41 1-800-ASK-4WEG NEMA Premium THREE-PHASE MOTORS - FEATURES and LIST PRICES W21 NEMA Premium Efficiency - General Purpose Motors - TEFC (IP55) ....................................................................................... 42 - ODP (IP21/IP23) ................................................................................ 46 INDEX - NEMA Premium Efficiency Endshields Made of cast iron, with external fins for heat dissipation. They also have polished bearing housings for longer bearing life Rotor Aluminum die cast into a magnetic steel lamination for low electric losses. Dynamically balanced for smooth operation, reduced vibration and noice. Fan Cover Steel covers on 143T up to 215T frames and cast iron on frames 254T and up. Fan Made of rigid plastic from frames 143T up to 326T and aluminum from frames 364T up to 586/7. Non sparking, non toxic, resistant to environmental conditions, and ensures low noise operation. Frame Made of FC-200 cast iron, with external fins for maximum cooling effect. Eyebolt For easy handling, motors 184T frames and larger are provided with an eyebolt. Footless motors are provided with two eyebolts. Shaft Made of ASTM 1045 carbon steel. It is thermally treaded to minimize internal stress, to resist bending and fatigue caused by torsion and flexing. Roller bearings motors use 4140 alloy steel for extra torsional strength on applications. Terminal Box Oversized, cast iron construction. Gasketed lid and between box and frame. NPT threads holes to connect conduit or cable glands. Winding All copper winding wire enameled with class “H” polyester varnish. The winding is insulated on stator slots and between the coil phase with class “H” insulating materials of high dielectric rigidity and solvent free polyester resin excellent mechanical resistance. Nameplate Stainless steel nameplate contains a complete and permanent record of all motor data (according to NEMA requirements. V-Ring Slinger In both endshields to protect bearings and motor from the aggressive components present in the environment. Drain Plugs Provided with automatic drain plug that quickly drains condensation. Bearings All 3600RPM and 1800RPM motors are supplied with ball bearings as standard. Roller bearings are supplied on frames above 404T, 1200RPM and 900RPM. The bearings are dimensioned to ensure long life to the motor, even under heavy working conditions. Positive pressure lubrication system includes a drain plug that allows the outflow of excess grease on 254T frames up to 586/7. Stator Made of silicon steel laminations thermochemically treated to improve the electric characteristics, reducing electric losses and the operating temperature. Meets or exceeds CEE Standards
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NEMA Premium - General Purpose · Roller bearings motors use 4140 alloy steel for ... GENERAL PURPOSE MOTORS ... 900 256T 00709ET3E256T N1 302 11.7 86.9 24.945 208-230/460V
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411-800-ASK-4WEG
NE
MA
Pre
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THREE-PHASE MOTORS - FEATURES and LIST PRICES
W21 NEMA Premium Efficiency - General Purpose Motors
EndshieldsMade of cast iron, with externalfins for heat dissipation.They also have polished bearinghousings for longer bearing life
RotorAluminum die cast into a magnetic steellamination for low electric losses.Dynamically balanced for smooth operation,reduced vibration and noice.
Fan CoverSteel covers on 143T up to 215Tframes and cast iron on frames254T and up.
FanMade of rigid plastic from frames143T up to 326T and aluminumfrom frames 364T up to 586/7.Non sparking, non toxic, resistantto environmental conditions, andensures low noise operation.
FrameMade of FC-200 cast iron, with external fins formaximum cooling effect.
EyeboltFor easy handling, motors 184Tframes and larger are providedwith an eyebolt. Footless motorsare provided with two eyebolts.
ShaftMade of ASTM 1045 carbon steel. It isthermally treaded to minimize internal stress, toresist bending and fatigue caused by torsionand flexing.Roller bearings motors use 4140 alloy steel forextra torsional strength on applications.
Terminal BoxOversized, cast iron construction.Gasketed lid and between box and frame.NPT threads holes to connect conduit orcable glands.
WindingAll copper winding wire enameled with class “H”polyester varnish. The winding is insulated on statorslots and between the coil phase with class “H”insulating materials of high dielectric rigidity andsolvent free polyester resin excellent mechanicalresistance.
NameplateStainless steel nameplatecontains a complete andpermanent record of all motordata (according to NEMArequirements.
V-Ring SlingerIn both endshields toprotect bearings and motorfrom the aggressivecomponents present in theenvironment.
BearingsAll 3600RPM and 1800RPM motors are supplied withball bearings as standard. Roller bearings are suppliedon frames above 404T, 1200RPM and 900RPM. Thebearings are dimensioned to ensure long life to themotor, even under heavy working conditions. Positivepressure lubrication system includes a drain plug thatallows the outflow of excess grease on 254T frames up to586/7.
StatorMade of silicon steel laminationsthermochemically treated toimprove the electric characteristics,reducing electric losses and theoperating temperature.
Meets or exceeds
CEE Standards
Kay Cylkowski
www.wegelectric.com42
NE
MA
Prem
ium
NEMA PREMIUM EFFICIENCY - GENERAL PURPOSE MOTORS - IPW55 (TEFC)
WEG’s W21TM NEMA Premium motors meet or exceed all NEMA Premium andCEE requirements for energy efficiency.
These TEFC motors are built according to NEMA specifications and designedfor operation in moist or dusty atmospheric conditions without affecting theiruseful life. Premium Efficiency WEG motors are tested according to IEEE 112std., method ‘B' and their efficiency values are certified by UL Labs (CSAC390) and NEMA MG1.12.53, both A and B Standards.These motors are NEMA Design ‘B’ and maintain exceedingly high breakdownand locked rotor torque while providing the highest rated efficiency levels.
Three Phase - Foot Mount
Applications Standard Features• Chemical plants• Compressors• Pulp and paper mills• Crushers• Refineries• Pumps• Steel mills• Fans• Cement mills• Packaging equipment
Optional Features
• Three-phase, II, IV, VI and VIII pole, 60Hz• Voltage: 208-230/460V, 200V, 460V or
575V• Totally Enclosed Fan Cooled - TEFC
(IP55) water tight and dust tight enclosure• Squirrel cage rotor / Aluminum die cast• V-ring slingers on both endshields
(586/7 frame equipped with labyrinthtachonite seal as standard)
• All 3600RPM and 1800RPM motors aresupplied with ball bearings as standard.Roller bearings are supplied as standardon frames above 404T, 1200RPM and900RPM
• 1045 heat treated and stress relievedcarbon steel shaft (4140 for rollerbearing motors)
• NEMA dimensions• Class ‘F’ insulation for all frames - all
insulation materials are class ‘H’ (180oC)except motor leads (Class ‘F’)
• Temperature rise: Class ‘B’ (80oC)• NEMA Design ‘B’*• Service factor: 1.25 up to 100HP
1.15 from 125HP and up
• Special voltages• Specially designed shaft• Space heaters (standard on 586/7
frames)• Thermostats or RTD’s (PT100)• Additional terminal box• Drip cover (canopy) for shaft down
applications• Cable glands• ‘C’ and ‘D’ flanges for all ratings• Roller bearings on drive end
available for all frames• Labyrinth tachonite seal available on
all ratings
APPROVED BY
LR 38324
Note: Motors are nameplated Class I Div. II Groups B, C and D and Class F components from frames 364T and up
* Design B torque rating on nameplate can be re-plated for Design C
All motors are tested according to IEEE 112 std. - method ‘B’ or C390 CSA
All WEG motors are energy efficiency verified by UL in addition to the DOE.E 104590
ALSO ENERGY VERIFIEDCSA C390-93
• Continuous duty (S1)• 104oF (40oC) ambient temperature• Altitude: 3300 ft (1000 m)• NPT threaded terminal box• F1 mount• Stainless steel nameplate AISI 316 with