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256TTTNA16544 – Marathon 20 HP Severe Duty Motor, 3 phase, 1800 RPM, 230/460 V, 256TV Frame, TEAO – U1872

256TTTNA16544 – Marathon 20 HP Severe Duty Motor, 3 phase, 1800 RPM, 230/460 V, 256TV Frame, TEAO – U1872

256TTTNA16544 Marathon Low Voltage NEMA Cooling Tower 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
  • Blue Chip® quality, 100% cast iron construction for rigidity and reduced vibration
  • Internal and external epoxy paint
  • MAX GUARD® Class F insulation system
  • 1.15 Service Factor on sinewave, 1.0 Service Factor on IGBT power
  • Rated 60/50 hertz, 190/380 or 380 volt at next lower horsepower
  • Extended grease tubes, regreasable in service
  • T-drains provided for effective drainage (Installed in both endshields)
  • Suitable for all angle mounting
  • Suitable for 20:1 VT and 20:1 CT on VFD

Marathon Motors
Regal Beloit

Original price was: $7,473.00.Current price is: $4,366.16.

Description

256TTTNA16544 – Marathon 20 HP Severe Duty Motor, 3 phase, 1800 RPM, 230/460 V, 256TV Frame, TEAO – U1872

256TTTNA16544 Marathon Low Voltage NEMA Cooling Tower Motors

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

General Specifications

UPC: 722856132246 Weight: 363 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: 60/50 Hz Voltage: 230/460 V
Current: 48.0/24.1 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: 256TV Enclosure: Totally Enclosed Air Over
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6309 Opp Drive End Bearing Size: 6210
UL: Recognized CSA: Y
CE: N IP Code: 56

Technical Specifications

Electrical Type: Squirrel Cage Inverter Rated Starting Method: Line Or Inverter
Poles: 4 Rotation: Reversible
Resistance Main: .475 Ohms Mounting: Rigid base
Motor Orientation: Horizontal Or Up Or Down Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: T Overall Length: 22.35 in
Frame Length: 12.25 in Shaft Diameter: 1.625 in
Shaft Extension: 4.25 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)
No Load 8.50 35.0 0.00 0.0 1,800 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
Pull-Up 115.00 477.0 100.00 169.0 900 20.00
Break-Down 86.00 357.0 146.00 247.0 1,625 66.0 20.00
Full Load 24.10 100.0 59.20 100.0 1,775 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 90.2 92.4 93.0 93.0 92.4 91.7
Power Factor (%) 8.0 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 0.0 0.0 0.0
Torque (ft-lbs) 0.00 14.50 29.50 44.50 59.20 68.00 74.50

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!!!