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GuardForce Max® fencing secures substation in world renowned wine country

GuardForce Max® fencing secures substation in world renowned wine country

13th Mar 2016

McLaren Flat 66/11kV Substation is located near the township of McLaren Flat in the McLaren Vale region. It contains one 12.5MVA 66/11kV transformer, and supplies approximately 1,300 customers who are predominantly residential, rural and agricultural including wineries. Following a risk assessment SA Power Networks (SAPN) decided to upgrade the chainwire fabric perimeter security fencing. Bluedog was successful in its tender to supply and install GuardForce Max® intruder resistant high security fencing system. The powder coated Intruder Resistant fencing was installed to prevent unauthorised access to the high voltage substation. The welded mesh perimeter was fitted with a manually operated sliding Vehicle Access (VA) gate to suit an 8 metre opening with an adjacent Personnel Access (PA) gate. The substation was operational throughout the works. Some of the project specific challenges included:

  • Installing the fence at the top of a batter on a raised 'bench'. The substantion is constructed on a raised deck where the ground tapers away some 500mm out from the fence alignment. This created issues that had to be overcome so that plant and equipment could be operated safely on the sloped surface.
  • Identifying underground services, including earth grading rings, in and around a high voltage substation.
  • Meeting delivery timeframes notwithstanding poor weather conditions.
  • Keeping the generation of dust to a minimum due to close proximity of McLaren Vale wine district vineyards

The feature and beneficial outcomes of the fence system used included:

Feature: 3000mm high welded mesh panel with 8.5mm aperture between 4mm horizontal wires.
Outcome: The fence if very difficult to scale, increasing the deter and delay security value of the fence resulting in lower incidence of unauthorised access and consequent financial loss.

Feature: The welded mesh fence maintains natural surveillance into the zone substation.
Outcome: The ability to see into the substation and detect unauthorised persons is maintained as compared to other fence types increasing the overall security value of the fence.

Feature: The 4mm horizontal and 5.6mm diameter vertical wires are 12.5mm centres and at 75mm centres respectively.
Outcome: The close spaced mesh is time consuming to cut through the panel without the aid of power tools thus increasing the security value of the fence.

Feature: The close spaced wires are coated with a zinc alloy coating.
Outcome: The wire is highly corrosion resistant and superior to a pure zinc coating thus the reducing whole of life cost of the fence.

Feature: The mesh panel is topped with a serrated rail.
Outcome: The topping further increases the deter and delay security value of the fence resulting in a lower incidence of unauthorised access and consequent financial loss.

Feature: The 100 universal column (UC) posts with slotted front flange and 50x50x6mm equal angle rails are hot dip galvanised after fabrication.
Outcome: The steel structure is highly corrosion resistant reducing whole of life cost.

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