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20 HP, 1765 RPM, NEMA Frame 256TC, 230/460 V, TENV/TEBC

Applications:
Designed for inverter or vector applications where up to a 2000:1 constant torque speed range is required. Typical uses include: material handling, machine tools, conveyors, crane and hoist, metal processing, test stands, pumps, compressors, textile processing, and other industrial machinery installed in dusty or dirty environments.
Unit of Measure

Specifications

Base

 N/A Rigid Base

Usage

 N/A Inverter/Vector Duty

Enclosure Type

 N/A Totally Enclosed Blower Cooled Totally Enclosed Non-Ventilated

Phase

 N/A Three

HP

 N/A 20

RPM 60 Hz

 N/A 1765

Voltage

 N/A 230 V460 V

FL Amps 230 V

 N/A 52

NEMA Frame

 N/A 256TC

Disc. Sym.

 N/A C

C Dimension

 N/A 27.13 in

Approx. Weight

 N/A 435 lbs

Max. RPM

 N/A 4200

Frame Construction

 N/A Cast Iron

Manufacturer

 N/A
Leeson

Features

N/A

  • These motors are Totally Enclosed, Non-Ventilated (TENV) - Others are Totally Enclosed Blower-Cooled (TEBC).
  • These motors are Totally Enclosed, Non-Ventilated (TENV) - Others are Totally Enclosed Blower-Cooled (TEBC).
  • Class H inverter-rated IRIS™ insulation system
    Constant torque operation from 0 to base RPM rating on Vector Drives
  • Contact HP operation to twice base RPM rating for 143T-256T frame, 1.5 x base RPM for all other sizes
    Designed for optimum performance with IGBT inverters - not for across-the-line starting
  • C-face with rigid base through 100 HP
  • Normally closed thermostats (one per phase)
    Continuous duty at 40ºC ambient
  • 1.0 Service Factor (Class "B" rise on TEBC motors)
    Premium quality, cast iron frame and endbells 284T and larger are blower-cooled with a separately powered three-phase blower motor to provide added cooling at low speeds
  • Ball bearings (Roller bearings available 360-frame and larger)
  • Field convertible to F2 mounting
  • Encoder provisions included on opposite drive end
  • UL Recognized and CSA Certified
  • Three-year warranty
  • Meets NEMA MG1, parts 30 and 31