Supply reliability targets
Our reliability targets are listed below. These targets are updated annually.
| 1 July 2026 – 30 June 2027 (FY27) | Urban feeder | Short rural feeder | Long rural feeder | Telephone answering |
|---|---|---|---|---|
| Average minutes off supply per customer due to planned interruptions (PSAIDI) 1 | 89 mins | 175 mins | 287 mins | N/A |
| Average minutes off supply per customer due to unplanned interruptions (USAIDI) | 81 mins | 193 mins | 310 mins | N/A |
| Average number of sustained unplanned interruptions per customer (SAIFI) | 0.73 | 1.45 | 2.08 | N/A |
| Average number of momentary interruptions per customer (MAIFI) | 2.78 | 4.72 | 8.66 | N/A |
| Average duration of unplanned interruptions (CAIDI) 2 | 111 mins | 133 mins | 149 mins | N/A |
| Telephone answering (% calls answered in 30 seconds) 3 | N/A |
N/A |
N/A |
70.06 |
1 No AER target. Internal-only target based on a 5-year (2021-2025) weighted average.
2 Derived from USAIDI and USAIFI targets.
3 Percentage of total calls to the fault line answered in 30 seconds. Time to answer a call is measured from when the call enters the call centre telephone system and is answered by a human operator.
We estimate that approximately 38,600 customers may be entitled to a Guaranteed Service Level payment in the 2026-2027 financial year relating to service levels set by the Electricity Distribution Code of Practice under clause 14.5.
The AER defines:
- an urban feeder as a high-voltage circuit with load density greater than 300kVA/km. Covers outer metropolitan suburbs and major towns
- a short rural feeder as a high-voltage circuit which is not an urban feeder with total length less than 200 km. Covers rural areas near major towns
- a long rural feeder as a high-voltage circuit which is not an urban feeder with total length greater than 200 km. Covers remote rural areas.
If you would like to know more, please contact us.