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256TTFNA16825 – Marathon 20 HP General Purpose Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256 Frame, TEFC – U2140A

256TTFNA16825 – Marathon 20 HP General Purpose Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256 Frame, TEFC – U2140A

256TTFNA16825 Marathon General Purpose Pump Three Phase Motors

  • Class F insulation
  • 50Hz Voltages at next lower HP
  • Rolled Steel and Cast Iron
  • NEMA Design B
  • 10:1 Constant Torque
  • 1.15 Service Factor on sinewave or 1.0 Service Factor on IGBT power
  • 254TYZ and larger frames IP55 Standard with (IP-56 as a factory modification)

Marathon Motors
Regal Beloit

Description

256TTFNA16825 – Marathon 20 HP General Purpose Pump Motor, 3 phase, 3600 RPM, 230/460 V, 256 Frame, TEFC – U2140A

256TTFNA16825 Marathon General Purpose Pump Three Phase Motors

General Specifications

UPC: 722856054524 Weight: 453 LB
Packaged Length: 39 IN Packaged Width: 32.25 IN
Packaged Height: 22.01 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60/50 Hz Voltage: 230/460 V
Current: 47.0/23.4 A Speed: 3537 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 92.4 % Power Factor: 86
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: G
Frame: 256 Enclosure: Totally Enclosed Fan Cooled
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6312 Opp Drive End Bearing Size: 6210
UL: Recognized CSA: Y
CE: Y IP Code: 55

Technical Specifications

Electrical Type: Squirrel Cage Inverter Rated Starting Method: Line Or Inverter
Poles: 2 Rotation: Reversible
Resistance Main: .394 Ohms Mounting: Rigid Base
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: Hyd Pump Adaptor Shaft Overall Length: 23.09 in
Frame Length: 12.25 in Shaft Diameter: 1.75 in
Shaft Extension: 4 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 100.00 427.0 84.00 283.0 3,155 67.0 20.00
Full Load 23.00 98.0 29.70 100.0 3,535 20.00
2/3 123.00 526.0 58.00 195.0 2,400 20.00
No Load 7.00 30.0 0.00 0.0 3,600 20.00
Pull-Up 131.00 560.0 50.00 168.0 1,800 20.00
Locked-Rotor 145.00 620.0 55.00 185.0 0 37.0 20.00
1/3 138.00 590.0 47.00 158.0 1,200 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 7.00 9.00 13.00 18.00 23.40 26.00 29.50
Rated Output (KW) 0.50 4.00 8.00 12.00 16.50 18.00 20.50
Efficiency (%) 0.0 87.5 91.0 91.7 92.4 91.7 90.2
Power Factor (%) 10.5 58.5 78.0 85.0 86.0 87.0 88.5
Speed (RPM) 3,600 3,585 3,570 3,555 3,537 3,525 3,515
Temp. Rise @ FL 0.0 30.0 25.0 0.0 55.0 75.0 0.0
Torque (ft-lbs) 0.00 7.50 15.00 22.00 29.70 31.00 37.50

Marathon Motors
Regal Beloit

Winter Weather Notice:

Our sales office and customer service teams may be disrupted on January 9th, 2025 due to a Severe Winter Weather advisory in their area. We apologize for any potential delays or disruptions this may pose to you and we appreciate your patience during this event.

 

In the meantime, please feel free to reach out to us for any quotes, questions, or concerns and we will do our best to respond in a timely manner – orders will still be processed normally.

Thanks!

Holiday Hours of Operation:

Our warehouses will be closed 12/24/2024-01/01/2025:

Our Sales Office will remain open with limited hours during this time and will continue to process orders – all shipments will resume on 01/02/2025 – feel free to purchase from our shop or contact us for quotes as usual.

*FYI: If you’ve placed an order with us before 12/24/2024, we are currently experiencing delays in manufacturing/shipping and are working hard to provide updates and complete fulfilment as quickly as possible – we thank you for your business and your patience*

Happy Holidays from IMEX!!!