Regulated revenue investments must undergo the Regulatory Investment Test for Transmission (RIT-T) in accordance with the National Electricity Rules.
As set out in clause 5.16 of the National Electricity Rules, the RIT-T exists to identify the option that maximises the present value of net economic benefit to all who produce, consume and transport electricity in the market.
From 18 September 2017, changes to the National Electricity Rules widened the scope of the RIT-T to include replacement projects.
We are applying the RIT-T to the projects listed in the table below. Submissions are welcome on the current RIT-T projects by the applicable consultation closing date.
| RIT-T | Status | Type | Reports | Closing Dates | Status |
| Meeting system strength requirements in NSW |
PADR Supplementary Report Published |
System Strength |
Project Specification Consultation Report |
15 November 2024 |
Open |
|
System Security Roadmap Operational Technology Upgrades |
PSCR Published |
System Security |
15 January 2025 |
Open |
|
|
Managing risk on Line 82/95 (Tomago-Seahampton) |
PSCR Published |
Transmission Line |
19 December 2024 |
Open |
|
|
Maintaining safe and reliable operation of Tamworth substation |
PSCR Published |
Substation |
14 November 2024 |
Open |
|
|
Managing risk on Line 8C/8J & Line 8C/8E (Dumaresq - Sapphire - Armidale) |
PSCR Published |
Transmission Line |
14 November 2024 |
Open |
|
|
Maintaining safe and reliable operation of Buronga substation |
PSCR Published |
Substation |
14 November 2024 |
Open |
|
| Managing the risk of disconnector failure |
PSCR Published |
Substation |
6 November 2024 |
Open |
|
| Managing increased fault levels in southern NSW |
PSCR Closed |
Reliability |
|
Closed |
|
| Managing risk on Line 94U (Parkes - Forbes) |
PACR Published |
Transmission Line |
|
Closed |
|
| Addressing low spans on Line 1, Line 2, and Line 973/9GL |
RIT-T Complete |
Transmission Line |
|
Closed |
|
| Maintaining compliance with performance standards applicable to Regentville substation secondary systems |
PSCR Closed |
Secondary Systems |
|
Closed |
|
| Maintaining compliance with performance standards applicable to Wallerawang substation secondary systems |
RIT-T Complete |
Secondary Systems |
|
Closed |
|
| Meeting demand growth in the Western Sydney Aerotropolis 'Priority Growth Area' |
PSCR Closed |
Market Benefits |
|
Closed |
|
| Maintaining safe and reliable operation of Molong substation |
RIT-T Complete |
Substation |
|
Closed |
|
| Managing risk on Lines 21, 22, 959 & 92Z (conductor condition) |
RIT-T Complete |
Transmission Line |
|
Closed |
|
| Managing risk on Line 963 (Tomago-Taree) |
PSCR Closed |
Transmission Line |
|
Closed |
|
| Maintaining compliance with performance standards applicable to Lower Tumut substation secondary systems |
RIT-T Complete |
Secondary Systems |
|
Closed |
|
| Maintaining safe and reliable operation of Murray substation |
RIT-T Complete |
Substation |
|
Closed |
|
| Maintaining compliance with performance standards applicable to Sydney East substation secondary systems |
RIT-T Complete |
Secondary Systems |
|
Closed |
|
| Maintaining compliance with performance standards applicable to protection relays |
RIT-T Complete |
Secondary Systems |
Project Specification Consultation Report |
|
Closed |
| Maintaining reliable supply to Western Sydney |
PSCR Closed |
Reliability |
|
Closed |
|
| Managing the risk of capacitor bank failure |
RIT-T Complete |
Substation |
|
Closed |
|
| Managing risk on Line 977/1 (Canberra - Queanbeyan) |
RIT-T Complete |
Transmission Line |
|
Closed |
|
| Maintaining voltage levels in Northern NSW |
RIT-T Complete |
Reliability |
|
Closed |
|
| Managing risk on Line 966 (Armidale – Koolkhan) |
RIT-T Complete |
Transmission Line |
Project Specification Consultation Report Project Assessment Conclusions Report
|
|
Closed |
| Managing risk on Line 16 (Marulan – Avon) |
RIT-T Complete |
Transmission Line |
|
Closed |
|
| Maintaining safe and reliable operation of Beryl substation |
RIT-T Complete |
Substation |
|
Closed |
|
| Managing the risk of circuit breaker failure |
RIT-T Complete |
Substation |
|
Closed |
|
| Managing risk on Line 23 (Vales Point – Munmorah) |
RIT-T Complete |
Transmission Line |
|
Closed |
|
| Managing risk on Southern Sydney transmission lines |
RIT-T complete |
Transmission Line |
|
Closed |
|
| Managing expected demand in the Panorama area |
RIT-T Cancelled |
Reliability |
Project Specification Consultation Report |
|
Closed |
| Increasing capacity for generation in the Molong and Parkes area |
RIT-T Complete |
Market benefits |
Project Specification Consultation Report PSCR Submissions: PADR documents: |
Closed
|
|
|
Maintaining Reliable Supply to Deniliquin Coleambally and Finley area |
RIT-T Complete |
Reliability |
|
Closed
|
|
|
Managing safety and environmental risks on Line 24 (Vales Point - Eraring) |
RIT-T Complete |
Transmission Line |
|
Closed Closed |
|
|
Managing risk on Line 86 (Tamworth-Armidale) |
RIT-T Complete |
Transmission Line |
Project Specification Consultation Report |
|
Closed Closed Closed |
|
Maintaining compliance with performance standards applicable to Ingleburn substation secondary systems |
RIT-T Complete |
Secondary Systems |
|
Closed Closed |
|
|
Managing safety and environmental risks on Line 21 (Tuggerah - Sydney North) |
RIT-T Complete |
Transmission Line |
|
Closed Closed |
|
|
Managing safety and environmental risks on Line 18 (Kangaroo Valley - Dapto) |
RIT-T Complete |
Transmission Line |
|
Closed Closed Closed |
|
|
Maintaining reliable supply to the North West Slopes area |
RIT-T Complete |
Reliability |
Project Specification Consultation Report Project Assessment Draft Report |
|
Closed Closed Closed
|
|
Maintaining reliable supply to Bathurst, Orange and Parkes areas |
RIT-T Complete |
Reliability |
Project Specification Consultation Report Project Assessment Draft Report |
|
Closed Closed Closed
|
|
Maintaining compliance with performance standards applicable to Liverpool substation secondary systems |
RIT-T Complete |
Secondary Systems |
|
Closed Closed |
|
|
Maintaining compliance with performance standards applicable to Darlington Point substation secondary systems |
RIT-T Complete |
Secondary Systems |
|
Closed Closed |
|
|
Managing asset risks at Forbes substation |
RIT-T Complete |
Substation |
|
Closed Closed |
|
|
Improving stability in south-western NSW |
RIT-T Complete |
Increase network stability limits |
Project Specification Consultation Report Project Assessment Draft Report |
|
Closed Closed Closed |
|
Maintaining compliance with performance standards applicable to Murrumburrah substation |
RIT-T Complete |
Secondary Systems |
|
Closed Closed |
|
|
Managing safety and environmental risks on Line 17 |
RIT-T Complete |
Transmission line |
|
Closed Closed |
|
|
Meeting demand growth in the Greater Macarthur area |
RIT-T Complete |
Reliability |
|
Closed Closed |
|
|
Maintaining compliance with performance standards applicable to Tuggerah substation secondary systems |
RIT-T Complete |
Secondary Systems |
Closed Closed |
||
|
Maintaining compliance with performance standards applicable to Broken Hill substation secondary systems |
RIT-T Complete |
Secondary Systems |
Project Specification Consultation Report Project Assessment Draft Report Submission: Public Interest Advocacy Centre |
|
Closed Closed Closed Closed |
|
Maintaining a reliable supply to Broken Hill |
RIT-T Complete |
Reliability |
Project Specification Consultation Report Project Assessment Draft Report (superseded) |
|
Closed Closed Closed Closed |
|
Managing safety and environmental risks on Line 3W (Kangaroo Valley - Capital Wind Farm) |
RIT-T Complete |
Transmission line |
|
Closed Closed |
|
|
Managing safety and environmental risks on Line 81 (Newcastle - Liddell) |
RIT-T Complete |
Transmission line |
|
Closed Closed |
|
|
HumeLink
|
RIT-T Complete
|
Intraregional Capacity Transfer
|
|
Closed |
|
|
Project Assessment Draft Report (Superseded) |
Closed |
||||
|
Project Assessment Draft Report (Amended)* |
Closed |
||||
|
Closed |
|||||
|
Project Assessment Conclusions Report Addendum *Schematic drawings for Options 3 and 4 on page 21 of the PADR were inadvertently transposed in the document issued on 10 January, and corrected on 15 January 2020. |
Closed
|
||||
|
Maintaining compliance with performance standards applicable to Wagga 330kV substation secondary system |
RIT-T Complete |
Secondary Systems |
|
Closed Closed |
|
|
Maintaining compliance with performance standards applicable to Deniliquin substation secondary system |
RIT-T Complete |
Secondary Systems |
|
Closed Closed |
|
|
Maintaining a reliable Static Var Compensator at Lismore |
RIT-T Complete |
Static Var Compensator |
Closed Closed |
||
|
Maintaining compliance with performance standards applicable to Haymarket substation secondary systems |
RIT-T Complete |
Secondary Systems |
Closed Closed |
||
|
Managing Sydney East substation's asset risks |
RIT-T Complete |
Substation |
Closed Closed |
||
|
Maintaining a reliable Upper Tumut substation |
RIT-T Complete |
Substation |
Closed Closed |
||
|
Managing safety and environmental risks from corrosion on Line 959_92Z |
RIT-T Complete |
Transmission line |
Closed Closed |
||
|
Managing asset risks at South Sydney substation |
PADR Closed |
Substation |
Closed Closed |
||
|
Managing the Risk of Corrosion between Vineyard and Munmorah on Line 25 & 26 |
RIT-T Complete |
Transmission line |
Project Assessment Consultation Report |
Closed Closed Closed |
|
|
Managing the Risk of Corrosion on Line 8 |
RIT-T Complete |
Transmission line |
Closed Closed |
||
|
Managing the Risk of Corrosion between Vales Point and Sydney North on Line 22 |
RIT-T Complete |
Transmission line |
Closed Closed |
||
|
Victoria to NSW Interconnector Upgrade (VNI) |
RIT-T Complete |
Interconnector |
Project Assessment Conclusions Report |
Closed Closed Closed |
|
|
Victoria to NSW Interconnector West (VNI West) |
PACR Published |
Interconnector |
Project Assessment Conclusions Report |
Closed |
|
|
Expanding NSW-QLD Transmission Transfer Capacity (QNI) |
RIT-T Complete |
Interconnector |
Project Assessment Conclusions Report |
Closed Closed Closed |
A small number of Transgrid projects were committed during the transitional period, 18 September 2017 to 30 January 2018, and are excluded from the RIT-T process:
|
Project |
Description |
Completion date |
|
Lower Tumut Secondary Systems Renewal |
Replacement of secondary systems equipment at Lower Tumut |
June 2020 |
|
SCADA-EMS Replacement |
Replacement and commissioning of the new SCADA between TransGrid sites and AEMO, as well as third parties |
July 2020 |