Marathon 250 HP Variable Speed Motor, 3 phase, 1800 RPM, 460 V, 449T Frame, TEBC - Y531

Catalog #:Y531
Part #:449THFS8046
  • MAX GUARD® Class H insulation system
  • Constant torque operation from 0 to base speed on vector drive, including TEFC (On Volts/Hertz drives, TEFC motors are limited to 20:1 constant torque
  • Constant HP operation to twice base speed (143-256 frame);1.5 times base (all others)
  • Optimized for operation with IGBT inverter (NEMA Design A)
  • Normally closed thermostats (one per phase, class F)
  • Blue Chip quality, cast iron frame and brackets
  • Patented “fracket” design (TEBC enclosure)
  • Separate power supply required for blower motor
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Weight:2,991.00 LB
List Price: $58,566.00

General Specifications

UPC: 722856025449 Weight: 2,991.00 LB
Packaged Length: 66 IN Packaged Width: 46 IN
Packaged Height: 32.86 IN

Nameplate Specifications

Output HP: 250 Hp Output KW: 187.0 kW
Frequency: 60 Hz Voltage: 460 V
Current: 295.0 A Speed: 1790 rpm
Service Factor: 1 Phase: 3
Efficiency: 95 % Power Factor: 84
Duty: Continuous Insulation Class: H
Design Code: INV KVA Code: H
Frame: 447/449T Enclosure: Totally Enclosed Blower cooled - Axial
Thermal Protection: No Ambient Temperature: 40 °C
Drive End Bearing Size: 6319 Opp Drive End Bearing Size: 6318
UL: Recognized CSA: Y
CE: Y IP Code: 43

Technical Specifications

Electrical Type: Squirrel Cage Inverter Duty Starting Method: Inverter Only
Poles: 4 Rotation: Reversible
Resistance Main: .01 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: 64.34 in
Frame Length: 28.75 in Shaft Diameter: 3.375 in
Shaft Extension: 8.75 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)
Locked-Rotor 2,075.00 703.0 1,475.00 201.0 0 28.0 250.00
Break-Down 1,140.00 386.0 2,065.00 281.0 1,750 250.00
2/3 1,750.00 593.0 1,550.00 211.0 1,200 250.00
Full Load 295.00 100.0 734.00 100.0 1,790 250.00
1/3 2,000.00 678.0 1,325.00 181.0 600 250.00
Pull-Up 1,900.00 644.0 1,350.00 184.0 900 250.00
No Load 106.00 36.0 0.00 0.0 1,800 250.00

Load Characteristics

% of Rated Load 0 % 25 % 50 % 75 % 100 % 115 % 125 % 200 %
Current (Amps) 103.00 125.00 170.00 230.00 295.00 340.00 360.00 0.00
Rated Output (KW) 4.50 52.50 100.00 148.00 196.00 225.00 245.00 0.00
Efficiency (%) 0.0 88.5 93.0 94.5 95.0 95.0 94.5 0.0
Power Factor (%) 8.0 52.0 73.0 81.0 84.0 85.0 86.0 0.0
Speed (RPM) 1,800 1,796 1,794 1,792 1,790 1,788 1,785 0
Temp. Rise @ FL 0.0 0.0 0.0 0.0 65.0 85.0 0.0 0.0
Torque (ft-lbs) 0.00 183.00 366.00 550.00 734.00 845.00 920.00 0.00
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