... control, mixture control, fast-slow speed shift to multi dual speed motor and triphase asynchronous inductive motor The switch is configured into KJ254 mining ... /1140(660)-4(6.8.9.10.11.12)Disk Type QJZ1-2000/1140(660)-4(6.8.9.10.11 ... ,11,12StructureContactor: the control box is type of drawerRated Voltage(V)1140,660 Control modesSingle motor-single speed,double motor-single speed,single motor ...