Details: Specifications: 1) Rated output: 3 to 50kW 2) Rated frequency: 50Hz 3) Rated speed: 1,500rpm 4) Rated voltage: 400V 5) Three-phase four-wire 6) Protection: IP21 or IP22 7) Insulation: class F/H 8) Standard: international electrician committee command standard IEC34, international standardization organization: command standard, ISO8528 NEMA standard 9) Engine can be connected with steel or flexible materials 10) Steel frame: cast-iron cover 11) Excellent silicone steel chip 12) Imported bearings. You can choose one bearing or two bearings Packing: Wooden case