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OVERVIEW

New Greerton switching station supports Tauranga development

The challenge

The Greerton 33kV switching station is critical for electricity supply to the Northern Tauranga region.  It supplies substations in Omokoroa, Aongatete, Katikati, Kauri Point, the Bethlehem suburb, and Otumoetai.

Should a major asset failure have occured at the station, it would mean major disruption to the network, and ultimately to your power supply.

The outdoor switching station was originally installed in 1974:

  • The original 33kV outdoor switchgear was outdated – if it failed, it would be major, and replacement or repair would have been difficult and time-consuming, leading to significant outages in the area
  • The existing outdoor yard was exposed to faults from external factors, such as birds, tree branches or possums – any fault on the 33kV circuit would have resulted in a full site outage
  • Constructed on steep terrain, the site was at risk of damage after heavy rainfall or storms

The solution

Investment of $3.8m to replace our 33kV Greerton switching station with a new indoor 33kV switchboard.  The project included:

  • Site works, and construction of a new switch room building, replacing the outdoor 33KV switchgear with an indoor switchboard
  • New switchgear which is environmentally safe
  • Natural disaster proof protection – the new installation was designed to modern seismic standards, and will offer protection against slips.

The benefit

An enhanced power supply to the Tauranga region – greater flexibility of electricity supply, and modern equipment means the network is more resilient to unplanned outages. This means minimising disruption business and residential communities.

Milestones

Construct new substation building

The first part of the South Waikato Grid Connection project is to replace the building - which doesn’t meet earthquake resilience standards - and upgrade the equipment at the Putaruru substation.

Route for new circuit between Arapuni and Putaruru confirmed

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Planned power cut during this period

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Construction of the circuit and new transformer at Putaruru substation

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2020
2020
June 2020
July 2020

UPDATES

Find out the latest updates about this project

FAQ

We strive to minimise impact in the design and placement of network infrastructure and we’re still planning and consulting on the route for the new circuit. The circuit will be a mix of overhead lines – which you will see, and underground cable – which you won’t see. You’ll also see a new building at our Putaruru substation, replacing the ageing existing building there.

We can never guarantee supply 100% of the time, however, the number and length of outages you experience will be reduced.  

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Downloads

2020

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