The project will consist of 124 Siemens turbines, with a unit of South Korea's CS Wind supplying towers.
The project is set for completion in spring 2014.
Samsung Renewable Energy, a division of the giant Korean conglomerate, agreed in 2010 to invest C$7bn in renewable projects in Ontario.
South Kent is the first of four wind farms totalling 870MW that it is developing with Pattern in the province.
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