Table 3: Mechanical and Electrical Works in the Powerhouse – Lots 4 and 5 Feature Dimension/Quantity Unit Francis Turbines 4 No. Minimum net head 120.0 m Maximum net head 162.8 m Unit Design Head 155 m Power output at maximum net head 75.0 MW Manufacturer – Dongfang China Generators and auxiliary systems 4 No. Stator core inner diameter 5,500 mm Shaft diameter 750 mm Rated output with class F temperature rises 86.7 MVA Rated voltage 13.8 kV Rated power factor 0.9 p.u.