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Three-Phase : TEFC (IP55) - NEMA Premium Efficiency
Three-Phase : TEFC (IP55) - NEMA Premium Efficiency
 


Description
 
WEG's W21™ NEMA Premium motors meet or exceed all NEMA Premium and CEE requirements for energy efficiency.

These TEFC motors are built according to NEMA specifications and designed for operation in moist or dusty atmospheric conditions without affecting their useful life. Premium Efficiency WEG motors are tested according to IEEE 112 std., method 'B' and their efficiency values are certified by UL Labs (CSA C390) and NEMA MG1.12.53, both A and B Standards. These motors are NEMA Design 'B' and maintain exceedingly high breakdown and locked torque while providing the highest rated efficiency levels.
Technical Information
Applications
  • Chemical plants
  • Compressors
  • Pulp and paper mills
  • Crushers
  • Refineries
  • Pumps
  • Steel mills
  • Fans
  • Cement mills
  • Packaging equipment
Standard 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 labyrinth tachonite seal as standard)
  • All 3600RPM and 1800RPM motors are supplied with ball bearings as standard.
    Roller bearings are supplied as standard on frames above 404T, 1200RPM and 900RPM
  • 1045 heat treated and stress relieved carbon steel shaft (4140 for roller bearing 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' (Design B torque rating on nameplate can be re-plated for Design C)
  • Service factor:
     1.25 up to 100HP
     1.15 from 125HP and up
  • Continuous duty (S1)
  • 104ºF (40ºC) ambient temperature
  • Altitude: 3300 ft (1000m)
  • NPT threaded terminal box
  • F1 mount
  • Stainless steel nameplate AISI 316 with laser etching
  • Color: RAL 6002 (Green)
  • Automatic drain plugs - pressure compensated
  • Regreasable bearings positive pressure lubrication system (frames 254T and up)
  • Thermistors type PTC (1 per phase) from frames 324T and up
  • Continous flow Class 'H' resin insulation system
  • Gasketed conduit box
  • Roller bearing models available
  • MGI Part 31 rating for use with VFD - 4:1 constant torque speed range.
    Speed range can be extended with optional Blower kit
Optional Features
  • 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
NOTES

Motors are nameplated Class I Div. II Groups B, C and D .

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.


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