Southbrook Substation Upgrade

Overview: Rangiora and the surrounding area is experiencing significant growth through new subdivisions and businesses. Southbrook zone substation, which supplies this region, currently operates at 33kV. This project upgrades the substation to a higher capacity 66kV/11kV 40MVA zone substation. This also improves operational capability with neighbouring zone substations and improves the Southbrook site’s resilience.

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Outage notifications

Maintenance - Swannanoa Substation

Due to maintenance of Swannanoa Substation streetlights will remain switched on in the greater Swannaona area from Sunday 21/09/25 trough to Saturday morning 11/10/25

Is your outage not listed?

Troubleshoot your outage
Treat all lines as live during the outage period; power may be restored at any time. If you require further information, please call MainPower’s 24-hour faults line. To report an emergency, call 111.

Outage notifications

Maintenance - Swannanoa Substation

Due to maintenance of Swannanoa Substation streetlights will remain switched on in the greater Swannaona area from Sunday 21/09/25 trough to Saturday morning 11/10/25

Is your outage not listed?

Troubleshoot your outage
Treat all lines as live during the outage period; power may be restored at any time. If you require further information, please call MainPower’s 24-hour faults line. To report an emergency, call 111.

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