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Transformer replacement icon
RIT-T Costs 5.7 million Icon
RIT-T Calendar December 2019 Icon


Powerlink has recently published a ‘Project Assessment Conclusions Report’ to maintain reliability of supply at the Ingham South Substation.

Ingham South Substation was established in 2005 as a replacement for the original Ingham Substation. Two 132/66kV transformers connect the substation to the Ergon Energy switchyard at Ingham, supplying the local area. Both transformers are now over 50 years old, having previously been installed at other locations on the network, and are nearing the end of their technical service lives, with an increasing risk of failure.

The first step of the Regulatory Investment Test for Transmission (RIT-T) was the publication of the Project Specification Consultation Report (PSCR) in June 2018 which invited submissions particularly on the credible options which could address the identified need.

The proposed preferred option identified in the PSCR considered to satisfy the RIT-T involves replacing both transformers at Ingham South Substation by December 2019. There were no submissions received in response to the PSCR which closed in September 2018. As a result, no additional credible options have been identified as part of this RIT-T consultation. 

The outcomes of the economic analysis contained in the PACR remain unchanged from those published in the PSCR. Consequently, the draft recommendation to replace both transformers by December 2019 has been adopted without change as the final recommendation in the PACR.

The estimated capital cost is $5.7 million in 2017/18 prices. Powerlink is the proponent of this project. 

In the context of engagement activities with consumers and the general community, Powerlink has assessed this project as ‘minor’ on the RIT-T Stakeholder Engagement Matrix.

A copy of the Project Assessment Conclusions Report is available below.