The Regulatory Investment Test for Transmission (RIT-T) is a three-stage market consultation process undertaken by ElectraNet as the principal Transmission Network Service Provider (TNSP) in South Australia.

The RIT-T is the public economic cost benefit test administered by the Australian Energy Regulator that must be undertaken for all augmentation projects with credible solutions that are estimated to cost more than $6 million.

This is an essential process that ensures the final recommended solutions have long term benefits, meet mandated reliability standards and can be scaled with changing electricity demands.

By using the three stage process, ElectraNet can identify solutions that have the potential to bring about greater net benefits to the market.

For example, a particular option may involve additional works but may then ease congestion and constraints on the existing electricity transmission network.

Other potential benefits could include:

  • reduced electricity losses
  • network and generation investment deferral
  • generation fuel cost-savings
  • avoided loss of supply for customers
  • increased competition in the NEM.

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What is the process?

A typical RIT-T process has three stages. The first two stages gain feedback and advice from the market, and the third presents our findings, final recommended solution, and intended course of action.

  • 12 week consultation period.
  • Specifies what issue needs to be solved.
  • Requests feedback and advice from stakeholders.
  • Stakeholders include the Australian Energy Market Operator, registered participants, and interested parties.

We engage with these parties during the 12 week consultation period and also develop a selection of proposed solutions to meet the need identified in the original report.

  • Further six week consultation period.
  • A summary of the advice received from stakeholders.
  • Economic assessment of credible options and selection of the most suitable choice.

After receiving the feedback and advice from consultation on the Project Specification Consultation Report, we assess the proposed solutions for their economic viability as well as their potential to bring other benefits to the NEM. The outcome of the consultation on the Project Specification Consultation Report and subsequent options analysis is then documented in the Project Assessment Draft Report.

  • Final stage of the process.
  • Indicates the preferred solution.
  • Outlines the intended course of action.

Once all feedback and advice has been received and analysed, this report will indicate the final preferred option. It will also outline an intended course of action for a reliable and cost-effective solution to meet the project’s investment need.


Frequently Asked Questions

What is the Regulatory Investment Test for Transmission (RIT-T)?

The RIT-T is a cost benefit analysis applicable to relevant regulated electricity transmission investments initiated from 1 August 2010 onwards, to ensure the recommended solution is the most economic. It requires consideration of the costs of options to…Read more in full article

What is the Regulatory Test?

The Regulatory Test is the now superseded cost-benefit analysis which was applicable to regulated electricity transmission investment assessments initiated prior to 1 August 2010 to ensure the recommended investment solution was the least cost option. Note that SA…Read more in full article

Why was there a change from the Regulatory Test to the RIT-T and what are the differences?

The Energy Reform Implementation Group (ERIG) conducted a review of the operation of Australia’s energy sector and found that the investment decision-making criteria in the Regulatory Test were appropriate and should be retained. However, the ERIG recommended that…Read more in full article

Why does ElectraNet need to undertake the RIT-T process?

The application of the RIT-T ensures that the recommended investment solution is the most economic option, including consideration of non-network options (for example, embedded generation or demand-side response), that satisfies the identified need while meeting mandated reliability standards and…Read more in full article

Does the RIT-T involve consultation with industry?

Yes. According to the NER, if the most expensive technically and economically feasible option for a regulated electricity transmission investment is more than $6 million, ElectraNet is required to consult with registered participants, the Australian Energy Market Operator…Read more in full article

Who are Interested Parties?

Interested parties are representatives or individuals who AEMO determines have an interest in regulated network planning and development – such as large industrial-load electricity transmission customers – who may offer a non-network solution to reduce electricity use during…Read more in full article

Who are Registered Participants?

Registered participants include power generators, transmission network customers, traders, re-allocators, retailers and electricity distributors (such as SA Power Networks). Registration with AEMO as a registered participant allows participation in the NEM.

What are my rights of reply to the conclusions in the Project Assessment Conclusions Report?

A process has been established for the resolution of RIT-T disputes, including the required timeframe for the lodgement of a dispute submission. Should any relevant parties seek to challenge the conclusions of a Project Assessment Conclusions Report, ElectraNet…Read more in full article

Project Status Type Reports Closing Dates Status Submissions
Eyre Peninsula Electricity Supply Options Eyre Peninsula Under Consideration Transmission Line
Project Specification Consultation Report Consultation Open -
South Australian Energy Transformation State-Wide Under Consideration
Project Specification Consultation Report Consultation Closed -
Market Modelling Approach and Assumptions Report Consultation Closed -
Northern South Australia Region Voltage Control Upper North In Progress Substation
Project Specification Consultation Report Consultation Closed -
Maintaining Reliable Electricity Supply to
Port Lincoln
Eyre Peninsula
Complete Substation
Request for Information Consultation Closed -
Application Notice Consultation Closed -
Final Report Consultation Closed -
Kadina East Transformer Capacity Increase Mid North Complete Substation
Application Notice Consultation Closed -
Final Report Consultation Closed -
Bungama Substation Redevelopment Mid North Complete Substation
Request for Information Consultation Closed -
Application Notice Consultation Closed -
Final Report Consultation Closed -
Ardrossan West Substation Rebuild Mid North Complete Substation
Application Notice Consultation Closed -
Final Report Consultation Closed -
Adelaide Central Reinforcement Near Metro Complete Substation and Transmission Cable
Request for Information Consultation Closed -
Application Notice Consultation Closed -
Final Report Consultation Closed -
Managing voltages in the Mid North Mid North Under Consideration Substation
Project Specification Consultation Report Consultation Closed -
Eyre Peninsula Reinforcement Project Eyre Peninsula Under Consideration Substation and Transmission Line
Project Specification Consultation Report Consultation Closed
Project Assessment Draft Report Consultation Closed
SA-Vic (Heywood) Interconnector Upgrade South East In Progress Substation and Transmission Line
Project Specification Consultation Report Consultation Closed
Project Assessment Draft Report Consultation Closed
Project Assessment Conclusions Report Consultation Closed
Dalrymple Substation Upgrade Mid North In Progress Substation
Project Specification Consultation Report Consultation Closed -
Project Assessment Conclusions Report - Consultation Closed -
Baroota Substation Upgrade Mid North Under Consideration Substation
Project Specification Consultation Report Consultation Closed
Project Assessment Draft Report Consultation Closed