Southbrook 66kV Substation upgrade

The communities in and around Rangiora are growing. Over the last few years, MainPower has been working on an upgrade of our Southbrook Substation, which supplies power to these areas.

In October, two new transformers were lifted into place at the site, marking a milestone in the project that began in 2019.

The project is set for completion in 2022 and will help provide a more resilient supply of power to our customers in the region, while allowing for the growth in the number of homes and businesses connecting to the network into the future.

October 2021 update:

The two new transformers for the substation delivered and lifted onto their foundations.

July 2021 update:

The transformer foundations have been poured and switchroom construction is underway. Once complete, the switchroom will house 11kV switchboards and protection, as well as control and communications equipment.

June 2021 update:

Concrete poured for new switchroom foundations. Civil works continue to progress to schedule.


  • design of the zone substation completed
  • system equipment procured
  • geotechnical works
  • compound and earthing works
  • other civil works