September 4 (SeeNews) - Croatian company Koncar – Engineering (KET), a fully-owned subsidiary of local electrical equipment manufacturer Koncar Elektroindustrija [ZSE:KOEI], said on Monday it signed a new contract with German holding company Joh. Achelis & Sohne GmbH for the partial rehabilitation of the Ruzizi 2 hydro power plant in the Democratic Republic of the Congo.