Marathon 20 HP Close-Coupled Pump Motor, 3 phase, 3600 RPM, 575 V, 256JM Frame, TEFC - GT3224A

Catalog #:GT3224A
Part #:256TTFCD6008
  • Meets or exceeds NEMA Premium® efficiency. Model is in compliance with EISA2007
  • Hazardous Duty Division 2, Zone 2, Class I, Groups A,B,C,D, Temperature code T2B
  • IP55 enclosure on cast iron frames
  • Inverter Duty 10:1 Variable Torque and up to 10:1 Constant Torque
  • Class F Insulation
  • Standard F1, reversible to F2 assembly. Dual frame mounting holes.
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Weight:312.00 LB
List Price: $3,725.00

General Specifications

UPC: 722856061584 Weight: 312.00 LB
Packaged Length: 31.77 IN Packaged Width: 28.03 IN
Packaged Height: 28.14 IN

Nameplate Specifications

Output HP: 20 Hp Output KW: 14.9 kW
Frequency: 60 Hz Voltage: 575 V
Current: 19.0 A Speed: 3540 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 91 % Power Factor: 87.5
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: G
Frame: 256JM Enclosure: Totally Enclosed Fan Cooled
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6309 Opp Drive End Bearing Size: 6209
UL: Listed 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: .546 Ohms Mounting: Rigid Base
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: JM Overall Length: 27.89 in
Frame Length: 11.73 in Shaft Diameter: 1.375 in
Shaft Extension: 5.75 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 83.00 350.0 74.00 249.0 3,258 73.0 20.00
Pull-Up 128.00 540.0 41.00 138.0 1,800 20.00
Full Load 23.70 100.0 29.70 100.0 3,540 87.5 20.00
No Load 8.10 34.0 0.00 0.0 3,600 9.0 20.00
Locked-Rotor 143.00 603.0 49.00 165.0 0 38.0 20.00
2/3 118.00 498.0 50.00 168.0 2,400 20.00
1/3 134.00 565.0 40.00 135.0 1,200 20.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 6.48 8.00 10.88 14.64 18.96 21.68 23.60
Rated Output (KW) 0.90 4.40 8.30 12.30 16.50 19.00 20.80
Efficiency (%) 0.0 84.5 89.5 91.0 91.0 90.6 89.9
Power Factor (%) 9.0 56.0 76.5 84.0 87.5 88.5 88.5
Speed (RPM) 3,600 3,585 3,570 3,555 3,540 3,530 3,522
Temp. Rise @ FL 0.0 0.0 0.0 0.0 60.0 80.0 95.0
Torque (ft-lbs) 0.00 7.30 14.70 22.00 29.70 34.00 37.00
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