Central Park–Wilton 'B' Reconductoring Project

Region Map
Central Park-Wilton 'B' line
Line length
Project completion

We need to continually operate, maintain and develop New Zealand's transmission network - the National Grid - to ensure we meet the ongoing electricity needs of New Zealanders.

We have identified that the Central Park–Wilton 'B' transmission line in Wellington will require its conductor (ie wire) replaced by 2020.  This line not only helps provide supply to Wellington CBD and southern suburbs, but also connects to the West Wind Generation station.



What are we doing

After considering options over 2015/16, we are proposing to replace most of the existing conductor on our Central Park–Wilton 'B' 110 kV line that connects between our Wilton and Central Park substations.  The new conductor will be strung in simplex configuration compared to the existing duplex configuration.  We expect to begin and complete work in 2019.  This project does not include the restringing of the final few line spans into our Central Park substation which is strung with a different conductor type and not showing the same signs of corrosive wear and tear.


Why we're doing it

Central Park–Wilton 'B' transmission line experiences heavy salt corrosion and high winds due to being close to the exposed Wellington southern and western coasts.  Deterioration of the conductor has reached a point where replacement in the near future is required in order to continue to provide a safe transmission service.