Marathon 20 HP General Purpose Motor, 3 phase, 3600 RPM, 575 V, 256T Frame, TEFC - U650A

Catalog #:U650A
Part #:256TTFC6006
  • Meets or exceeds NEMA Premium efficiencies
  • NEMA Premium models are in compliance with EISA 2007
  • Rolled steel C-face models are Hazardous Duty Division 2 motors
  • Division 2 / Zone 2 Class I (gases), Groups A, B, C, D
  • Inverter duty 10:1 variable torque and 10:1 constant torque
  • 1.15 service factor on sinewave, 1.0 service factor on IGBT power
  • Meets temperature code T2B
  • Class F insulation
  • Standard assembly F1, reversible to F2 assembly
  • UL recognized, CSA certified and CE mark
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General Specifications

Weight: 346 LB Packaged Length: 27 IN
Packaged Width: 20.5 IN Packaged Height: 18 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60 Hz Voltage: 575 V
Current: 18.4 A Speed: 3550 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 92.4 % Power Factor: 88.5
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: 6308
UL: Recognized CSA: Y
CE: Y IP Code: 43

Technical Specifications

Electrical Type: Squirrel Cage Induction Run Starting Method: Across The Line
Poles: 2 Rotation: Reversible
Resistance Main: .295 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: 23.19 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)
2/3 120.00 522.0 79.00 263.0 2,400 20.00
Locked-Rotor 145.00 630.0 75.00 250.0 0 20.00
Pull-Up 130.00 565.0 67.50 225.0 1,800 20.00
Break-Down 95.00 413.0 81.50 272.0 3,450 20.00
1/3 140.00 609.0 64.00 213.0 1,200 20.00
Full Load 23.00 100.0 30.00 100.0 3,550 20.00
No Load 5.40 23.0 0.00 0.0 3,600 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 4.32 6.48 10.16 14.16 18.40 21.20 23.20
Rated Output (KW) 0.40 4.30 8.30 12.30 16.30 18.70 20.50
Efficiency (%) 0.0 87.5 91.7 92.4 92.4 91.7 91.7
Power Factor (%) 10.0 67.5 82.0 87.5 88.5 88.0 88.0
Speed (RPM) 3,600 3,590 3,578 3,565 3,550 3,545 3,540
Temp. Rise @ FL 0.0 0.0 0.0 0.0 60.0 80.0 95.0
Torque (ft-lbs) 0.00 7.50 15.00 22.50 30.00 34.50 37.50
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