Low Voltage

Optim TEFC

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NEMA Standard 3-Phase Motors
60Hz, 230/460V, 460V or 575V
NEMA Design B or C, Continuous Duty
Class F Insulation, 40°C Ambient, 1.15 S.F.
HPE™ Inverter Duty Wire

The Optim® TEFC is a state-of-the-art machine designed to meet the diverse requirements of the modern industrial world. Backed by a three-year warranty, this unit offers premium efficiency ratings that deliver significant life-cycle savings.

Couple your Optim® TEFC with our TECO VFD’s for energy savings & speed control. TWMI offers a variety of industrial and commercial drive solutions.

Price Catalogue
  • 1-800HP
  • Totally Enclosed Fan Cooled IP54 Design, IP55 for 5000 Frames and Larger
  • 60Hz, 230/460V, 460V or 575V
  • Horizontal F1 Mount
  • 3600, 1800, 1200 & 900 RPM
  • NEMA Premium Efficiency
  • 1.15 S.F. Sine Wave Power; 1.0 S.F. VFD Power
  • Class F Insulation
  • Class B Temperature Rise
  • Max Elevation 3300ft
  • Continuous Duty
  • 40°C Ambient
  • Shielded Bearings Frames 140T-280T and Open Bearings with Regreaseable Provisions Frames 280TS, 320T and Larger
  • Polyrex EM Grease in all Regreaseable Bearings, Multemp SRL Grease in Shielded Bearings
  • Aluminum Rotor up to 5000 Frames; Copper/Copper Alloy 5800 and Larger
  • Cast-Iron Frame and End Brackets
  • Cast-Iron Conduit Box up to 449T Frames; Fabricated Steel Conduit Box 5000 Frames and Larger
  • Non-Sparking Plastic Fan up to 449T 4,6 & 8 Pole Motors; Bronze Fan 440TS 2 Pole Motors; Aluminum Fan 5000 Frames and Larger
  • Number of Leads 230/460V: 9 Leads 1-5HP; 12 Leads 7.5-125HP; 6 Leads 150 and Above
  • Number of Leads 575V: 3 Leads up to 449T; 6 Leads 5000 Frames and Larger
  • Solderless Lug Terminals on All Leads


  • Grounding Terminal Inside Main Terminal Box, Additional Grounding Terminal on Frame for 5000 Frames and Larger
  • Interchangeable F1 and F2 mounting up to 449T
  • Dual Drilled Feet for Longer Frames (i.e. 145T also Drilled for 143T) 449T and Below
  • Paint System: Phenolic Rust Proof Base with Lacquer Top Coat
  • Stainless Steel Nameplate
  • Insulated NDE Bearing Standard for 600HP and Larger (2 Pole Motors Only)
  • Rubber Flinger on DE up to 280T; Steel Flinger on Both Ends 280TS and Larger
  • *HPE™ High Pulse Endurance Spike Resistant Wire
  • 2 Dips Phenolic Alkyd Resin Varnish 140T-440T, 2 Dips Epoxy Resin 5000 Frames and Larger; Spray Enamel Top Coat on all Frames
  • Bi-Directional Rotation Except 3600RPM Motors 5000 Frames and Larger Which are CW From NDE
  • Winding RTD’s, Space Heaters and Provisions for Bearing RTD’s Standard 5000 Frames and Larger
  • CSA Certified for Class I, Division 2, Groups B, C & D (Class I, Zone 2, Groups IIB+H2, IIB and IIA)
  • CSA Certified Class II, Division 2 (Class II, Zone 22) available for 440 Frames and larger upon request
  • *Speed Ranges up to 10:1 CT, and 20:1 VT. Refer to data sheet for rating specific turn down ratios
  • *Meets NEMA MG1 Part

* Precautions should be taken to eliminate or reduce voltage spikes and shaft currents that may be imposed on the motor by the VFD as stated per NEMA MG1, Part 31.4.4.

Price Catalogue

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Price Catalogue