ENGIE Brasil formerly Tractebel Energia is a major Brazilian utility company, headquartered in Florianópolis, Santa Catarina.

Its 11 plants, six of them hydroelectric and the remainder thermal, have an installed capacity of 9,000 MW.

The company originated as Gerasul, short for Centrais Geradoras do Sul do Brasil SA ('Power plants of the South of Brazil' in English) which was sold to Tractebel by Brazil's Eletrosul in 1998.

Gerasul held Eletrosul's power generation assets in the southern Brazilian states of Santa Catarina, Rio Grande do Sul, Paraná and Mato Grosso do Sul.

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