Marathon 20 HP General Purpose Motor, 3 phase, 3600 RPM, 575 V, 256T Frame, TEFC - GT1124

Catalog #:GT1124
Part #:256TTFCA6005
  • Meets or exceeds NEMA Premium® efficiency. Model is in compliance with EISA2007
  • Cast iron frame and brackets
  • Inverter Duty 10:1 Variable Torque and 10:1 Constant Torque
  • Class F Insulation
  • Standard assembly F1, reversible to F2 assembly
  • C-face addition may result in non-NEMA "BA" dim. For new "BA" dim consult chart found in modification section
  • Will become build-up item when current stock is gone
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Weight:344.00 LB

General Specifications

UPC: 722856001900 Weight: 344.00 LB
Packaged Length: 31.25 IN Packaged Width: 22.25 IN
Packaged Height: 18 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60 Hz Voltage: 575 V
Current: 18.5 A Speed: 3550 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 91 % Power Factor: 88
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: 6209 Opp Drive End Bearing Size: 6209
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: .345 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: 27.80 in
Shaft Diameter: 1.625 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 85.00 370.0 80.00 270.0 3,350 72.0 20.00
Pull-Up 130.00 565.0 42.00 140.0 1,800 20.00
1/3 135.00 586.0 42.00 140.0 1,200 20.00
Locked-Rotor 145.00 620.0 65.00 218.0 0 38.0 20.00
No Load 6.70 27.0 0.00 0.0 3,600 10.0 20.00
Full Load 23.00 100.0 29.60 100.0 3,550 88.0 20.00
2/3 120.00 522.0 45.00 152.0 2,400 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 5.44 7.36 10.40 14.40 18.40 21.20 23.20
Rated Output (KW) 0.75 4.50 8.50 12.40 16.40 18.80 20.50
Efficiency (%) 0.0 86.5 90.2 91.0 91.0 91.0 91.0
Power Factor (%) 10.0 59.0 79.0 85.0 88.0 88.5 89.0
Speed (RPM) 3,600 3,588 3,575 3,565 3,550 3,542 3,535
Temp. Rise @ FL 0.0 0.0 0.0 0.0 50.0 70.0 85.0
Torque (ft-lbs) 0.00 7.30 14.70 22.00 29.60 34.00 37.00
Catalog #:GT1124A
Part #:256TTFCD6005
List Price: $2,940.00
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