Ausgrid introduces Schneider Electric SF6‍-‍free switchgear

East coast electricity distributor Ausgrid is introducing SF₆-free distribution switchgear from Schneider Electric into its distribution network.

“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,” said James Hunt, Vice President for Power Systems at Schneider Electric. “Our Pure Air SF₆-free switchgear changes that, demonstrating our ongoing commitment to providing sustainable solutions for our partners.”

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 safety feature is designed to protect both operators and the public, and required no modifications to Ausgrid’s existing enclosure.

“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,” added Hunt. “This solution will effectively prevent 35,000 kg of CO_2-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: “I am really delighted that we have had this opportunity to team with Schneider on our journey towards decarbonisation. Not only are we reducing our reliance on SF₆ gas, we are also 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. Additionally, it integrates seamlessly with Ausgrid’s Advanced Distribution Management System (ADMS) provided by Schneider Electric.