Marathon 25 HP Definite Purpose AC Motor, 3 phase, 3600 RPM, 230/460 V, 284TSC Frame, TEFC - U749

Catalog #:U749
Part #:284TSTFPA14003
  • Meets or exceeds NEMA Premium® efficiencies NEMA Premium® models are in compliance with EISA2007
  • Cast iron frame and brackets
  • Inverter Duty 10:1 Variable Torque and 10:1 Constant Torque, 1.0 SF (except as noted)
  • 1.15 Service Factor
  • Class F Insulation
  • Standard assembly F1, reversible to F2 assembly
  • UL Recognized, CSA Certified, CE Mark
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General Specifications

Weight: 385.00 LB Packaged Length: 35 IN
Packaged Width: 26 IN Packaged Height: 21.13 IN

Nameplate Specifications

Output HP: 25 Hp Output KW: 18.7 kW
Frequency: 60 Hz Voltage: 230/460 V
Current: 60.0/30.0 A Speed: 3525 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 91 % Power Factor: 86.5
Duty: Continuous Insulation Class: F
Design Code: B KVA Code: G
Frame: 284TSC Enclosure: Totally Enclosed Fan Cooled
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6311 Opp Drive End Bearing Size: 6210
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: .033 Ohms Mounting: Rigid Base
Motor Orientation: Horizontal Drive End Bearing: Ball
Opp Drive End Bearing: Ball Frame Material: Cast Iron
Shaft Type: TS Overall Length: 24.89 in
Frame Length: 12.75 in Shaft Diameter: 1.625 in
Shaft Extension: 3 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)
2/3 150.00 500.0 75.00 202.0 2,400 25.00
No Load 11.00 37.0 0.00 0.0 3,600 25.00
Full Load 30.00 100.0 37.20 100.0 3,525 25.00
Locked-Rotor 182.00 607.0 80.00 215.0 0 38.0 25.00
1/3 175.00 583.0 60.00 161.0 650 25.00
Break-Down 125.00 417.0 109.50 294.0 3,100 70.0 25.00
Pull-Up 165.00 550.0 65.00 175.0 1,800 25.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 11.00 13.00 17.50 23.20 30.00 33.50 37.00
Rated Output (KW) 1.25 5.50 10.50 15.50 20.50 23.50 26.00
Efficiency (%) 0.0 85.5 90.2 91.0 91.0 91.0 90.2
Power Factor (%) 8.0 53.0 74.0 83.0 86.5 88.0 88.5
Speed (RPM) 3,600 3,580 3,565 3,545 3,525 3,510 3,500
Temp. Rise @ FL 0.0 0.0 0.0 0.0 65.0 85.0 105.0
Torque (ft-lbs) 0.00 9.20 18.50 28.00 37.20 43.00 47.00
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