Powerlink has published a Project Assessment Conclusions Report (PACR) to address the risk of current transformer failures in northern, central and southern Queensland.
Current transformers are installed at substations to measure and monitor the current flowing through transmission lines. They are a crucial component of the protection system that ensures electrical faults are cleared within the designated times as specified in the National Electricity Rules (NER).
Powerlink’s network is experiencing some premature failures of a 275kV current transformer particular make and model (current transformer subset). These current transformers perform functions such as revenue metering, power system monitoring, telemetry, and protection system performance which are key to managing the network. Failures can also result in network and load interruptions as well as loss of containment of oil and sand.
Powerlink proposes a program of state-wide replacement of the subset of current transformers to address the network need. Powerlink published the PADR in March 2026 and indicated that design and construction works would commence in 2026, and commissioning will be completed by 2029. No submissions were received in relation to the PADR.
The PACR is the final step in the RIT-T process and completes Powerlink’s technical and economic assessment of credible options to address the risk of premature current transformer failures.
In the context of engagement activities with customers and the general community, Powerlink has assessed this RIT-T project as ‘minor’ on the RIT-T stakeholder engagement matrix.
Earlier PADR and PSCR documents relating to the Current Transformer Failures RIT-T, are available below: