Regulatory Investment Test – Transmission – August 2025
AusNet Services is undertaking this Regulatory Investment Test for Transmission (RIT-T) to evaluate options to maintain reliable transmission network services at South Morang Terminal Station (SMTS).
The Project Specification Consultation Report (PSCR), which represents the first step in the RIT-T process in accordance with clause 5.16 of the National Electricity Rules (NER) and section 4.3 of the RIT-T Application Guidelines was published in June 2024. This report, the Project Assessment Draft Report (PADR), is the second stage of the RIT-T and provides information about the draft conclusions of the RIT-T.
No non-network proposals were received during the RIT-T PSCR consultation.
The preferred option to address the asset failure risk at SMTS is replacement of the 500kV gas-insulated switchgear (GIS) with air-insulated switchgear (AIS) and like-for-like replacement of the F2 500/330 kV transformer by 2032.
AusNet Services welcomes written submissions on the issues and the credible options presented in this PADR. Submissions should be emailed to [email protected] on or before 24 October 2025. In the subject field, please reference ‘RIT-T - Maintaining Reliable Transmission Network Services at SMTS’.
1 Australian Energy Regulator, “Application guidelines Regulatory investment test for transmission”.