Project Overview

ElectraNet proposes to replace individual transformer and reactor bushings on 13 high voltage transformers and two reactors at 12 substations to maintain safe and reliable electricity supply to customers.

This Regulatory Investment Test for Transmission (RIT-T) Project Specification Consultation Report (PSCR) identifies the need to replace transformer and reactor bushings on 13 high voltage transformers and two reactors at 12 substations by 2028 as the preferred solution to manage the risk that these assets will fail.

The transformer and reactor bushings in question for this PSCR are between 37 and 47 years old and are in poor condition and have reached the end of their technical lives. There is an increasing risk of catastrophic failure of the associated transformers and reactors if these bushings are not replaced with consequential safety risks and the potential for involuntary load shedding on parts of the network.

The ‘identified need’ is to efficiently manage the risk of asset failure.

The identified need for this project is to continue to provide safe and reliable electricity transmission services in South Australia at a prudent and efficient cost. Specifically, the identified need for this Regulatory Investment Test for Transmission (RIT-T) is to efficiently manage the risk of failure of transformer and reactor bushings at 12 substations that are in poor condition and have reached the end of their technical lives.

PSCR Managing the Risk of Transformer Bushing Failures 2024-2028 (PDF)
PSCR AEMO NEM communication - Managing the Risk of Transformer Bushing Failures 2024-2028 (PDF)