As one of our key corporate objectives, TransGrid aims to achieve a high standard of reliability of supply, while providing a safe environment for the public.
To achieve this, we determine the scope and frequency of transmission line inspections and maintenance by considering the surrounding environment.
Types of transmission line inspections include:
- Aerial inspection;
- Climbing inspection;
- Ground inspection;
- Foundation inspection; and
- Underground inspection.
Vegetation control and easement maintenance
The maintenance of safe clearances between conductors and vegetation is very important to remove the risk of lines causing bushfires, making sure the public is safe and maintaining high levels of system reliability.
Also, easements and access tracks need to be maintained in a condition which allows for both regular planned visits and emergency repairs.
TransGrid specifies the requirements for vegetation control within an easement, maintenance of access tracks and also places restrictions on the lighting of fires in the vicinity of lines. These requirements are in line with the Energy Services Corporations Act, Rural Fires Act and agreements with the relevant government authorities.
Aerial inspections
Occasionally helicopters can be seen flying close to our powerlines. These aerial patrols are a regular part of our maintenance program, allowing necessary maintenance and inspection work to be carried out without 'switching off' sections of the high-voltage network.
Public announcements are usually made before aerial inspections begin.