... ~449T4,Output Range:2~208HP.5,Synchronous Speed:1200RPM(6 Poles 60Hz),1000RPM(6 Poles 50Hz),900RPM(8 Poles 60H),750RPM(8 ... Poles 50Hz).6,Rated frequency:60Hz(50Hz is availiable on request)7,Rated ... relative position of conduit box are follows: NEMA D motor for oilwell pump with high quality