Happy Valley transmission Connection Point & distribution zone substation

Gateway to the South

The Metropolitan South region of Adelaide extends from Keswick in the north, to Victor Harbor and Kangaroo Island in the south. This area is supplied by three 275/66kV transmission Connection Point substations; one of which is located at Happy Valley.

Why do we need to upgrade our Happy Valley infrastructure?  

By the end of 2011, ElectraNet and SA Power Networks will commission a new transmission Connection Point at Keswick, known as City West. This will also supply the Metropolitan South region of SA Power Networks' 66kV distribution network.

In order to safely connect the new City West Connection Point to the distribution network, SA Power Networks will upgrade its 66kV circuit breakers and protection equipment at the Happy Valley Connection Point, which is jointly used by SA Power Networks and ElectraNet.

The $11.2 million project will support further customer growth in the State's south as well maintain a safe and reliable power supply.

What did the Happy Valley project involve?

The upgrade of the Happy Valley Connection Point includes the following works:

  • New switchroom and associated civil works
  • 66kV line protection
  • Replacement of 66kV circuit breakers
  • Upgrade existing 11kV cabling between transformers and switchboard
  • Install associated telecommunications and remote monitoring equipment

In turn, SA Power Networks will also upgrade its Happy Valley 66/11kV distribution zone substation by summer 2011/2012. These works will include the installation of two new 11kV switchboards and two new station transformers.

What is the timeline?

SA Power Networks embarked on planning and design in 2010. On site construction commenced early 2011 and the project is scheduled for completion by mid-2012.