchgear with this gas because of its very high electrical insulating properties, allowing the switchgear to work efficiently and safely. As part of ESB Networks development programme that cost in excess of €100m, the original switchgear at the Moneypoint Transmission Station was de-energised in June 2019 and replaced with new equipment which uses far smaller quantities of SF6, to reduce the risk of leaks.
Read more
here.