... set 9. drive system 1 set 10. electric control device 1 setIV.Structural specifiction and technical parameter for ... system includes main motor, major speed reducer, transmission shaft underground, shaft coupling, protective housing, etc.8. Electric control system (1 ... 3-phase and 5-line, 380V(+ 10%), 50HZ (2)main control adopts electromagnetic speed-adjustable device, with easy operation and operation ...