Aurora Motors

Offering Aurora Motors NEMA Premium-Efficiency T-Frame Motors

184T-284T IN-Stock

Available for Immediate Shipment

Model Description
4TEP184T-5 5 hp, 184T frame, 1800 rpm 3 ph, 208-230/460V TEFC
4TEP215T-10 10 hp, 215T frame, 1800 rpm 3 ph, 208-230/460V TEFC
4TEP254T-15 15 hp, 254T frame, 1800 rpm 3 ph, 208-230/460V TEFC
4TEP256T-20 20 hp, 256T frame, 1800 rpm 3 ph, 208-230/460V TEFC
4TEP284T-25 25 hp, 284T frame, 1800 rpm 3 ph, 208-230/460V TEFC
Aurora Motor NEMA Premium Efficiency Logo

 Aurora Motor NEMA Premium Efficiency

T-Frame Motors

Horsepower 1-300 hp
Speeds 1200/1800/3600 RPM
Design Voltages 208-230/460V (380V available) / 60Hz (50Hz available)
Enclosures Totally Enclosed Fan Cooled
Efficiency Levels NEMA Premium Efficiency

Latest Technologies, Highest Quality

Aurora NEMA Premium Efficiency T-Frame Motors are three-phase induction, TEFC (Totally Enclosed Fan Cooled) squirrel-cage motors manufactured with the latest technologies. Our stator core is manufactured with high-quality laminated electrical steel. The high permeability and low loss of the steel enables Aurora frame motors to operate more efficiently.

Wide Range of Applications

The low-noise, low-vibration design of Aurora T-Frame Motors features advance cooling capabilities and makes these NEMA T-frame motors perfect for a variety of applications including compressors, ventilators, and pumps for petrochemical, medical, and mining environments.

Product Features

  • Frame sizes: 143T – 449T
  • Class “F” insulation (Class H available)
  • Ambient temperature: 40°C max
  • VPI treatment
  • Dynamically balanced rotor
  • Low rise, low vibration bearing
  • Steel or cast-iron fan cover
  • Laminated steel stator core
  • Continuous Duty (S1)
  • Rated frequency: 60 Hz (50Hz available)
  • Service factor: 1.15 or 1.0

Motors Made with High Quality Materials

Aurora T-Frame Motor stator windings use Class F insulation with polyimide enamel round wire and VPI treatment to provide strong mechanical support, superior electrical insulations, moisture and contamination resistance, and uniform heat dissipation. The conduit box is made of cast iron with Standard NPT threads in the opening.


  • Laminated, high permeability, low-loss electrical steel to boost efficiency
  • Class F insulation windings (Class H available)
  • Polyimide enamel round wire
  • VPI treatment
  • Embedded thermistors


  • Squirrel-cage type
  • Cast aluminum alloy
  • Dynamically balanced to reduce vibration

Bearing and Lubrication

  • Low-noise, low-vibration bearings
  • Frame 210: bilaterally shielded ball bearings without replenishing grease
  • Frame 250 or larger: open bearings with attachments to drain and replenish lubricating grease
    without stopping motor
  • No. 3 lithium base grease
  • Bearing design life is at least 40,000 hours at rated load

Conduit Box

  •  Located on central side
  • F1/F2 convertible
  • Cast iron
  • Grounding bolts and connection diagram inside
  • Terminal Blocks are available

Fan and Fan Cover

  • Fan available in plastic or cast iron
  • Fan cover available in sheet metal or cast iron

NEMA Premium Efficiency
Certified for use in Canadian and US
ISO 9001 Certification
EASA Member