The transformers will arrive on Wednesday and Friday and will be transported on a single semi-trailer as an over-sized load under escort.

Due to their size and the transport route through rural roads, the transformers cannot be moved at night.

The convoy will depart from Ballarat early on Wednesday and Friday morning en-route to wind farm site.

The transporters will not pass through Ararat but rather turn off the highway at the Buangor-Ben Nevis road and continue through Warrak to the site entrance.

The transformers, procured via a $4-million contract with Victorian-based Wilson Transformer Company, are over eight metres in length, 4.5-metres wide and seven metres high when fully assembled.

The transformers weigh approximately 96-tonnes each (disassembled) and upon arrival at site they will require a further two prime-movers to manoeuvre them through the undulating landscape of the project area.

With the two trailers, the combined weight of the unit will exceed 140-tonnes.

It will take up to two hours to get them from the site entrance on Warrak Road to the substation, a distance of approximately three kilometres.

The purpose-built power transformers will be installed at the wind farm electrical substation to convert the 33-kilovolt farm electrical collector network to 132-kilovolts for transmission to the electricity grid at Elmhurst.

The transformers were manufactured and tested in Glen Waverley. 

The Ararat Wind Farm construction is a joint venture between GE and Downer. 

The 240-megawatt wind farm will be the third largest in Australia.

The project also benefits from a power purchase agreement with the Australian Capital Territory government, guaranteeing the purchase of approximately 40 per cent of the energy produced at the site.

The wind farm will produce enough electricity to power around 120,000 homes per annum.