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Transformer monitoring data

Making transformer monitoring data available for research will allow for analysis of seasonal trends, and to investigate the impact of Distributed Energy Resources (such as solar, batteries and EVs) on our network, as we transition towards net-zero.

Transformer monitors are installed on the low voltage (LV) terminals of our distribution transformers to record power quality performance. They are used to evaluate voltage compliance and transformer utilisation. Whilst an aggregated summary of compliance is provided in the Distribution Annual Planning Report, per-transformer data allows for many additional insights.

To satisfy privacy requirements, all distribution transformer monitors with fewer than 25 connections have been removed.

Data format

Transformer monitor data is supplied in the NEM12 Meter Data File Format developed by Australian Energy Market Operator (AEMO). They are grouped by operational area, with the file name containing the operational number of the distribution substation and the financial year of the data.

The below table shows how the NEM12 Data streams should be interpreted.

Data suffixUnitMeasure
V1 / v2 / v3VVoltage
I1 / I2 / I3ACurrent
<1 / <2 / <3°Current Phase Angle
T1 / T2 / T3%Total Harmonic Distortion (THD)

Further information regarding the configuration of our electricity distribution network can be found in our Distribution Annual Planning Report.

Transformer monitoring LV data reports 2021-22

Brisbane Central (Zip File, 1.2 GB)14 February 2023
Brisbane North (Zip File, 2.2 GB)14 February 2023
Brisbane South (Zip File, 2.8 GB)14 February 2023
Gold Coast (Zip File, 1.3 GB)14 February 2023
Ipswich Lockyer (Zip File, 944 MB)14 February 2023
Sunshine Coast (Zip File, 1.3 GB)14 February 2023


Energex does not make any representation or warranty as to the reliability, timeliness, quality, suitability, availability, accuracy or completeness of any content contained in or generated by, these datasets, or that:

  • access to the data will be secure, timely, uninterrupted or error-free
  • the data or any servers or other platforms that make the data available are free of viruses or other harmful components.

To the extent permitted by law, Energex disclaims any and all warranties and representations of any kind, including any warranty of non-infringement, title, fitness for a particular purpose, functionality or merchantability, whether express, implied or statutory, and all liability (including for negligence) for any loss or damage which may be incurred as a result of access to or use of the data or its contents.