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

Catalog #:U2140A
Part #:256TTFNA16825
  • 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)
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Weight:453.00 LB

General Specifications

UPC: 722856054524 Weight: 453.00 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 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
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