Baldor-Reliance Motor, 50HP,1775RPM,3PH,60HZ,326T,4256M,OPSB,F2Features:Heavy duty framesBall bearingsMoisture resistant ISR® (Inverter Spike Resistant) copper windingsLow-loss electrical lamination grade steelThree year warranty.Typical Applications:Typical applications include operations where continuous or frequent duty is required. Super-E Motors are designed to conserve energy over extended time periods. Inverter rated per NEMA MG1 Part 31.4.4.2. Suitable for variable torque applications and 20:1 constant torque speed range with properly sized and adjusted variable frequency drives. Product Specifications HORSEPOWER50 ENCLOSUREOPSB FRAME326T MOUNTINGRigid NAMEPLATE RPM1775 PHASE3 MOTOR RPM 60Hz1775 VOLTAGE230/460 HERTZ60 SERVICE FACTOR1.15 AMBIENT TEMP C40 WEIGHT472 RPM RANGE1701-1800 DESIGN CODEB BEARING-DRIVE-END6312 BEARING-OPP-DRIVE-END6311 FL EFFICIENCY94.5 INSULATION CLASSF FL AMPS114/57 KVA-CODEG 208V AMPS121 BRANDBaldor-Reliance DOE-CODE010A MANUFACTURER PART #EFM2543T CUSTOMER-PART-NUMBER-- is_motorYes GREASEPOLYREX EM ENCLOSURE TYPEOpen/Drip Proof SPACE-HEATER-AMPS-- SPACE-HEATER-VOLTS-- MAX. SPACE HEATER TEMP.-- POWER-FACTOR87 DRIVE END FLANGEStandard SERIAL-NUMBER-- C-DIMENSION INCHES27.69 POLES4 SPEC. NUMBER42E214W387