Australia’s largest electricity distributor on the east coast, Ausgrid, has taken steps to decarbonise its grid operations with the introduction of SF6-free distribution switchgear.
Engaged by Ausgrid, Schneider Electric developed an SF6-free kiosk pad substation, designed with internal arc containment to ensure any HV arcs or faults are contained within the kiosk.
This crucial safety feature is designed to protect both operators and the public, requiring no modifications to Ausgrid’s existing enclosure.
Vice president of power systems at Schneider Electric, James Hunt, said that since the 1980s, Ring Main Units (RMUs) have used SF6 as the insulation medium due to its superior dielectric properties.
“Unfortunately, SF6 gas is 23,500 times more potent than CO2, posing a substantial environmental risk if leaked. Until now, no viable alternative existed,” he said.
“Our Pure Air SF6-free switchgear changes that, demonstrating our ongoing commitment to providing sustainable solutions for our partners.
“This is one of the first internally arc-rated SF6-free kiosk designs on the market, showcasing our capability to create a greener network across Australia."
Hunt said the solution will prevent 35,000 kg of CO2-eq from entering Ausgrid’s network, while maintaining the same high levels of safety and operation.
Ausgrid’s head of design & engineering services, Brett Hawkeswood, said the distributor isn’t just reducing its reliance on SF6 gas, but strengthening important safety features on the network.
"The new kiosk also features automation capabilities with Schneider’s T300 technology, allowing the control room to perform switching commands remotely,” Hawkeswood said.
“Additionally, it integrates seamlessly with Ausgrid’s Advanced Distribution Management System (ADMS) provided by Schneider Electric, ensuring optimal grid reliability.”