Marathon 250 HP Definite Purpose AC Motor, 3 phase, 3600 RPM, 460 V, 447,449TS Frame, TEFC - L451

Catalog #:L451
Part #:449TSTFS8003
  • Frame constructions are heavy gauge steel or Aluminum, as noted
  • 1.15 Service Factor
  • Nameplated 60/50 hertz at next lowest horsepower
  • Will accept C-Face Kits as noted, also see Accessories section
  • Severe duty kits available, see Accessories section
  • Shaft slinger, Regreasable bearings (182T and larger), lead lugs (364T and larger), and bearing caps on 444T and larger
  • Ball Bearings, except where noted
  • UL Recognized and CSA Certified
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Weight:2,079.00 LB
List Price: $26,450.00

General Specifications

Weight: 2,079.00 LB Packaged Length: 56 IN
Packaged Width: 46 IN Packaged Height: 32.05 IN

Nameplate Specifications

Output HP: 250 Hp Output KW: 187 kW
Frequency: 60 Hz Voltage: 460 V
Current: 280 A Speed: 3570 rpm
Service Factor: 1.15 Phase: 3
Efficiency: 95 % Power Factor: 88
Duty: CONTINUOUS Insulation Class: H
Design Code: B KVA Code: F
Frame: 447/449TS Enclosure: TEFC
Thermal Protection: NOT Ambient Temperature: 40 °C
Drive End Bearing Size: 6313 Opp Drive End Bearing Size: 6313
UL: Recognized CSA: Y
CE: Y IP Code: 43

Technical Specifications

Electrical Type: SQ CAGE INV RATED Starting Method: PWS & YDRUN OR INV
Poles: 2 Rotation: REV
Resistance Main: 0.013 Ohms Mounting: RIGID
Motor Orientation: HORIZONTAL Drive End Bearing: BALL
Opp Drive End Bearing: BALL Frame Material: CAST IRON
Shaft Type: TS Overall Length: 48.11 in
Frame Length: 28.75 in Shaft Diameter: 2.38 in
Shaft Extension: 5 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)
Pull-Up 1,500.00 536.0 325.00 88.0 1,800 250.00
1/3 1,590.00 568.0 325.00 88.0 1,200 250.00
2/3 1,425.00 509.0 450.00 122.0 2,400 250.00
Locked-Rotor 1,700.00 610.0 525.00 142.0 0 24.0 250.00
Break-Down 1,050.00 400.0 950.00 258.0 3,430 66.0 250.00
No Load 78.00 28.0 0.00 0.0 3,600 8.0 250.00
Full Load 280.00 100.0 368.00 100.0 3,565 0.00 88.0 250.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 %
Current (Amps) 78.00 105.00 155.00 215.00 280.00 320.00 345.00
Rated Output (KW) 8.50 52.50 100.00 148.00 197.00 227.00 247.00
Efficiency (%) 0.0 89.5 93.6 95.0 95.0 95.0 94.1
Power Factor (%) 8.0 63.0 81.0 86.5 88.0 88.5 88.5
Speed (RPM) 3,600 3,592 3,585 3,578 3,570 3,565 3,562
Temp. Rise @ FL 0.0 0.0 0.0 0.0 80.0 110.0 0.0
Torque (ft-lbs) 0.00 91.50 183.00 275.00 368.00 424.00 462.00
Catalog #:L451A
Part #:449TSTFS14007
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