Our assets include transmission lines, high voltage underground cables, substations, switching stations, and digital infrastructure. Together, these assets form part of our high voltage transmission network that transfers electricity to more than three million households and businesses across NSW and the ACT.
Transmission lines and high voltage underground cables
A transmission line transmits electricity across vast distances.
It consists of a structure supporting conductors in the air, which are located at a safe distance from the ground. The structures are either steel towers or poles made of steel, concrete or wood.
Each conductor is connected to a string of insulators that either suspend or terminate the conductor at the structure. The insulators provide the required insulation to stop electricity leaking into the structure and then onto the ground.
Electricity is also transmitted into areas with high population density through high voltage underground cables. This ensures electricity is safely and reliably transmitted to major urban areas.