The suburb of Kaiti and the whole of the East Coast used to be dependent on the one 50kV line from the Gisborne substation - which meant any fault on that line could knock power out to the entire Coast.
As part of our asset management plan, our engineering team undertook major work at the Gisborne sub, splitting Kaiti and the Coast onto two different feeders. This halved the risk and doubled the security.
We reduced risk further by establishing a second line, so we now run two 50kV lines to Tokomaru Bay. This was commissioned on 12 December 2022 – just in time, as it turned out, for a very stormy summer.
Now, a single fault between Gisborne and Tokomaru Bay won’t affect the rest of the Coast. The value of this was shown during Cyclone Gabrielle, when we were able to bypass much of the major damage and restore power to many Coast communities within a relatively short period of time.
This has also improved our capacity for connections to solar and other forms of generation, will allow us to make further upgrades, and boosts long-term security for Tairāwhiti.