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256THFNA19056 – Marathon 20 HP Severe Duty Motor, 3 phase, 1800 RPM, 460 V, 256T Frame, TEFC – W553-P

256THFNA19056 – Marathon 20 HP Severe Duty Motor, 3 phase, 1800 RPM, 460 V, 256T Frame, TEFC – W553-P

256THFNA19056 Marathon Other Severe Duty Motors

Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.

  • Meets or exceeds NEMA Premium® efficiency. Model is in compliance with EISA2007
  • Meets IEEE-841 standard for severe duty applications
  • Bearing Current Protection (BCP)
  • Blue Chip® quality, 100% cast iron construction for rigidity and reduced vibration
  • Inpro/Seal® VBX® bearing isolators on drive end shaft extension TENV and on both ends of TEFC
  • Provisions to add stub shaft for an encoder (182T-449T, TEFC only)
  • Internal and external epoxy finish
  • MAX GUARD® Class F insulation system
  • Constant Torque speed range is listed in CT SPEED RANGE column
  • C-face addition may result in non-NEMA “BA” dim. For new “BA” dim consult chart found in modification section

Marathon Motors
Regal Beloit

Original price was: $5,147.00.Current price is: $3,668.78.

Description

256THFNA19056 – Marathon 20 HP Severe Duty Motor, 3 phase, 1800 RPM, 460 V, 256T Frame, TEFC – W553-P

256THFNA19056 Marathon Other Severe Duty Motors

Please advise CFM, static pressure, voltage, phase, and/or horsepower on specifications, drawings, or existing equipment for an accurate quote.

General Specifications

UPC: 722856021274 Weight: 345 LB
Packaged Length: 30.75 IN Packaged Width: 21.75 IN
Packaged Height: 18 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60 Hz Voltage: 460 V
Current: 24.1 A Speed: 1775 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 93 % Power Factor: 84
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: G
Frame: 256T Enclosure: Totally Enclosed Fan Cooled
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6309 Opp Drive End Bearing Size: 6210
UL: Recognized CSA: Y
CE: Y IP Code: 56

Technical Specifications

Electrical Type: Squirrel Cage Inverter Rated Starting Method: Line Or Inverter
Poles: 4 Rotation: Reversible
Resistance Main: .474 Ohms Mounting: Rigid base
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: T Overall Length: 25.40 in
Frame Length: 12.25 in Shaft Diameter: 1.625 in
Shaft Extension: 4.2 in Assembly/Box Mounting: F1/F2 CAPABLE

Speed Characteristics

Curvepoint Current (Amps) Current (%) Torque (ft-lbs) (%) Speed (RPM) Rated Output (KW) Power Factor (%) Rated Output (Hp)
Break-Down 86.00 357.0 146.00 247.0 1,625 66.0 20.00
No Load 8.50 35.0 0.00 0.0 1,800 20.00
Full Load 24.10 100.0 59.20 100.0 1,775 20.00
Pull-Up 115.00 477.0 100.00 169.0 900 20.00
Locked-Rotor 138.00 573.0 105.00 177.0 0 40.0 20.00
2/3 105.00 436.0 115.00 194.0 1,200 20.00
1/3 125.00 519.0 90.00 152.0 600 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 8.50 10.50 14.00 18.50 24.10 27.00 30.00
Rated Output (KW) 0.60 4.00 8.00 12.00 16.00 18.00 20.50
Efficiency (%) 0.0 90.0 93.0 93.6 93.0 92.4 91.7
Power Factor (%) 8.5 51.0 72.0 81.0 84.0 84.5 85.0
Speed (RPM) 1,800 1,795 1,785 1,780 1,775 1,770 1,760
Temp. Rise @ FL 0.0 0.0 0.0 0.0 65.0 85.0 105.0
Torque (ft-lbs) 0.00 14.50 29.50 44.50 59.20 68.00 74.50

Marathon Motors
Regal Beloit

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