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841-2009 – IEEE Standard for Petroleum and Chemical Industry – Premium Efficiency, Severe Duty, Totally Enclosed Fan-Cooled (TEFC), Squirrel Cage Induction Motors – Up to and Including 370 kW (500 hp)

This standard applies to premium efficiency, totally enclosed fan-cooled (TEFC), horizontal and vertical, single-speed, squirrel cage polyphase induction motors, up to and including 370 kW (500 hp), and 4000 volts in National Electrical Manufacturers Association (NEMA) frame sizes 143T and larger, for petroleum, chemical, and other severe duty applications (commonly referred to as premium efficiency severe duty motors). Excluded from the scope of this standard are motors with sleeve bearings and additional specific features required for explosion-proof motors.

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WEG’s W22 NEMA Premium Motors meet or exceed all NEMA Premium® requirements for IEEE motors’ energy efficiency. These WEG IEEE 841 W22 NEMA Premium Efficiency Mill and Chemical Duty Motors are especially suited for Pulp and Paper Mills, Petrochemical, Steel Mills and applications requiring severe duty, long life motors.

ieee motors petrochem

Three Phase IEEE-841 Petrochem Motors NEMA Premium Effeciency

  • Three-phase, 2, 4, 6 or 8 pole, 60Hz
  • Voltage: 460 or 575V (3 wire)
  • Totally Enclosed Fan Cooled (TEFC)
  • Degree of Protection: IP55
  • Class “F” Insulation (“B” Temperature Rise at Full Load)
  • 104°F (40ºC) Ambient Temperature
  • Service Factor:
    – 1.25 – up to 100 HP
    – 1.15 – from 125HP and up
  • Squirrel Cage Rotor / Aluminum Die Cast
  • 143T up to 586/7 Cast Iron Frame
  • All Cast Iron Reinforced Construction:
    – Frame, Endshields, Terminal Box and Fan Cover
  • F1 Mounting